#PerfectRoof: Specifying Hard Metals

Simon Walker, Category Manager, SIG Zinc & Copper

#PerfectRoof

Why specify hard metals?

Long life span due to natural

patina formation

Maintenance free

Low weight between

3.85 – 7.2kg/m2

Zinc and copper are essential and

naturally found elements

Excellent BREEAM credentials

Dramatic visual impact

#PerfectRoof

Issues to be aware of

High capital cost

Compatibility issues (Copper)

Vapour control layer specification

Hard to retro fit penetrations

Limited design standards

Specifiers confused by range

of market offers

Varying product quality

Conflicting advice from

manufacturers

#PerfectRoof

Establishing the client’s brief

PatinaCost

Buildability

BREEAM

Theft

Maintenance

Life

expectancy

Procurement

Compatibility

Guarantees

Aesthetics

Facade

Roofing

#PerfectRoof

Roofing build up

Cold roof construction

Most common construction method

Ventilated cavity below substrate

Ventilated eaves and ridge required

Warm roof construction

Thinner overall construction

Non-ventilated details such as eaves and ridge

Particular attention to be paid to VCL and high

humidity buildings

Substrates include: rigid insulation, SIPS and

composite panels

#PerfectRoof

Traditional façade methods

#PerfectRoof

Flat lock / shingle system

Durable, light-weight and low

maintenance construction

Shingles can be set in various

orientations and in different geometric

shapes

Usually built in vented façade

construction

Traditional façade methods

#PerfectRoof

Panel system

Commonly used to clad soffits

Reasonable cost

Easy installation

Formal and ordered appearance

Traditional façade methods

#PerfectRoof

Angle standing seam

Durable, light-weight and requires

virtually no maintenance

Multiple design possibilities

Usually built in ventilated façade

construction

Engineered façades

#PerfectRoof

Thin gauge materials reduces metal

requirement and cost per m2

Large format panel with exceptional

flatness

Dimensionally variable panel thickness,

width and length

Individually demountable panels

The system can be installed on to all

wall constructions e.g. SFS, SIPS,

Block, Brick

Traditional façade joint methods

#PerfectRoof

Angle seam joint

Traditional or longitudinal joint

Finished with a 90o instead of 180o

Joint is more stable resulting in a straighter seam

Metal is not stressed producing flatter trays

Transversal joint

Flat lock joint that forms a small 5mm ‘jump’ in the face of

the trays

Not as noticeable as the standing seam

Formed by making a 180o fold along each end of the trays

Flat lock joint

Formed by making a 180o fold along the perimeter of each shingle

Hidden fixings makes this suitable for flat and curved façades

Can accommodate different geometric shapes

Benefits of using zinc

#PerfectRoof

100% recyclable

Zinc titanium production and

use has a negligible impact on

the environment

Excellent BREEAM credentials

Particularly suitable for marine

environment

Benefits of using copper

#PerfectRoof

Natural tint

Subtle shades

Easy to form

Environmentally friendly

Corrosion resistance

Benefits of using stainless steel

#PerfectRoof

Extremely corrosion resistant

High strength resistance

Has a longer life expectancy of

up to 80 years

Excellent cost versus quality

price ratio

Choosing your supplier

#PerfectRoof

Range of materials and finishes

Materials cut to length with no waste

Choosing the right product for the project

Correct design first time

No upfront design fees

Full guarantees

Professional Indemnity

insured

Cut the cost of metal roofing

and cladding

#PerfectRoof

• Bespoke coils widths with

no waste

Savings by supplying

actual materials required

Non-standard sizes now

available cut to exact

length

UK hard metal fabrication

service

Precise quantities

available for small or

large projects

#PerfectRoof

Thank you!