Jul 05, 2016

If you require further help or advice on an already created U-value calculation and would like to speak with an advisor, please contact our Celotex Technical Centre on 01473 820850. Lines are open Monday – Friday, from 8.00am – 5.15pm. Celotex CW4000, being a non-melting thermoset material, may pass through cavity barriers so that a thermal bridge is avoided. Cavity obstructions Unavoidable projections into the cavity, such as floor edge beams and steel columns, need careful detailing and may require a horizontal cavity tray. 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). Information on the U-values and product solutions is available from the Celotex Technical Centre or by visiting celotex.co.uk. Extensions and conversions Building regulations state the U-value requirements of walls, floors and roofs when adding an extension to existing properties or carrying out conversion projects. 50mm Celotex GA4050’s low emissivity aluminum foil facing can help achieve lower U-values when installed facing a clear air space within a construction. This is a thermal insulation solution that can help achieve energy use and carbon dioxide emissions targets set by national building regulations. Celotex GA4000 insulation boards Celotex GA4000 uses. The Celotex GA4000 range is a range of general purpose PIR boards with thicknesses ranging from 50mm to 100mm. GA4000 is an incredibly versatile insulation board and can be used in a variety of applications. R value or 50mm polystyrene is 1.25. 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

For the purpose of U value calculations to determine if the requirements of the Building (or other statutory) Regulations are met, the thermal conductivity (90/90 lambda value) of the boards may be taken as declared within the Celotex BBA Certificate No. 94/3080 - CW4000 = 0.023 Wm1K 1

Celotex Crown-Fix flat roof PIR board for mechanically

Can I use 2 50mm sheets of celotex for my cold flat roof

Celotex Crown-Fix Mechanically Fixed Single Ply Flat Roof Board - NEW! Availability. Specialist Celotex Product, Crown-Fix is available in thickness’s between 50mm – 140mm from the manufacturer; lead-times apply to the following products: FX0050, FX0100, FX0110, FX0120 and FX0140 25mm Celotex v 50mm Expanded Polystyrene | DIYnot Forums Sep 03, 2019 celotex vs kingspan vs space age stuff | Screwfix Sep 30, 2007 Celotex CW4000 Cavity Wall Insulation Boards