Question 1

How long do corrugated roof sheets last?

Accepted Answer

The lifespan of a corrugated roof sheet depends on the material it’s made from, and its environment. Galvanised or coated metal sheets typically last over 40 years. Bitumen corrugated sheets last around 15–20 years. Plastic or PVC sheets provide about 20 years of service, while fibre cement corrugated sheets can last up to 70 years with correct installation.

Question 2

How much should corrugated sheets overlap?

Accepted Answer

For proper weatherproofing, corrugated sheets should overlap by one and a half corrugations laterally. Vertical overlaps should be at least 150 mm on pitches above 10°. Shallow roofs may need larger overlaps. It's always best to check the manufacturer’s installation guide for site‑specific and material‑specific overlap recommendations.

Question 3

Do corrugated plastic sheets provide good UV protection?

Accepted Answer

Modern corrugated plastic and PVC sheets include UV‑resistant coatings to slow yellowing and brittleness. They allow in light for greenhouses, rooflights, and lean‑tos but can also protect against harmful UV rays. Over time, sun exposure may still reduce clarity - check the manufacturer’s warranty for long‑term UV performance and maintenance advice.

Question 4

Are fibre cement corrugated sheets safe to use?

Accepted Answer

Some builders ask about safety because older fibre cement products once contained asbestos. Modern fibre cement corrugated sheets are asbestos‑free and safe to handle when used correctly.

Question 5

Can you walk on corrugated plastic or bitumen sheets?

Accepted Answer

Walking directly on corrugated plastic or bitumen sheets is not recommended – they’re not designed for it and can crack or deform under load. Use crawling boards or roof ladders spanning multiple supports if access is unavoidable. Fibre cement sheets can also be fragile at fixings, so take care when carrying out maintenance.

Corrugated roofing sheets

Clear PVC Corrugated Roofing sheet (L)2m (W)950mm (T)0.8mm

930mm X 1000mm Corrapol-bt Brown Corrugated Bitumen Sheet

930mm X 1000mm Corrapol-bt Green Corrugated Bitumen Sheet

930mm X 1000mm Corrapol-bt Red Corrugated Bitumen Sheet

Onduline Red Bitumen Corrugated roofing sheet (L)2m (W)820mm (T)2.6mm

Clear PVC Corrugated Roofing sheet (L)3m (W)950mm (T)0.8mm

Onduline Green Bitumen Corrugated roofing sheet (L)2m (W)820mm (T)2.6mm

Onduline Black Bitumen Corrugated roofing sheet (L)2m (W)820mm (T)2.6mm

Corrapol-BT Corrugated Roofing Sheet 930mm x 2000mm / Green

Corrapol-BT Corrugated Roofing Sheet 930mm x 2000mm / Red

Onduline Classic Bitumen Roof Sheet 2000mm x 950mm x 3mm Black

Ariel Vistalux 3in Super Weight Corrugated PVC Sheet 6' X 1.3mm

Ariel Vistalux 3in Super Weight Corrugated PVC Sheet 8' X 1.3mm

Ariel Coroline Corrugated Roofing Sheet Black 2000x950mm

930mm X 1000mm Corrapol-bt Black Corrugated Bitumen Sheet

2.5m Corramet Corrugated Roof Sheet Kit Black

PVC Corrugated Sheet Clear 2.5m x 950mm 2.5m x 950mm

Corrapol-BT Corrugated Roofing Sheet 930mm x 2000mm / Black

3m Corramet Corrugated Roof Sheet Kit Black

Ariel Vistalux Heavy Duty Corrugated Roof Sheet 3050 x 762 x 1.10mm

Corozinc Galvanised Corrugated 8/3 Roof Sheet 660 x 2440 (609.6mm Cover)