Dry lining The Dot and Dab
Method The application of
plasterboard has dramatically changed over the last 10 years in the construction industry.
Traditional methods of two-coat work on walls are gradually being overtaken by the system of dabbing plasterboards to walls
Dry lining The problem with the
traditional methods of two-coat work has been the setting time for the wet materials that has led to a delay in the completion of the buildings.
So to speed up, construction, manufacturers designed various dry lining systems that can be installed quickly and covered with plasterboard.
Dry lining Gyproc dry liner basic system Most widely used method to dry line masonry
walls. Main application is new-build housing sector. Suitable for most Gyproc plasterboards and
thermal laminates.
Dry lining Advantages of dabbing plasterboards to
walls Suitable to be applied to most backgrounds. Quick to install. Fire protection. Speeds up drying time. Reduces amount of mixing required. Suitable for both new and refurbishment
work.
Dry lining To meet the requirements
of the industry, plastering manufactures have produced a number of specialist systems:
Thermal qualities. Moisture resistant. Fire. Insulation. Sound. .
Dry lining The most important
activity when dabbing boards is setting out the vertical centre lines for application of the bonding compound
Dry liningTools and equipment
required Measuring tape. Level. Straight-edge. Gauge rod. Plumb line. Foot lift
Question Dabs of bonding adhesive for fixing plasterboard should be
no thicker than: a 10 mm b 15 mm c 20 mm d 25 mm Answer
d 25 mm
Dry lining Fixing the boards in
place Plasterboards are
then tamped back to setting out lines at floor and ceiling with a straightedge ensuring a good strong bond between board and background.
Add 10 mm on high spot for thickness of dab. Snap chalk lines.
Transfer lines down to floor.
Set out boards from internal angle
Set out end of boards and centre of boards
Dry lining Previously fixed plasterboard
fit next board close tight and level
Apply continuous dabs of bonding compound to the perimeters
Dry lining Use a foot lift to place
the board in position. Using a straight edge tamp the board back to the setting out lines at the floor and ceiling.
The total area of contact between bonding adhesive and the plasterboard should not be less than 20% of the plasterboard area.
Dry lining Total area of
contact between bonding compound/adhesive and plasterboards should not be less than 20% of plasterboard area.
Dry lining Checking for
alignment and full bonding
Tap the boards firmly using a straight-edge until it lines in with the ceiling and floor lines.
Question Name the tools and equipment for dry
lining Answer Tools and equipment required Measuring tape. Level. Straight-edge. Gauge rod. Plumb line. Foot lift
Question What should be the Total area of
contact between bonding compound/adhesive and plasterboards
Answer should not be less than 20% of
plasterboard area.
Task 1 1 Name three tools used for fixing plasterboard for
direct bond. 2 List two thicknesses and widths of plasterboard used
in direct bond. 3 What type of plasterboard is best for direct bond?
Answers
1 Name three tools used for fixing plasterboard for direct bond.
Any three of the following hawk, trowel, straight edge, spirit level, foot lifter, chalk line
2 List two thicknesses and widths of plasterboard used in direct bond.
thickness: 9.5 mm and 12.5 mm, width: 900 mm and 1200 mm
3 What type of plasterboard is best for direct bond? The best type of plasterboard for direct bond is
tapered-edged plasterboard.
Dry lining Apply dabs for the next
board and continue along the wall.
At internal angles cut the board to size and place the cut edge to the angle.
At external angles apply adhesive dabs close to the angle on each side.
At windows apply a continuous line of dabs.
Dry lining Points to remember
when fixing boards to walls.
Always ensure you have applied sufficient dabs in a regular pattern.
When working round services ensure a continuous fillet of adhesive is applied around the whole area.
Dry lining Ensure the background
clean dry and dust free. Always ensure a band
of adhesives applied at skirting level to provide good fixing for skirting boards.
Remember the boards used may be tapered edge boards which means they will not be plastered – keep the finished surface free from adhesive.
Dry lining Knauf Joint Tape Perforated white
tape for reinforcing joints by hand or machine application
Dry lining Knauf corner
tape • Paper tape
strengthened with two metallic strips, used on external angles.
• Easy to apply corner protection.
Dry lining Knauf Fibre Tape Multi-purpose
self-adhesive tape for reinforcing joints and patch repairs to plasterboard.
Dry lining Knauf Joint
Cement Easy Sand
A lightweight air-drying compound for bedding tapes and finishing joints by hand or machine application
Dry lining Knauf Ready Mix
Lite Easy Sand A pre-mixed light
joint cement for bedding tapes and finishing joints with superior sanding characteristics for hand or machine application
Task 2 4 Name two different types of jointing material. 5 To produce the best results with jointing material what
should you avoid within the material? 6 Name two types of reinforcement used on plasterboard
joints in direct bond. 7 Name two types of reinforcement used on external
angles in direct bond. 8 The background for direct bond should be of what
quality and why? 9 Dabs of bonding adhesive for fixing plasterboard should
be no thicker than: a 10 mm b 15 mm c 20 mm d 25 mm
Answers 4 Name two different types of jointing material. setting material, air-dry material
5 To produce the best results with jointing material what should you avoid within the material?
Jointing material should be mixed to a smooth paste with no lumps or set hard pieces of jointing material.
6 Name two types of reinforcement used on plasterboard joints in direct bond.
two types of joint tape: paper tape and self-adhesive glass fibre mesh
Answers 7 Name two types of reinforcement used on external
angles in direct bond. reinforced paper corner tape, drywall metal beads
8 The background for direct bond should be of what quality and why?
The background for direct bond should be of good quality and level, because if the adhesive used to fix the boards is too thick it will not hold the boards securely back to the background.
Answers 9 Dabs of bonding adhesive for fixing plasterboard
should be no thicker than: a 10 mm b 15 mm c 20 mm d 25 mm
Soundproofing Solutions to Meet New Part E Building RegulationsCustom Audio Designs now offers Sound Testing!! Call for Details.INTERNAL WALLS / PARTITIONS
UNDER PART E:- The internal wall requirement for the new Part E Regulations is 40
RwdB.
An internal wall is defined as a wall between a bedroom or room containing a W.C. and other rooms.
There is no Part E requirement for an internal wall that contains a door.
Internal walls are not subject to pre-completion testing. With internal wall applications there is no Ctr adjusting factor required
under Part
Dry lining Knauf joint tape Pre-creased tape used to increase the
resistance to cracking of flat joints and internal angles.
Knauf fibre tape Self-adhesive glass fibre mesh tape used as
an alternative to joint tape. Knauf corner tape Paper tape strengthened with two metallic
strips, used on external angles. Easy to apply corner protection.
Question What should the total area of
contact between the bonding adhesive and the plasterboard be ?
Answer The total area of contact between
bonding adhesive and the plasterboard should not be less than 20% of the plasterboard area
Question Which tool is used to lift the
plasterboard into position on the wall
Answer A foot lifter is used to lift the board into
position
Dry lining Apply jointing tape and cover with first coat of joint cement using broad knife or trowel feathering out each application
Task 3 On page 232 answer question 11 In your own word describe how to dry line a wall, and what
materials you would use Read page 185 and in your own word describe the setting out
procedure Name three types of dry lining tape Answer Knauf joint tape Knauf fibre tape Knauf corner tape
Question Name three types of tape used for
dry lining Answer Knauf joint tape Knauf fibre tape Knauf corner tape
Dry lining Knauf Joint Cement Easy Sand
A multi-purpose gypsum-based adhesive for use with Knauf Metal Furring Channel and for direct bonding of Knauf Plasterboards and Insulating Laminates. Should not be used for moisture resistant boards or vapour check boards.
Dry lining Knauf Ready Mix
Joint Cement An air-drying pre-
mixed jointing compound for bedding tapes and finishing joints by hand or machine application.
Fixing Plasterboard to Metal Stud Partitions
A common partition wall system now seen on site is the Metal Stud the advantages of this
method are of: • Lightweight non-load bearing. • Quick assembly. • User friendly. • Can be relocated.
Fixing Plasterboard to Metal Stud Partitions A tradesman classed, as an interior fixer
would generally construct the metal this being a dry trade area, more associated with a joiner's role.
The plasterer’s skills come in place with the fixing of the boards and the plastering and/or taping and filling of the boards.
Fixing Plasterboard to Metal Stud Partitions Basic procedure for fixing to metal stud Cut and measure the boards as you would
fixing to timber backgrounds. Use dry wall screws to fi x the boards using a
screw gun is an ideal tool. Fix screws at 300mm centres. Use battery operated drills no trailing of leads
and easy movement around the partitions. Ensure services fi xed to sections of studding. Cut boards accurately around services to
avoid cracks appearing.
Fixing Plasterboard to Metal Stud Partitions
Fixing Boards to Metal Stud
Quicker to build than timber partitions.
Improved sound insulation.
Will not twist or shrink.
Basic tools required. Easy to cut.
Fixing Plasterboard to Metal Stud Partitions
Fixing the drywall screws into the metal stud using a cordless drill
Using a foot lift to hold the board in position
Fixing Plasterboard to Metal Stud Partitions Fixing the plasterboards to a studded
wall is very similar to that of fixing to a ceiling.
Start from the internal corner and work your way to the external angles.
If the plasterboards exceed the height of the studding cut the board to length and this will leave only vertical joints to tape.
Fixing Plasterboard to Metal Stud Partitions
Using a foot lift help position boards 2400mm in length to fit to the ceiling
Fixing Plasterboard to Metal Stud Partitions
Using the electric box as a guide mark out the position