| Sheet thickness and profile |
Compare the quoted thickness, corrugation or tile profile, and usable cover width rather than only the overall sheet size. |
Two sheets with the same length can cover different roof areas and carry different material costs. A deeper or heavier profile may cost more but can suit wider purlin spacing or tougher exposure. |
Ask: What is the usable cover width after side laps, and is the price based on overall width or installed coverage? |
| UV protection and surface layer |
Confirm whether the sheet has a UV-resistant surface layer, co-extruded construction, or other weathering treatment stated in the quotation. |
UPVC roofing sheets are used outdoors, so sunlight resistance affects color retention, brittleness, and long-term value. A lower initial price may reflect a simpler surface construction. |
Ask: What weathering or UV protection is included in this grade, and is it the same grade used for my project climate? |
| Sheet length, overlap, and waste |
Calculate the required cut lengths, end laps, side laps, ridge details, and offcut waste before comparing unit prices. |
A cheap per-sheet price can rise once extra sheets are needed for overlaps and cutting loss. Custom lengths may reduce waste but can change packing and handling costs. |
Ask: Can the sheets be supplied in lengths that match the roof slope, and how should I allow for end laps in the quantity? |
| Fixing system and accessories |
Include screws, sealing washers, caps, ridge pieces, flashings, and closure strips in the cost comparison. |
Roofing sheet price alone does not show the installed cost. The wrong screw or washer can also cause leaks, cracked sheets, or poor wind resistance. |
Ask: Which fastener type, washer material, and accessory list should be priced with these UPVC sheets for my roof structure? |
| Packing, transport, and site handling |
Check how sheets are packed, maximum bundle size, delivery method, and whether long sheets require special unloading. |
UPVC sheets can be bulky, and transport damage or awkward unloading can add cost even when the product price looks attractive. |
Ask: What packing is included in the quote, and what unloading equipment or handling space is needed on site? |