PVC Corrugated Roofing Sheets
Polycarbonate Corrugated Roofing Sheets
Our 4mm twin-wall polycarbonate sheets are lightweight, yet with high-impact strength and superior thermal insulation. They are excellent for outdoor applications such as greenhouses and cold frames. Our data sheets can provide you with additional information on this product.
Twin-wall and Multiwall polycarbonate sheets are UV-protected, but only on one side! Look for the protective film with writing on it — this is the UV-protected side and should face the sun. The other side has no UV coating and should face away.
This material range is Class 1 Fire Rating BS476/7.
| Product | Shading Coefficient | Light Transmission | U Value W/m2K | Weight (KG) | Number of Walls |
|---|---|---|---|---|---|
| 4mm Clear | 0.75 | 82% | 3.8 | 0.8 | Twin Box |
Material is available in cut-to size – subject to +/- 5mm cutting tolerance
We will always endeavour to keep to your measurements however We cannot guarantee where the blade lands when cutting the sheets, so it is not possible to ensure hard edges on all panels.
Product colour tints subject to manufacturers production tolerances
Brands / Suppliers vary due to stock and availability
Please store and lay this material flat in a cool, dry place prior to installation.
Polycarbonate is 250 times stronger than glass and is often said to be virtually unbreakable. It is an incredibly durable material with high impact strength yet remains lightweight and easy to work with.
Polycarbonate can last upwards of 10 years if it is properly installed and well looked after. In some cases, it has been known to last for 20 years or more.
![1.5mm Clear Palsun™ Polycarbonate Standard Sheet [UV1]](https://www.thepolycarbonatestore.co.uk/wp-content/uploads/2026/02/PALSUN_Clear_3mm_Zoom1-768x527.jpg)
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