SR35+
900mm cover width
PLAIN galvanised as standard, with polyester white or additional coatings available for added durability in aggressive environments.
Nationwide delivery
24 hour delivery
24 hour support
PLAIN OR COATED
SR35+ - Trapezoidal Roof Deck Profile
The SR35+ is ideal for roofing projects requiring a balance of strength, speed, and coverage. Its clean underside can remain exposed for an industrial aesthetic or finished with a polyester white coating for brighter interiors.
The sinusoidal profile is the industry standard for single-skin roofing. The 35mm depth delivers excellent spanning capability with minimal weight.
A wide range of finishes can be applied for enhanced performance or visual appeal, depending on project requirements.
Watch this short video for a quick explanation!
Strong Spanning Performance
With a 35mm profile depth and gauges of 0.7mm, 0.9mm and 1.2mm, SR35+ achieves dependable spans across typical purlin spacings. This reduces the need for additional secondary supports, delivering both programme and cost efficiency.
At 900mm cover width, SR35+ maximises sheet coverage per panel, reducing laying time and speeding up installation. Its lightweight design (depending on gauge) keeps handling simple on site, while maintaining robust strength under load.
Durability and Corrosion Protection
Supplied in hot-dip galvanised finish (Z275) or polyester-coated options, SR35+ provides excellent resistance against corrosion. This makes it suitable for a wide range of environments, from standard roofing projects to more demanding applications.
Simplified Fixing: End laps of 150mm with main fixings in every trough provide a straightforward and secure installation process.
With greater environmental sustainability, the D32s is recycleable - friendly.
Optimised Handling: With side laps not always essential and side supports at 450mm centres, installation is efficient and adaptable.
Length Flexibility: Supplied in lengths of up to 12m, reducing joints and speeding up programme delivery.
Speed: Straightforward fixing every trough, end lap 150mm, intermediate fasteners in alternate troughs. Fast installation, lower labour costs.
DESIGNED FOR LARGE SCALE
CONSTRUCTION PROJECTS
Features
Cover Width
900mm
Depth
35mm
Pitch (Wave)
150mm
Crown Height
70mm
Valley Height
43mm
Maximum Length
12m
Available Gauges & Coatings
Standard thickness options in S350 high-yield steel
0.7mm
Galvanised Z275: 7.58 kg/m²
Polyester Z150: 7.43 kg/m²
0.9mm
Galvanised Z275: 9.76 kg/m²
Polyester Z150: 9.61 kg/m²
1.2mm
Galvanised Z275: 13.03 kg/m²
Polyester Z150: 12.88 kg/m²
Coatings & Fire Rating
Galvanised Z275: 275g/m² coating, 25+ year service in most UK environments, corrosion protection
Polyester White Z150: 150g/m² coating, aesthetic finish, Class 1 / Class 0 fire rated (upon specification)
Fire Rating: Class 1 standard; Class 0 available (consult design team)
Benefits
Proven system: The sinusoidal profile is the industry standard for single-skin roofing. The 35mm depth delivers excellent spanning capability with minimal weight.
Flexibility: 900mm cover width and multiple gauge options mean you specify exactly what your structure needs — no over-engineering, no waste.
Durability: Galvanised or polyester coating options. Z275 galvanising provides 25+ year service in most UK environments. Class 1 / Class 0 fire rating meets building regulations.
Cost-effective: The SR35+ delivers strength-to-weight performance at the right price point for agricultural, industrial and commercial projects.
Applications
Agricultural
Livestock sheds, grain storage, polytunnels, open-sided structures.
Industrial
Factories, warehouses, workshops, loading canopies.
Commercial
Retail canopies, car ports, garden centres, nurseries.
Technical
Spanning & Load Capability
Typical span range: 1.2m to 2.8m (dependent on gauge, load and deflection limit)
Deflection limits: Span/200 for permanent loads (strict), Span/90 for combined permanent + variable.
Design factor: 1.5 on yield (building regulations compliance)
Bearing: Minimum 60mm on supports (prevent trough crushing)
Fixing & Lap Details
Fixing: Fastener every trough (not every crown). Stainless or galvanised fasteners; sealant washers where required for water management.
End lap: 150mm minimum (two trough intervals). Allow for building movement
Intermediate fasteners: Every alternate trough on intermediate supports for multi-span roofs.
Side lap: Not essential for single-skin, but recommended in high-wind or high-moisture environments.
Side support spacing: Maximum 450mm centre-to-centre on the edges of the roof.
Sealant: Polyurethane or silicone – situational. Consult our technical team for your environment.
ENQUIRY HERE
9 Gaol Lane, Sudbury, Suffolk, CO10 1JL
Monday - Friday 7.30am - 4.00pm
Saturday - Sunday - CLOSED