6 Creative Solutions - SGI Malta

CREATIVE SOLUTIONS 6

248

C R E A T I V E S O L U T I O N SINTRODUCTION

TECHNICAL ENQUIRYLINE t 01275 377789 f 01275 377456 www.lafargeplasterboard.co.uk

ContentsPerformance tables 249

Fresco 251

Cove 261

Profiles 267

Contour Walls 281

What Can Go Wrong Checklist 283

Lafarge FrescoLafarge Fresco raised panelwallboards allow the traditionalappearance of panelled walls andceilings to be achieved economicallywith normal drylining techniques.

Lafarge Fresco panels can beinstalled on timber or Cormet metalframing in a similar way to standardplasterboard. They can also be directbonded to sound, dry backgrounds.

Lafarge CoveLafarge Cove is a simple and costeffective way of adding attractiveand distinctive features to the walland ceiling junction. Designed forinternal use Lafarge Cove cancomplement many room styles.

Lafarge ProfilesThe Lafarge Profile range ofarchitectural design products allowsfeatures once only possible with wetplaster and costly one-offcomponents to be achieved quicklyand economically.

The Lafarge Profiles range enablesthe designer to use plasterboard innew and more imaginative ways.

Lafarge Shadowline Profiles providemany opportunities for theintroduction of relief andarticulation to wall and ceilingsurfaces.

A softer approach is possible withLafarge Softform Profiles to createsmooth curves.

Contour WallsCurved wall surfaces, which oncerequired time-consuming wetplaster technology or expensivefibrous plaster mouldings, can nowbe formed with quick andinexpensive Lafarge drywall systems.Utilising the drywall advantage it isnow possible to create high qualitycurved plaster forms with standardwallboards and at the same timemeet tight time and cost restraints.

System selection

Selection criteria:

Overall Width mm 82 – 178 – – –

Fire Resistance minutes 60 – 120 – – –

Maximum Height mm 6200 – – –

Sound Resistance dB 39 – 46 – – –

Weight kg/m2 27 – 49 – – –

Common application areas:

Residential: New Housing■ ■ ■ ■

Flats■ ■ ■ ■

Renovation■ ■ ■ ■

Commercial: Offices■

–■ ■

Entertainment■

–■ ■

Institutional■

–■ ■

Shops■

–■ ■

Industrial: Factories – – – –

Warehouses – – – –

Specials: Cinemas – –■ ■

Hospitals –■ ■ ■

Lafa

rge

Cove

Lafa

rge

Fres

co

Lafa

rge

Prof

iles

Cont

our

wal

ls

Wei

ght

(kg/

m2 )

Max

imum

hei

ght

(m)*

Nom

inal

thi

ckne

ss (m

m)

Fire

res

ista

nce

(min

utes

)

to B

S 47

6, a

nd B

S EN

136

4So

und

insu

lati

on (R

wdB

)


C R E A T I V E S O L U T I O N S

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6

Performance tables

FCP 01

FCP 02

Studs: 50mm Cormet C Stud (CS50/R) at 400mm centres

Facings: one layer Lafarge Fresco wallboard both sides

Studs: 70mm Cormet C Stud (CS70/R) at 400mm centres


Studs: 146mm Cormet C Stud (CS146/R) at 400mmcentres


Table 6.1 Typical Lafarge Fresco systems:Cormet Metal Stud partitions

27 2.7 82 30 37

30

29 3.8 102 30 38

30

System reference Specification

FCP 03 30 6.2 178 30 41

30

FCP 04 Studs: 70mm Cormet C Stud (CS70/R) at 400mm centres

Facings: inner layer 12.5mm Lafarge Firecheckwallboard, outer layer Lafarge Fresco wallboard bothsides

49 4.6 127 120 48

90

The values shown above are for imperforate systems utilising taper edge plasterboard with all joints taped and filled and systems installed in accordance withthe recommendations of Lafarge Plasterboard Ltd. The quoted performance can only be achieved by the use of Lafarge components throughout. Any variationshould be referred to the Lafarge Technical Enquiryline for confirmation of acceptance.

Wei

ght

(kg/

m2 )

Max

imum

hei

ght

(m)*

Nom

inal

thi

ckne

ss (m

m)

Fire

res

ista

nce

(min

utes

)

to B

S 47

6, a

nd B

S EN

136

4So

und

insu

lati

on (d

B) R

w

250



Performance tables

Wei

ght

(kg/

m2 )

Fire

res

ista

nce

(min

utes

)

to B

S 47

6

Wei

ght

(kg/

m2 )

Fire

res

ista

nce

(min

utes

)

to B

S 47

6, a

nd B

S EN

136

5So

und

insu

lati

on a

irbo

rne

(dB)

Rw

Soun

d in

sula

tion

impa

ct

(dB)

Lnw

FTP 01 Timber studs: 63 x 38mm at 400mm centres


Table 6.2 Typical Lafarge Fresco systems:Timber stud partitions

31 3.0 107 30 38

30

System reference Specification

FTC 01 Flooring: minimum 18mm timber or T&G chipboard

Joists: 47 x 200mm at 600mm centres

Facings: one layer Lafarge Fresco Ceiling Panel on timber battens at 400mm centres

Table 6.3 Typical Lafarge Fresco systems: Ceiling to timber floor

37 30 38 78

30

Table 6.4 Typical Lafarge Fresco systems: Cormet Metal Furring Ceilings

FCE 01 Ceiling: one layer Lafarge Fresco Ceiling Panel onCormet Ceiling Channel at 400mm centres

15 30

The values shown above are for imperforate systems utilising taper edge plasterboard with all joints taped and filled and systems installed in accordance withthe recommendations of Lafarge Plasterboard Ltd. The quoted performance can only be achieved by the use of Lafarge components throughout. Any variationshould be referred to the Lafarge Technical Enquiryline for confirmation of acceptance.

Lafarge Fresco allows theappearance of traditional timberpanelling to be re-created withease, using modern drywallmaterials.

Available for walls, stairwells andceilings, Lafarge Fresco can beinstalled as quickly and efficientlyas other drywall boards, allowingstunning effects to be achieved atrealistic cost.

The boards can be decorated tomimic timber, or painted and canalso accept a range of specialdecorative effects.


C R E A T I V E S O L U T I O N SFRESCO

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252



Introduction

Lafarge FrescoLafarge Fresco raised panelwallboards allow the traditionalappearance of panelled walls andceilings to be achieved economicallywith normal drylining techniques.

They can be used for both housingand commercial buildings in newand refurbishment work, as a walland ceiling lining or as a partitionfacing (on one or both sides).

Lafarge Fresco panels can beinstalled on timber or Cormet MetalFraming in a similar way to standardplasterboard. They can also be directbonded to sound, dry backgrounds.

Composition

Lafarge Fresco is produced using aunique plasterboard manufacturingprocess. The plaster core containsglass fibres and fillers.

Authority

Lafarge Fresco plasterboardcomplies with BS 1230: Part 1: 1985for Type 5 gypsum wallboard.

Appearance

The sculptured face of LafargeFresco panels has a pink liner papersuitable for direct decoration.Lafarge Fresco can be used withLafarge Drywall jointing systems toprovide a continuous panelled effectwith a smooth seamless finish thatwill accept a range of paint finishes.

Performance

Lafarge Fresco has fire resistant andsound insulation propertiesequivalent to 12.5mm LafargeFirecheck wallboard and can besubstituted directly for it in LafargeDrywall systems.

Thermal insulation

Thermal conductivity (λ) is 0.25 W/mK.Thermal resistance (R) value is 0.050 m2K/W.

Range

There are four Lafarge Fresco panelsavailable in two panel designs, asshown in Table 6.5.

Standard Fresco boards are designedfor use in housing and small roomareas in retail and commercialbuildings.

Fresco Grand boards have a biggerpanel imprint for lining larger wallsurfaces, such as hotel corridors andreception areas.

Table 6.5 Fresco rangeStandard Fresco Fresco Grand

Wainscot Panel ✓ ✓

Mainwall Panel ✓ ✓

Ceiling Panel ✓ ✓

Stairwall Panel ✓

Fresco Standard Panel

Fresco Grand Ceiling Panel



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Components

Fresco Wainscot Panel

Wainscot Panels are designed foruse along the lower part of a wallbetween the floor and a chair rail ordado rail. They can also be used oneabove the other to cover the wholewall height.

Wainscot Panels are available inFresco Standard and Fresco Granddesign patterns.

Fresco Mainwall Panel

Mainwall Panels are designed foruse above Wainscot. Boards can alsobe used one above the other tocover the whole wall where ceilingheights permit.

Mainwall Panels are available inFresco Standard and Fresco Granddesign patterns.

Fresco Ceiling Panel

Ceiling Panel boards can be buttjointed to form a continuouspanelled ceiling.

Ceiling Panels are available in FrescoStandard and Fresco Grand designpatterns.

Fresco Stairwall Panel

Fresco Stairwall Panel enablesFresco panelling to continue up thestairs. The panel is ideal for bothnew build and refurbishmentapplications.

Fresco Stairwall Panel is 400mm x1300mm and easily adjusts to anystair angle up to 42º. The panelshave a recess on both long edges toallow for easy jointing.

Stairwall Panels are not available inFresco Grand pattern.

Table 6.6 Board sizesPattern Length (mm) Width (mm) Thickness (mm)

Wainscot Panel 800 1200 15

Mainwall Panel 1600 1200 15

Ceiling Panel 1200 1200 15

Stairwall Panel 1300 400 15

50 300

30

100 300 100 300 50

30

30

30 90

560

15030

800

1200

100

300

1200

1600

50 300

30

100 300 100 300 50

30

1200

1200

400

370

1300560

370

300

30 3020 20

50 50

StandardMainwall Panel

Standard Wainscot Panel

Standard Ceiling PanelStairwall Panel

Lafarge Standard Fresco Panel range

All dimensions in mmScale 1: 20

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Components

1200

110050 50

1600 1400

100

100

90

560

150

800

1200

1200

1200

50050 500 50100

Grand Mainwall Panel

Grand Wainscot Panel

Grand Ceiling Panel

Lafarge Fresco Grand Panel range

All dimensions in mmScale 1: 20



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Setting out and planning

Careful planning at setting outstage can result in savings in bothtime and materials duringinstallation.

Except where the panelling is to beinstalled in simple rectangular areaswith no interruptions, it isrecommended that a detaileddimensioned layout is prepared foreach installation.

Wall layouts

Wherever possible, the location offeatures such as doors, windows,radiators etc. should be planned tosuit the setting out of the LafargeFresco panels. Fixtures, and itemssuch as electrical socket outlets,switches, television and telephoneoutlets should be positioned to fallwithin the flat surfaces of thepanels.

Where openings cannot be plannedto suit the module of the LafargeFresco panels, spacer pieces will berequired at ends of runs. Therecessed edge of Lafarge Frescopanels allows them to be jointedwith tapered edge 15mm LafargeFirecheck wallboard.

Set out framing at 400mm centres,or where direct bonded apply dabsof Lafarge Bonding Compound invertical rows at 400mm centres.

Additional framing is required tosupport horizontal joints.

Standard MainwallPanel above StandardWainscot Panel,height 2400mm

Three StandardWainscot Panels,height 2400mm

Plain wallboardabove StandardWainscot Panel,height as required

Wall layouts

Grand Mainwall Panelabove Grand WainscotPanel,height 2400mm

Three Grand WainscotPanels,height 2400mm

Standard MainwallPanel above GrandWainscot Panel,height 2400mm

Application details

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Application details

Table 6.7 Recommended screw lengthsConstruction Plasterboard Screw length Type

thickness (mm) (mm) Lafarge

Timber framing Single layer 15.0 41 High Thread

Double layer 15.0 + 9.5 51 High Thread




Steel framing Single layer 15.0 25 Self Tapping Drywall

Double layer 15.0 + 9.5 38 Self Tapping Drywall




NB: Actual configurations of framing andin-fill board will vary with setting out

Cutting

Always support the boards toprevent flexing. Lafarge Frescoshould be cut with a fine-toothedsaw, alternatively use a sharp knifeto deeply score the face, gentlybreak the board from the back andcut the other liner. Do not cut acrossthe sculptured panels. Keep cuts atleast 25mm from the sculpturedpanel edges.

Fixings to timber/Cormet MetalFraming

Use appropriate Lafarge Screws forfixing.

Screw lengths are given in table 6.7.

Screw position

• at least 10mm in from paperbound edges of the boards

• within the flat surfaces of thesculptured panels, at least 25mmin from the pattern edges

• at least 13mm in from any cutedges of the boards

Screw spacing

• 230mm centres on ceilings and150mm centres around ceilingperimeters and cut ends of board

• 300mm centres on walls andpartitions

Spot screw heads with jointingcompounds to provide a flushsurface.

Alternatively Lafarge Fresco panelsmay be installed by direct bondingwith Lafarge Bonding Compound.

Refer to page 30 for recommendations and limitations.

Jointing

The unique recessed edge of LafargeFresco enables the panels to bejointed using similar techniques totapered edge plasterboards.

Finishing

Finish the installed panels withLafarge Universal Sealer or LafargeDrywall Sealer and as normal withemulsion paint. Spray paintingproduces the best appearance. Paintmay also be applied to the flat areasof the boards with a very finetextured roller, and to thesculptured areas with a brush.

Repairs

If localised damage to thesculptured panels should occur,repair using ornamental plastertechniques. Flat areas may berepaired in the normal way.

Typical joint

Joint tape Recessed edges finish flushwith jointing compound

External corner

Internal corner

Jointing compound

50mm

In-fill with 12.5mmLafarge Firecheckwallboard

Lafarge Tape-On Bead



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Application details

Stairwall Layouts

Planning

As for regular Lafarge Frescopanels, planning prior to installationis critical. For best results, includethe landing and hall in the stairlayout diagram.

• Measure the horizontal length ofthe staircase (A).

• Divide this length by 400mm togive the number of panelsrequired.

• For example A = 2500mm ÷ 400 =6 with 100mm left over. Panellingwill therefore start 50mm frombottom edge.

• Position panels as on the drawing.

• Plan hall and landing as forregular Fresco.

Panels should be cut to the stairangle (maximum 42º) passing nocloser than 40mm to the mouldedpattern, at top and bottom.

For lower angle stairs this distancemay be increased as taste dictates.

It may be preferable to place alarger filler piece at the end of thehall and landing to ensure smoothflow of panelling up the stairs.

Installation

Install panels as for regular Fresco,butting to the string of the stairs.

Alternatively Lafarge Fresco panelsmay be direct bonded to theexisting wall using Lafarge DrywallAdhesive. Secure with 60mmLafarge Nailable Plugs into masonrybackgrounds.

40mmminimum

42º maximum

Critical dimensions

1250 2500 1250

A

1250 2400 125050 50

1200 2400 120050 50

Setting out Stairwall Panels

Note, skirtingand dado railby others

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Application details

Ceiling layouts

Where the ceiling includes recessedor surface mounted lighting fittingsthey should be positioned in thecentres of raised panels, borders orspacer pieces.

In planning ceiling layouts use amodule of 400mm for FrescoStandard and 600mm for FrescoGrand.

Rectangular Rooms: If the overallceiling dimensions are multiples of1200mm, the entire ceiling may becovered with uncut butt-jointedboards.

If the overall ceiling dimensions aremultiples of 400mm (600mm), theceiling should be made up of fullboards plus a perimeter surround ofuniform width, made up from 15mmtaper edge Lafarge Firecheckwallboard.

Rectangular Rooms, non-modular:Prepare a dimensioned layout. Makeup perimeter areas as necessary withfiller pieces of 15mm taper edgeLafarge Firecheck wallboard makingthe border widths as uniform aspossible.

Set out framing at 400mm (300 for600mm module) centres. Provideadditional framing as required.

Handling and storage

These products require more care inhandling than Standard wallboard.Packs as delivered should be storedflat and not opened until thedetailed instruction sheet providedwith each pack has been readcarefully. To install, tilt each boardupright onto one cut edge and carryin the vertical position to theframing, taking care not to flex theboard whilst screwing into position.

Ceiling layouts

Rectangular room, 1200mm module

Rectangular room, 400mm module

400mm module

Rectangular room, non modular

15mm Lafarge Firecheck wallboard perimeter surround



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Specification clauses

Lafarge Fresco

Scope

Alternative clauses for specifyingLafarge Fresco to linings, partitions,timber framed or suspendedceilings.

Additional clauses

Add general clauses (see Section 8) ifrequired for:

• Health and safety

• Storage of materials

• Site conditions and workmanship

NBS clauses

When using the NBS Specification,use clause K10 PLASTERBOARD DRYLININGS/PARTITIONS/CEILINGS.

The Lafarge Plasterboard websitecontains a full set of NBS clauses,completed for each LafargePlasterboard system. See:www.lafargeplasterboard.co.uk/nbssearch/index.asp

System reference (Insert Lafarge system reference from the Performance tables)

Location ........................Client reference ........................Adhesive applicationApply Lafarge Bonding Compound or Lafarge Multi Purpose Adhesive in250mm dabs at 300mm centres in vertical rows, ……… /No. rows per board. (3 No. rows for Fresco Grand, 4 No. rows for Standard Fresco.)

Finished thickness to be 10-25mm.

Cormet Metal Framing componentsFraming components to be hot dipped galvanised steel to BS EN 10143: 1993and BS EN 10142: 1990 and Approved Document A1: 1995 designated DX51Dand Z275 NAO. Sections rolled to BS 2994: 1987.

FramingProvide extra framing to support fixing of Fresco at ……… mm centres.(400mm centres for Standard Fresco and 300mm centres for Fresco GrandCeiling Panels.)

BoardingLafarge Fresco ……………………………panels.

Size ……… mm x ……… mm Thickness 15mm.

(Panel types and sizes are given on pages 261 and 262)

InstallationAll materials unless otherwise indicated shall be supplied by LafargePlasterboard Ltd, and shall be installed in accordance with their currentliterature and in accordance with BS 8212: 1995.

Notes:

Red text lists alternative productspecifications.

(Italic red text within bracketsgives advice on selecting theinformation needed).

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Case study

Lafarge Cove products makeadding a quality finish, with style,both simple and affordable.Readily fixed with Lafarge CoveAdhesive.

Use of Lafarge Cove inconjunction with strips ofplasterboard allows still moreintricate designs to be created.

Once reserved for prestige homes and the principal rooms of properties, these products now allow cove to be addedthroughout a development atminimal cost.


C R E A T I V E S O L U T I O N SCOVE

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262



Introduction

Lafarge CoveLafarge Cove is a simple and costeffective way of adding attractiveand distinctive features to the walland ceiling junction. Designed forinternal use Lafarge Cove cancomplement many room styles.

Composition

Lafarge Cove is made from plasterencased in a strong paper liner. Thesquare back profile and puregypsum core provide high strengthand rigidity giving easy fixing andgood workability.

Sizes

See table 6.8.

Lafarge Cove Adhesive

Lafarge Cove Adhesive is a gypsumbased compound with a 40 minutesetting time. It has exceptionalsmoothness for ease of applicationand dries white for ease ofdecoration. Lafarge Cove Adhesiveis also ideal for filling and patchingLafarge Cove.

Table 6.8 SizesGirths Lengths Weights(mm) (mm) (kg/m)

90 3000, 3600 0.9

120 3000, 3600, 4200 1.4

Cove 120

Cove 90

Cove 120

Cove 90

84

64



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6

Application details

Fixing Cove

• Sit the lengths of cove on the nailsand press into position betweenthe guidelines, carefully lining upjoints and intersections.

• Clean off surplus adhesive withfilling knife and smooth using asponge.

• Using Lafarge Cove Adhesive fillany gaps between the cove andthe wall or ceiling. Make good allinternal and external junctions.

• Remove all temporary nails oncethe cove adhesive has set and fillnail holes.

• Using a damp sponge, clean offany adhesive residue from thewalls, ceiling and cove surface.

With uneven ceilings it may benecessary to permanently nail thecove about 25mm from one edgeusing Lafarge Drywall Nails. Nailheads should be countersunk andcovered with Lafarge Cove Adhesive.

Where surfaces have been previouslypainted, they must be abradedvigorously with sandpaper or a wirebrush and coated with a 50:50mixture of a PVAC bonding agentand water. For further detailscontact the Lafarge TechnicalEnquiryline (01275 377789).

System assembly

The following instructions describethe correct method of installationfor Lafarge Cove. Any variations ofthese methods may produceunsatisfactory results.

Preparation of background

Make sure the background is dryand rigid. Any wallpaper,whitewash, distemper or loosedecorations should be removed.Brush over the surface to removeany remaining loose particles anddust.

Measuring and cutting

• Using a chalk line strike guidelineson ceiling and wall to the correctprojection and depth:64mm for 90mm Lafarge Cove84mm for 120mm Lafarge Cove

• Using the guidelines on the walldrive in nails at 1500mm centres toact as a temporary support whilethe cove adhesive sets.

• Using a fine-toothed saw cut allthe pieces of cove to length andmitre to fit the corners of theroom.The mitres can be cut using amitre block or template. Templatesare available from LafargePlasterboard Literatureline orwww.lafargeplasterboard.co.ukNote: It is best practice to fit thelongest lengths first and work inone direction around the room. If the room has a chimney breaststart on the face of the chimneyand work in one direction aroundthe room.

Mixing and applying LafargeCove Adhesive

• Ensure the site temperature neverfalls below 5ºC.

• Always use clean tools and water.

• Pour clean, drinkable water into acontainer.

• Gradually add the amount ofLafarge Cove Adhesive that can beused within 30-40 minutes, stirringcontinuously.

• Mix to a smooth, thick, lump freeconsistency.

• Stir mixture immediately before use.

• Apply the adhesive in beadsapproximately 3mm thick and10mm wide along the full lengthon each back edge of the cove.

• Apply to one cove section at a time.

Decorating

Lafarge Cove is suitable for mosttypes of decoration including:

Painting

Apply one coat of Lafarge UniversalSealer, or if a vapour control layer isrequired use two coats of LafargeDrywall Sealer, and decorate asrequired.

Paper borders

Paper borders may be applied to thepainted surface to providedistinctive appearance.

Texturing

Apply Lafarge Universal Texture orsimilar according to manufacturer’sinstructions and recommendations.

Plasterboard strips

The addition of plasterboard stripsbetween the coving and thewall/ceiling can greatly enhance thecoving feature. See details on nextpage.

Ensure that the visible edges of theplasterboard strips are bound edgesto facilitate decoration.

Lafarge Cove bonded with LafargeCove Adhesive at wall and ceiling

264



Application details

Examples of coving details using LafargeCove and Lafarge Standard wallboard

Lafarge Cove bonded with LafargeCove Adhesive at ceiling toLafarge Standard wallboard strip100mm wide securely fastened toceiling*

Lafarge Cove bonded with LafargeCove Adhesive at ceiling to twostrips of Lafarge Standardwallboard 100mm wide securelyfastened to ceiling*

Lafarge Cove bondedwith Lafarge CoveAdhesive at wall andceiling to LafargeStandard wallboard strip100mm wide securelyfastened to wall andceiling*

Lafarge Cove bonded withLafarge Cove Adhesive atwall and ceiling to twoLafarge Standard wallboardstrips 100mm wide securelyfastened to wall and ceiling**Use square edge wallboard,

bound edges outward.



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Lafarge Cove

Scope

The application of Lafarge Cove atthe wall/ceiling junction.

Additional clauses





NBS clauses



Location……………………………………Client reference ........................BackgroundThe background shall be undecorated new plasterboard, or

The painted surface to be abraded to make a new key and treated with PVACbonding agent to BS 5270, or

The textured coating to be removed taking care not to damage the surface ofthe plasterboard beneath. Once texture is removed, treat surface with PVACbonding agent to BS 5270.

Plasterboard stripsInstall strips of ……mm thick Lafarge Standard wallboard in accordance withdetail reference ……… using Lafarge Cove Adhesive. (Insert information onplasterboard thickness and detailed drawing reference)

CovingLafarge Cove, width 120mm or 90mm to be fixed using Lafarge Cove Adhesivefully in accordance with Lafarge Plasterboard’s instructions, including fillinggaps with adhesive.

Drywall SealerOnce dry, the surface of the Cove shall be sealed with one coat of LafargeDrywall Sealer or Lafarge Universal Sealer.

DecorationThe Cove shall be decorated with the adjacent plasterboard (or other)surfaces.

InstallationAll materials unless otherwise indicated shall be supplied by LafargePlasterboard Ltd, and shall be installed in accordance with their currentliterature and in accordance with BS 8212: 1995.

Notes:




266



Case study


C R E A T I V E S O L U T I O N SPROFILES

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6

The Lafarge Profiles rangecomprises metal sections designedto complement the Lafarge boardrange and allow the creation ofintricate details, reveals,shadowlines, and uplighters.

These products offer the architectthe opportunity to expandcreative horizons and achieveapparently complex design effectswith remarkable ease.

268



Introduction

Lafarge ProfilesThe Lafarge Profile range ofarchitectural design products allowsfeatures once only possible with wet plaster and costly one-offcomponents to be achieved quicklyand economically.

The Lafarge Profile range enablesthe designer to use plasterboard innew and more imaginative ways,and to create interesting andpleasant living and workingenvironments whilst meetingmodern requirements for use ofspace and performance.

Lafarge Profiles offer two powerfuldesign solutions:

Shadowline and Softform

Lafarge Shadowline Profiles providemany opportunities for theintroduction of relief andarticulation to wall and ceilingsurfaces: expressed joints, reveals,accented junctions, recessedpanelling and stepped cornices,architraves and mouldings.

A softer approach is possible withLafarge Shadowline Profile to createsmooth curves at intersecting planes,corners, door surrounds, partitionjunctions and bullnose ends.

The Lafarge Profiles Uplighter rangeof fittings incorporate the steppedand rounded corner details of theShadowline and Softform profilesrespectively

Performance

Fire protection

Where fire resistance is required, anadditional layer of Lafarge wallboardmust be added to the basic fire-resisting partition to accommodatethe Lafarge Profile. Installations usingLafarge Profiles will maintain theClass 0 flame spread rating ofLafarge plasterboard.

Sound insulation

The acoustic performance of apartition may be compromised byusing Lafarge Profiles. To maintainacoustic performance an additionallayer of Lafarge wallboard must beadded to the basic sound resistingpartition to accommodate theLafarge Profiles.

Composition

All Lafarge Profiles are producedfrom high-strength dimensionallyprecise aluminium alloy extrusions.They are finished with a corrosion-resistant high-porosity primer whichis compatible with most materialscommonly in use in commercial anddomestic interiors, such as vinylemulsion paints and wallcoveringadhesives etc.

Shapes, sizes

All Profiles are supplied in lengths of3000mm. The full range of sectionsis shown on the following pages.

Profile features

Pre-drilled fixing slots/holes

Ribs form a key for jointingcompound

Treated with corrosion-resistant high-porosity primer

High strength aluminiumresists impact

Dimensionally preciseextrusions ensures crisp edgesand allows minimaltolerances to be achieved



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Components

Table 6.9 Lafarge Softform componentsComponent Lafarge Description/use

code

Softform Uplighter SUS52 Curved casing to incorporate linear

lighting

Uplighter Support USB1 Provides a mounting for linear lighting

Bracket

Softform Bullnose SB75 Creates a smooth round finish to a

SB95 partition end and projecting bulkhead

Softform Outside SO64 Allows partitions and wall linings to be

Corner SO76 constructed with 90° corners. No

additional impact protection is required

Softform Inside SI64 Allows partitions and wall linings to be

Corner SI76 constructed with 90° corners. No

additional impact protection is required

Trim Head Screw 41THST25 A self tapping screw for flush finish

57THST25 with Lafarge Profiles

52

120

128

120

100

76 114 64 98

76105 64

86

7698

Softform UplighterSUS52

Uplighter SupportBracket USB1

Softform Bullnose

SB95 SB75

Softform 90º Inside Corner

SI76 SI64

Softform 90º Outside Corner

SO76 SO64

Dimensions of Softform profiles

270



Components

Table 6.10 Lafarge Shadowline componentsComponent Lafarge Description/use

code

Shadowline Uplighter SUS4 Crisp stepped extrusion to incorporate

linear lighting

Uplighter Support USB1 Provides a mounting for linear lighting

Bracket

Shadowline Reveal SWR12.5 Provides a means of relieving runs of

SWR25 drywall with recessed accent lines

Shadowline Hanging SHR12.5 Incorporates a concealed track for

Reveal picture and other lightweight hangings

Shadowline Picture SPH1 For use with Shadowline Hanging

Hanger Reveal

Shadowline Corner SCS2 Allows complex corner details to be

Step SCS4 incorporated into wall angles, ceilings,

soffits and columns

Shadowline Trim Reveal STR12.5 Enables neat architrave details to be

STR25 created around door frames, skirtings

and at partition junctions

Shadowline Z Step SWZ12.5 Allows the drywall linings to be easily

SWZ25 raised or recessed

Shadowline Edge Trim ST12.5 Sharp 90° aluminium extrusion installed

ST25 against cut edges of plasterboard

Shadowline Flex Trim STF12.5 Allows raised or recessed panels or

STF25 opening in walls to be constructed with

curved edges

Shadowline Skirting SWB105 The Shadowline Skirting provides a

recessed finish to the wall at floor level.

The bottom edge of the skirting is

thinner to allow scribing to an irregular

floor surface

Trim Head Screw 41THST25 A self tapping screw for flush finish

57THST25 with Lafarge Profiles

Shadowline UplighterSUS4

Uplighter Support BracketUSB1

128

120

100

120

Dimensions of Shadowline profiles



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6

Components

22

25

22

11 11

22

12.5

22

22

12.5

32

11

Shadowline Reveal

ShadowlineHanging RevealSHR12.5 andPicture HangerSPH1

SWR25 SWR12.5

STR25

11

25

22

11

12.5

22

STR12.5

Shadowline Trim Reveal

24

22

24

22

25 12.5

SWZ25 SWZ12.5

Shadowline Z Step

22

25

22

12.5 25 12.5

22 22

ST25 ST12.5

Shadowline Trim

STF25 STF12.5

Shadowline Flex Trim

22

22 8

SCS4 SCS2

Shadowline Corner Step

88

12.5

12.5

12.5

22

12.5

22 12.5

22

11

104

Shadowline SkirtingSWB105

1.8mm diameterhole in PictureHanger to receivewire hanger byothers

Dimensions of Shadowline profiles

272



Application details

Shadowline UplighterLafarge Profile Uplighter is a non-structural feature designed to incorporate linear fluorescentlighting up to 100mm in width. Theassembly uses Lafarge UplighterSupport Brackets (USB1) to providea mounting for linear lighting.

System Assembly

Lafarge Profile Uplighter can befixed to drylined masonry walls andpartitions. Lafarge Profile Uplighterrequires no special installationtechniques, however considerationof its location during setting out willreduce time and wastage andenable the position of anyadditional framing required tosupport the assembly to bedetermined.

Fixing Brackets

After boarding, screw fix LafargeUplighter Support Brackets throughthe plasterboard and into thesupporting framing, as required,centres not to exceed 1200mm.

For masonry walls, drill and plug toa minimum 25mm into masonry.

When fixing to an existing partition,first locate the existing studwork.Screw fix at least one side of theLafarge Uplighter Support Bracketto the framing and secure the otherside to the plasterboard withLafarge Laminating Screws.

Fixing Uplighters

Cut Lafarge Profile Uplighter tolength using a mitre box and largehack saw. Accuracy with cuts andmitres will ensure crisp jointing.Offer the Lafarge Profile Uplighterto the Lafarge Uplighter SupportBrackets and fit. Screw fix throughthe fixing fin and plasterboard intothe framing at 150mm centres.

For masonry walls, drill and plug toa minimum 25mm into masonry.

For existing partitions, screw fix atexisting framing centres, run acontinuous bead of Lafarge DrywallAdhesive along the fixing fins andsecure fix between the framingcentres with Lafarge LaminatingScrews at 150mm centres. Allow tocure for 24 hours.

Lengths of uplighters may be buttjointed and cut ends supported by aLafarge Uplighter Support Bracket.Flush joints may be created by filingbevels on the cut ends to form ashallow v-joint, then filling withglass fibre/resin metal body puttyand sanding smooth.

Shadowline Uplighter

Lafarge Profile ShadowlineUplighter SUS4

Lafarge Profile UplighterSupport Bracket USB1

Lafarge Profile SoftformUplighter SUS52

Lafarge Profile UplighterSupport Bracket USB1

Softform Uplighter



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6

Application details

Shadowline Profiles

Shadowline Reveal

Lafarge Profile Shadowline Revealscan be used to provide horizontal orvertical recessed bands with crisp,well-defined edges in wall linings,ceilings and partitions.

Shadowline Hanging Reveal

The Lafarge Profile ShadowlineHanging Reveal offers a simple andeffective solution to the problem ofproviding unobtrusive picture rails,for the home, office or gallery.

It is suitable for hangings with apoint load of up to 50kg and amaximum loading not exceeding100kg/m UDL without additionalframing supports. Contact ourTechnical Enquiryline for furtherdetails.

Using a file or drill, form a 25mmcut-out in at least one end of eachrun of Reveal before fixing, to allowfor insertion of hangers.

12.5mm Shadowline RevealSWR12.5 screw-fixed throughplasterboard to CormetMetal Stud

ShadowlineHanging RevealSHR12.5 securedthroughplasterboard toCormet MetalStud

Form cutout toaccept picturehanger at buttjoints or ends ofruns beforeinstallation

Wire hanger frompicture hanger byothers

1.8mmdiameter hole

File back topparts of grooveto form 25mmcutout forinsertion ofpicture hanger

274



Application details

30mm diameter dabLafarge DrywallAdhesive at 300mmhorizontal centres

Joint taped and filled

Cormet U Track

1.5mmgap

Shadowline Skirtingscrew fixed throughplasterboards toCormet Metal Studs

Shadowline Skirting

The Lafarge Shadowline Skirtingprovides a recessed finish to the wallat floor level. The bottom edge ofthe skirting is thinner to allowscribing to an irregular floor surface.

Apply a 6mm bead of LafargeDrywall Adhesive along the centreof the skirting panel. Fasten skirtingby fixing fins, then countersink twoscrews through to the framing ateach end of the skirting panel.

Shadowline Z Step

Shadowline Z Steps provide a quickmethod of forming recessed panels.They ensure that sharp, even cornerscan be achieved swiftly. The fins ofthe Z step are tapered to allowsmooth jointing to plasterboard atboth edges.

Joint taped andfilled

12.5mm Shadowline ZStep SWZ12.5 securedthrough plasterboard totimber studs with LafargeTrim Head Screws

Shadowline Trim Reveal

Lafarge Profile Shadowline TrimReveals have one tapered fin forsmooth jointing to the plasterboardface; the other fin is square forbutting against a return face ortimber framing.

12.5mm ShadowlineTrim Reveal STR12.5secured throughplasterboard toCormet Metal Studswith Lafarge TrimHead Screws



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6

Application details

Shadowline Corner Steps

Lafarge Profile Shadowline CornerSteps extend the range and allowmore intricate edge details to beincorporated into walls, columnsand around ceiling recesses. Theyare available in double and quadstep configurations.

Shadowline QuadCorner Step SCS4secured throughplasterboard tometal supports

Cormet CeilingChannel

Cormet PrimaryChannel

Shadowline Trims

Lafarge Profile Shadowline EdgeTrim provides a neat edge to cutboard ends. Lafarge ProfileShadowline Flex Trim pre-cut edgetrim allows the creation of sharpcurved edges to a minimum radiusof 75mm.

Shadowline Double Corner Step SCS2forming an interesting partition end orsurround to an opening

25mm Shadowline FlexTrim STF25

25mm Shadowline EdgeTrim ST25

276



Application details

Softform ProfilesWithin the Lafarge range aresmoothly flowing profiles forcorners and bullnoses. They are aneconomical design solution forinherently safer and stronger cornertreatments.

Lafarge Softform Profiles are astylish solution to corner protectionin high traffic areas. The aluminiumalloy extrusion resists impacts betterthan conventional cornertreatments, and allows cornerprotection to be built-in to the wall,so removing the need for unsightlyexternally-applied protection.

Softform Corners

Lafarge Profile Softform Cornersallow partitions and wall linings tobe constructed with smooth curvedcorners. Both internal and external90º corners can be formed, and therobust Profile sections do notrequire any additional impactprotection.

In a 30 minute fire resistingpartition, the fire resistance can bemaintained at the curved corners bythe method shown.

Similarly, 60 minute fire resistancecan be maintained using anadditional layer of plasterboard, asshown.

Lafarge Profile Softform Corners canalso be used in many other wayswhere such smooth curved shapesare preferred, for example to createa recessed frame.

Additional Cormet MetalStuds to provide fixingpoints for SoftformInside Corner Profile

76mm radius SoftformOutside Corner securedthrough plasterboard tometal studs with LafargeTrim Head Screws

76mm radius SoftformOutside Corner SO76

76mm radius SoftformInside Corner SI76

Softform Corners: 30 minutes fire resistance

Softform Corners: 60 minutes fire resistance

Cormet U Tracksecured to bothend studs

Additional CormetMetal Stud secured toboth end studs toprovide support tocorner

76mm radiusSoftform OutsideCorner SO76

Cut strips of 12.5mmwallboard screwfixed to studwork tomaintain 30 minutesfire resistance

Cormet U Tracksecured to bothend studs

Cut strips of 12.5mmwallboard screwfixed to studwork tomaintain 60 minutesfire resistance

76mm radiusSoftform OutsideCorner SO76

Softform Outside Corner formingcurved corner to partition

Additional CormetMetal Stud secured toboth end studs toprovide support tocorner



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6

Application details

Softform Bullnose

The Lafarge Profile SoftformBullnose creates a smooth roundfinish to a partition end, and can beused for other features such as aprojecting bulkhead, shown here.

This detail also shows the use ofLafarge Profile Shadowline TrimReveals to form recessed joints atpartition junctions.

Softform Outside Cornersused to great effect tocreate a recessed frame

76mm radius Softform OutsideCorner SO76 screw-fixedthrough plasterboard to CormetMetal Studs

41mm radius SoftformBullnose SB75 screwfixed throughplasterboard toCormet Metal Studs

12.5mm ShadowlineTrim Reveal STR12.5fixed throughplasterboard toCormet Metal Studs

Softform Bullnose projectionon Cormet Metal Stud

Joints tapedand filled

278



Installation

Storage

Keep materials secure, covered andaway from sources of potentialdamage, such as high traffic areas.Store on a flat surface. Verticalstorage can cause end damage andwarping.

Installation

Lafarge Profiles can be used in walls,partitions and ceilings. They aredesigned for use with single ordouble layers of plasterboard ontimber, Cormet steel studwork, orwith Cormet metal furring channels.

Lafarge Profiles require no specialtechniques, however, considerationof their location during setting outwill reduce wastage, minimise thecutting, and enable the position ofany additional framing required tosupport the Profiles to bedetermined.

Framing centres must not exceed600mm. Additional support fromextra studs or fixing channel shouldbe provided at profile joint. Alwaysfully support cut edges ofplasterboards. A double layer ofdrylining will give greater rigidity.

Fixing

Install framing etc as required, andapply plasterboards. Referenceshould be made to BS 8212: 1995Code of practice for drylining andpartitioning using gypsumplasterboard.

For the Softform Bullnose, finish theplasterboard flush with the line ofthe stud.

For other Lafarge Profiles ensurethat the Cormet metal framesupports the profile fixing fins.

Always use a drop saw (fixed powersaw) or fine toothed hand saw withmetal cutting blade to cut LafargeProfiles. Lengths of profiles areusually butt jointed. Accuracy withcuts and mitres will ensure crispjointing. Alternatively, a smoothjoint can be achieved with SoftformProfiles by filing bevels on the cutends to form a shallow v-joint; fillwith fibreglass body putty and sandsmooth.

Test fit Lafarge Profiles, and screw-fix into the framing at all profilejoints and along their entire lengthwhere they cross studs or wherethey lie along the line of theframing, at 150mm centres.

Table 6.11 Softform Profiles selectorProfile number of 12.5mm Stud Stud position Profile

plasterboard size from apex radiuslayers (mm) (mm) (mm)

Softform Outside Corner 1 50 at apex 64

1 70 at apex 76

2 50 at apex 76

Softform Inside Corner 1 50 or 70 75 64

1 50 or 70 90 76

2 50 or 70 90 64

2 50 or 70 115 76

Softform Bullnose 1 50 – 41

1 70 – 52

Table 6.12 Profile fixings selectorPlasterboard layers Lafarge Trim Head Screw length (mm)and thickness (mm) Cormet Metal framing Timber framing

12.5 41 41

12.5 +12.5 41 57

15.0 41 41

15.0 + 15.0 41 57

Mitreing guide for Shadowline Reveals

T junction X junction

Corner T junction of Reveal with Trim Reveals



279

6

Installation

Finishing

Once all Lafarge Profiles have beenfixed, bed jointing tape withLafarge Fast Set jointing compoundalong the fixing fins, taking care toensure that the jointing tape doesnot overlap the shoulder of theprofile. Apply a finishing coat ofcompound 200mm (8in) wide usinga trowel. Run the trowel down thejoint, keeping its edge in contactwith the shoulder of the profile andwith the surface of the plasterboardto ensure a flush finish.

Clean off all jointing compoundsfrom the surface of the profiles. Donot allow the Shadowline HangingReveal (SHR12.5) to become blockedand ensure that the picture hangerswill be able to move freely inside it.

Sand smooth with 120 grit sandingpaper. Seal with Lafarge DrywallSealer or Lafarge Universal Sealerbefore decoration.

Decoration

Lafarge Profiles accept most types ofdecoration:

• emulsion or oil-based paints

• Stipples, enamels, texturedcoatings

• wallpapers

Matt finishes give the bestappearance.

Decoration should be carried out assoon as possible after the jointingcompound is thoroughly dry. Beforepainting it is important to equalisethe difference in absorptionbetween the plasterboard surface,the joint and the Lafarge Profile.Use one coat of Lafarge DrywallSealer to ensure uniformity ofcolour and texture over the entiresurface. A sealer coat is alsoessential before applying wallpaperor other wallcoverings so that thecovering can be removed forredecoration without damaging thewallboard surface.

When wall papering apply adhesiveright to the edge of the LafargeProfile, to avoid the possibility ofthe wallpaper peeling back.

Jointing method

Coat of jointcementfinished flush

Lafarge Jointing Tapebedded with LafargeFast Set jointingcompound along thefixing fin. Ensure thatLafarge Jointing Tapedoes not overlap theexposed Profile edge.

Table 6.13 Jointing compound selectorProduct Pack size Bedding Finishing

tapes joints

Fast Set 12.5 kg bag ✔ –

Deco Joint Filler 12.5 kg bag ✔ –

Rapid Sand 22.5 kg bag – ✔

Easy Finish 10 kg bag ✔ ✔

New Pure Velvet 25 kg bag – ✔

FineForm Mid-Weight 20 kg bucket – ✔

Readymix Lite 20 kg bucket – ✔

Deco Joint Cement 20 kg bucket – ✔

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Lafarge Profiles

Scope

Extra alternatives clauses requiredfor specifying Lafarge Profiles.partitions/linings to be fullyspecified as required.

Additional clauses





NBS clauses


To complete the clause select theappropriate data as indicated on theright.


Location…………………………………………Metal framing componentsFraming components to be hot dipped galvanised steel to BS EN 10143: 1993and BS EN 10142: 1990 and Approved Document A1: 1995 designated DX51Dand Z275 NAO. Sections rolled to BS 2994: 1987.

FramingProvide extra framing along lines of Profiles to support cut edges ofplasterboard and provide screw fixings of Profiles, all in accordance withLafarge Plasterboard’s instructions.

BoardingProvide extra layer of 12.5mm plasterboard to surfaces which are to receiveLafarge Profiles with boards cut away to suit, in accordance with LafargePlasterboard’s instructions. (This is required to maintain the performance ofthe system.)

Profiles (repeat as required)Lafarge Shadowline Profile ……… Type ……… Reference ………

Lafarge Softform Profile ……… Type ……… Reference ………

Mitreing/JointingMitre and cut Profiles with a bench fixed drop saw, or

Cut Profiles with a hacksaw.

FixingsLafarge Grabber Trim Head Screws

Length ……… mm at maximum 600mm centres fixed through taping fins ofProfiles and plasterboards into framing. (See Fixings in Section 8)

Taping and JointingBed joint tapes in Lafarge Joint Compound over Profiles taping fins. (Do nouse air drying compound for bedding tapes on Profiles.)

Bevel cut edges of Profiles at joins and mitres and fill with proprietary glassfibre/resin metal body putty. Sand smooth.

Cut Profiles accurately, neatly and butt joint.

Materials and InstallationAll materials unless otherwise indicated shall be supplied by Lafarge Plasterboard Ltd, and shall be installed in accordance with theircurrent literature and in accordance with BS 8212: 1995.

Finish joints with .......... (See Section 7 Finishing)

Notes:




C R E A T I V E S O L U T I O N SCONTOUR WALLS

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6

Curved wall surfaces, which oncerequired time-consuming wetplaster technology or expensivefibrous plaster mouldings, cannow be formed with quick andinexpensive Lafarge drywallsystems.

Utilising the drywall advantage itis now possible to create highquality curved plaster forms withLafarge standard wallboards andat the same time meet tight timeand cost restraints. Becausedrywall systems need no time todry out, following trades canproceed immediately, minimisingconstruction time and saving oncontract budgets.

282

C R E A T I V E S O L U T I O N SCONTOUR WALLS


Introduction

Contour WallsFor prestigious interiors, such asmultiplex cinemas, leisure complexesor luxury hotels, Lafarge drywallsystems provide new opportunitiesfor creating attractive andsophisticated three-dimensionalforms.

Because of its 6mm thickness –Lafarge Contour wallboard isflexible enough to create curveswithout the need for specialist toolsor site practices. Lafarge Contourwallboard can be used dry to formcurves with radii down to 1000mmor, when wetted, with a radius assmall as 600mm. Standardwallboards may also be curved ifwetted, achieving a range ofcurvatures depending on theirthickness, from 2000mm for 15mmthick plasterboard down to 1000mmfor 9.5mm thick wetted plasterboard.

Tight radius two-way curves can beachieved by using two layers ofLafarge Contour wallboard to formcomplex three-dimensional shapes,without any requirement forwetting. This technology enables allsitework to be carried out quicklyand economically, without the needfor expensive prefabricated fibrousplaster panels or messy and timeconsuming wet-plaster trades.

For installation details refer topage 153.

Tight radius two-waycurves are achieved onthis feature spiralstaircase by using twolayers Lafarge Contourwallboard to form acomplex three-dimensional shape,without any requirementfor wetting.

Visitors to this five starhotel are immediatelystruck by the towering 36metre high atrium. Eachfloor has a curvedwalkway and dadoheight balustradelooking onto theentrance area.

All the balustrades andassociated wall liningsare created using Lafargestandard wallboardsfixed to Cormet DrylinerChannels and CormetMetal Studs.

Installation of thesystems called forparticularly highstandards of precision insetting out and detailingto achieve the smooth,uninterrupted flow ofthe curving balustrades.


C R E A T I V E S O L U T I O N SWHAT CAN GO WRONG

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6

What can go wrong

Items to check

1. Is there a detailed dimensional layout for the Lafarge Fresco panels?

Careful planning and setting out can avoid wasting time and materials duringinstallation.

2. Have the position of fixtures such as electrical sockets been planned?

Fixtures, and items such as electrical socket outlets, switches, television andtelephone outlets should be positioned to fall within the flat surfaces of the panels.

3. Is horizontal framing provided for fixing the Lafarge Fresco panels?

The Fresco panels should be supported at all four edges.

4. Has Lafarge Firecheck wallboard been used as infill around the LafargeFresco panels?

Firecheck has the same performance as the Fresco Panels.

5. When using Lafarge wallboard with Lafarge Cove, is the wallboard squareedged with bound edges outward?

It is easier to achieve a neat, straight edge with bound edges rather than cut edges.

6. Has a 12.5mm wallboard been provided behind the Lafarge Profiles?

This is necessary where the fire and acoustic performance of the partition has to bemaintained.

Yes No Date completed

(✓ ) (✓ )

284



Case study

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