50mm Celotex GA4050 is a multi-purpose insulation board that provides solution to overcome from the localized thermal bridges problem. Featuring a low emissivity foil facings, this board has been manufactured from tough polyisocyanurate (PIR) by using a perfect mix of certain blowing agents which acquires zero ozone depletion potential (zero ODP) and a low global warming impact (GWP).

Celotex Technical Centre: 01473 820850 celotex.co.uk Physical Properties Method GA4000 Compressive strength BS EN 826 ≥140kPa Dimensional stability BS EN 1604 DS(TH)8 Water vapour resistance BS EN 12086: Method B >150 MNs/g Thermal conductivity BS EN 12667 0.022 W/mK Surface spread of flame BS 476-7 Class 1 Typical U-values Celotex Technical Centre: 01473 820850 celotex.co.uk Physical Properties (*insulation only) Method GS5000 Compressive strength* BS EN 826 ≥120kPa Dimensional stability* BS EN 1604 DS(TH)8 Thermal conductivity* BS EN 12667 0.021W/mK Fire resistance BS EN 13501-1 Euroclass B-s1,d0 Typical U-values U-values will vary depending on application. 1980: In the U.S. in the 1980's Celotex Thermax insulating board was described by the Celotex Company (Jim Walters corporation, Tampa) as an insulating sheathing board with an R-value of 5.4 for a 3/4" thick board: higher R than its competitors at the time as it was compared with foam insulating board sold by Dow, WR Grade and Simplex You are being redirected. 100mm Celotex GA4100 is a multi-purpose insulation board that provides solution to overcome from the localized thermal bridges problem. Featuring a low emissivity foil facings, this board has been manufactured from tough polyisocyanurate (PIR) by using a perfect mix of certain blowing agents which acquires zero ozone depletion potential (zero ODP) and a low global warming impact (GWP). Guidance on the U-values and product solutions for complying with Building Regulations is available from the Celotex Technical Centre or by visiting celotex.co.uk. Extensions & Conversions Building Regulations state the U-value requirements of walls, floors and roofs when adding an extension to existing properties or carrying out conversion R-Value: 1.8m2K/W Surface Spread of Flame : Class 1 Celotex TB4040 is targeted at cut-to-fit applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible.

Celotex GA4000 is a general purpose insulation board for floors, walls and roofs. It has long been at the heart of the Celotex product range providing the user with a range of thermal insulation solutions.

1980: In the U.S. in the 1980's Celotex Thermax insulating board was described by the Celotex Company (Jim Walters corporation, Tampa) as an insulating sheathing board with an R-value of 5.4 for a 3/4" thick board: higher R than its competitors at the time as it was compared with foam insulating board sold by Dow, WR Grade and Simplex

Celotex Technical Centre: 01473 820850 celotex.co.uk Physical Properties Method GA4000 Compressive strength BS EN 826 ≥140kPa Dimensional stability BS EN 1604 DS(TH)8 Water vapour resistance BS EN 12086: Method B >150 MNs/g Thermal conductivity BS EN 12667 0.022 W/mK Surface spread of flame BS 476-7 Class 1 Typical U-values

Guidance on the U-values and product solutions for complying with Building Regulations is available from the Celotex Technical Centre or by visiting celotex.co.uk. Extensions & Conversions Building Regulations state the U-value requirements of walls, floors and roofs when adding an extension to existing properties or carrying out conversion R-Value: 1.8m2K/W Surface Spread of Flame : Class 1 Celotex TB4040 is targeted at cut-to-fit applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. U-values (by measurement or calculation according to the standards given in Section 0) should be used in preference to the data given in these tables. TABLES OF U-VALUES Table A1 Indicative U-values (W/m2·K) for windows and rooflights with wood or PVC-U frames, and doors Gap between panes Adjustment 6mm 12mm 16mm for rooflights or more in Celotex U values U values measure how well a material performs as an insulator. The U value of a product varies widely depending on where the product is used, the materials around the Celotex insulation and more, for example the Celotex 50mm U value will vary according to the type of Celotex board being used, and where it is installed. U-values - Designing Buildings Wiki - Share your construction industry knowledge. U-values (sometimes referred to as heat transfer coefficients or thermal transmittances) are used to measure how effective elements of a building's fabric are as insulators. That is, how effective they are at preventing heat from transmitting between the inside and the outside of a building.