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Enter your dimensions and get an estimated quantity for your job. Add a wastage allowance, then request a trade quote when you are ready.
Enter the area you need to insulate in square metres.
Browse the catalogue or send your list through for a trade quote.
Estimate the area or number of insulation boards, slabs and rolls needed for walls, floors, roofs and lofts. Enter the dimensions and the calculator adds a wastage allowance for cuts around openings.
30 m² pitched roof
Needs roughly 11 rigid insulation boards between the rafters.
20 m² solid floor
Needs about 7 boards of 2.4 m × 1.2 m insulation.
40 m² loft roll
Needs roughly 2–3 rolls depending on the roll width and thickness.
The calculator gives you a sensible starting quantity. For structural work, always confirm the specification and grade with your engineer or building control before ordering. We stock the standard trade lines and can source specialist grades or sizes with short lead times.
Working from drawings? Send us your dimensions, schedule or take-off and we will check the estimate, advise on the right product grade and wastage allowance, and book a delivery slot that matches your programme. We reply the same business day with a written trade quote.
Request a trade quote on the materials you have just calculated.