Celotex Insulation

Celotex - a multi purpose insulation board uses include floors, pitched and flat roofs, solid masonry walls, timber framed and steel-framed buildings. Their light weight means minimal additioanl loading in any structure and are ideal for loft conversions and roof applications

Celotex insulation comes in thicknesses ranging from 12-150mm, but we normally stock these rigid insulation sheets from 20mm up to 100mm. Standard sheet sizes are 1200 mm wide by 2400mm long and are easy to cut and shape. Thicknesses over 30mm thick feature a core foam reinforced with glassfibre.

Celotex boards normally kept in stock include:

Celotex boards normally kept in stock include:

   ●  20mm Celotex (TB 3020) size 2400mm x 1200mm;
   ●  25mm Celotex (TB 3025) size 2400mm x 1200mm;
   ●  30mm Celotex (TB 3030) size 2400mm x 1200mm;
   ●  40mm Celotex (TB 3040) size 2400mm x 1200mm;
   ●  50mm Celotex (GA 3050) size 2400mm x 1200mm;
   ●  60mm Celotex (GA 3060) size 2400mm x 1200mm;
   ●  70mm Celotex (GA 3070) size 2400mm x 1200mm;
   ●  80mm Celotex (GA 3080) size 2400mm x 1200mm;
   ●  90mm Celotex (GA 3090) size 2400mm x 1200mm;
   ● 100mm Celotex (GA 3100) size 2400mm x 1200mm;
   ● 120mm Celotex (GA XR120)size 2400mm x 1200mm;


We also carry 45 metres of aluminium backed tape in 50mm, 75mm and 100mm widths for joining boards. Sometimes availability means we may offer Recticel branded insulation boards as an alternative.

For those who like the technical bits Celotex boards “feature low emissivity foil facings, GA3000 is manufactured from rigid polyisocyanurate (PIR) uniquely reinforced with glass fibre (except GA3100) using a blend of blowing agents that have zero ozone depletion potential (zero ODP) and a low global warming impact”.

Rigid insulation boards should be stored dry, flat and clear of the ground – care should also be taken not to damage corners or edges. Where possible the boards should be cut with a trimming knife rather than a saw to minimise the creation of dust.