How-to-install-celotex-roof-insulation, the celotex handy guide is an essential tool that includes invaluable features such as easy-to-use ready reckoners, extensive u-value calculations, detailed illustrations and clear installation guidelines.. Login to the celotex members' area for a range of specification tools, making specifying celotex easy! register to gain access to our comprehensive technical library which contains helpful specification tools, including the popular celotex u-value calculator, thermal bridging models, bim objects and much, much more., celotex is suitable for a pitched roof which can then join with a horizontal ceiling. the insulation amounts you mention will not meet building regulation compliance so perhaps you can call the technical department on 01473 820850 to discuss your specific requirements..
How to insulate your loft. things to consider. when insulating a loft, a number of possible options exist with the following proving popular in both the new build and refurb arena: insulating a pitched roof (unventilated – breather membrane over rafters)