Estimate how much insulation your project needs and how many packs to order. Enter the application, material, dimensions and number of layers, and the calculator returns area, volume, unit and pack counts, plus fixings and adhesive.
Current UK guidance is around 270mm of mineral wool at ceiling level, usually laid in two crossed layers. If the loft is being converted to a habitable room, the insulation moves to the rafter line and a different build-up applies.
Rolls are cheaper and suit open joists and studwork. Rigid PIR boards give a better U-value per millimetre, so they win where depth is tight — floors, rafter lines and internal wall linings.
No. Thickness matters, but so does the material’s lambda value and, above all, the continuity of the layer. A well-installed thinner layer with no gaps often outperforms a thicker one full of gaps.
These tools give you a reliable starting figure. When you’re ready to turn it into a costed, fixed-scope proposal, our team works across London, Dubai and Cairo on architecture, interior design and turnkey delivery.
