U-value Calculator for Insulation Specification - Celotex

Insulation Material Thermal Conductivity Chart | Engineers Various Insulation Material Thermal Conductivity Chart R-values per inch given in SI and Imperial units (Typical values are approximations, based on the average of available results. Ranges are marked with 25mm insulation for Sale | Gumtree Celotex Insulation boards 25mm, 40mm, 50mm, 60mm, 70mm, 75mm, 80mm, 90 Cobham, Surrey All boards are foiled both sides and branded. Delivery can be arranged depending on quanties and distance at an additional charge. Varies sizes avalible some of which aren't listed. 25mm celotex 1200x2400 sheets Foiled back £12each 50mm celot Which Rigid Insulation Should I Choose? - Fine Homebuilding May 01, 2009

Loft Insulation - An introduction | TheGreenAge

The Celotex Handy Guide

OSB vs. Celotex sheathing - Fine Homebuilding

Polyisocyanurate - Wikipedia Polyisocyanurate, also referred to as PIR, polyiso, or ISO, is a thermoset plastic typically produced as a foam and used as rigid thermal insulation. The starting materials are similar to those used in polyurethane (PUR) except that the proportion of methylene diphenyl diisocyanate (MDI) is higher and a polyester-derived polyol is used in the reaction instead of a polyether polyol. Using 50mm polystyrene instead of 50mm Celotex for R value of 50mm Celotex is 2.25. It has to be noted that over 7-10 years Celotex will drop in R-value to match the polystyrene as polystyrene will not drop. Wickes supply 50mmx1200mmx2400mm polystyrene @ £14-56 per sheet (2.16KG per board average density) Wickes supply 50mmx1200mmx2400mm Celotex @ £22-78 per sheet 2.45KG per board.