What is Celotex TB4030? They are all multi-purpose insulation boards developed to provide simple solutions for overcoming localised thermal bridges and can boast a lifespan of 60 years. The thermal board is a universal high-performance insulation that can be used for pitched roofs, flat roofs, timber frame walls, floors, room-in-the-roof applications and ceilings. It is suitable for both new build and renovations and comes in a wide range of sizes from 12mm all the way up to 200mm. Celotex TB4030 is also moisture-resistant, which aids its performance. With low emissivity foil facings these thermal boards are manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has zero ozone depletion potential (zero ODP) and low global warming potential (GWP). What is PIR insulation? The TB4030 boards are polyisocyanurate, which means they are a rigid and lightweight structure. This helps with transporting the boards and improving the handling and fitting of the boards. General info • BBE certified with a high-standard, sustainable manufacturing process. • BRE Green Guide Rating of A. The Celotex TB4000 boards have been deemed a Euroclass E Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission. Celotex PIR boards come in three different ranges depending on the thickness. 12mm-45mm fall into the  TB4000  range, 50mm - 10mm fall into the  GA4000  range and 110mm to 200mm fall into the  XR4000  range. They are all multi-purpose insulation boards developed to provide simple solutions for overcoming localised thermal bridges. For any tips or assistance using this product please call our sales team on 01628 249 058.