IMPORTANT: On 1 September 2017, Celotex took the precautionary measure to temporarily suspend the supply of Celotex FR5000, Celotex CG5000, Celotex CF5000 and Celotex SL5000 while we investigate the results of recent tests (Parts 6 and 7 of British Standard 476). Materials relating to these products are for information only.

The map and chart show each region of the U.S., the subsequent zones and corresponding R-values. R-value Insulation Chart Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic, walls, floors and crawlspaces. U-value is the most common measure and it incorporates the thermal conductance of a structure along with heat transfer due to convection and radiation. For all building constructions there is a maximal admissible thermal transmittance, which indicates the amount of heat flow in watts per square meter of construction with the temperature 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 CF5000 features a super low lambda of 0.021 W/mK helping you achieve compliance to UK building regulations and a U-value within the wall of 0.18 W/m2K. CF5000 has been mechanically engineered with a rebated edge to eliminate the passage of moisture.

The Celotex XR4000 Insulation Board enables lower U-Values with a single layer of insulation. The product comes in various thicknesses and is designed to help meet current and future build regulations and carbon reduction programmes.

Celotex Technical Centre: 01473 820850 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 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.

The Celotex U-value Calculator is one of the most comprehensive online calculators in the industry and is used by thousands of small to large architects and specifiers all over the country. So for this reason we have we have just made this bigger and better for our users to improve your experience.

Celotex with lambda values as low as 0.021W/mK achieve better U-values and thinner solutions preventing heat loss and maximising thermal performance. With a premium range including ‘best in class’ product solutions for pitched and fl at roofs, walls and fl oors Celotex will continue to help meet the requirements of Building Regulations. SuperQuilt is proven to save cost, space, wastage & installation time compared to Rigid PIR Insula tion (Kingspan / Celotex) Require a U-value document for building control? Visit our free & easy to use Online U-value Calculator. Receive instant solutions in less than 60 seconds! Click Here to Use! import_contacts See Full Guide U-Value. Now you have your Rt value, the calculation is simple, one divided by the Rt. There you have your U-Value. Other helpful bits: U-Value guide BRE Guide to U-Values. One of our readers, Brian, has very kindly provided access to the U-Value calculations of a live project so that you can get a feel for what is involved.