Just had a flat roof converted to a pitched tiled roof and planned to insulate with kingspan. I was going to fill the joists with 150mm as they are over 150mm deep but builder recommended 100mm between ceiling joists and 50mm on top of that. The reason for this he said is the wooden joists act as a thermal break. Buying 100mm plus 50mm works out quite a bit dearer than getting 150mm would there really be that much difference.
Where is the cheapest place to buy kingspan, tried local builders merchants,ebay etc,cheapest I could find is £47 for the 150mm there any cheap online stores or does anyone have any they wish to sell.
Where is the cheapest place to buy kingspan, tried local builders merchants,ebay etc,cheapest I could find is £47 for the 150mm there any cheap online stores or does anyone have any they wish to sell.