Cold Deck Flat Roof U Value

For more information see our articles and how to videos below. Flat roof u value 0 18 w m2k 2 warm deck flat roof the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. Providing you with instant calculations all day everyday with step by step options and hints and tips along the way the no jargon u value calculator takes you through your construction build up until each element is included.

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We provide u value calculations to show compliance with current building regulations standards and best practice.

Cold deck flat roof u value.

These can be supported with a detailed report. U value has an inverse relationship to r value. For example a building with material with an r value of r 11 converts to an u value of 0 09 1 r or 1 11 0 09. U value of a flat roof.

The easiest way of getting a u value calculation is by using our free online u value calculator. To comply with part l of the building regulations 2010 all roofs to rooms except those in unheated buildings should be thermally insulated to a maximum u value of of 0 18 w m k. Reference table for u values u value is the coefficient of transmission i e the transmission of heat through the materials which compose the building s envelope or outer shell. A lower u value indicates better insulation properties hence u value requirements usually specify a maximum value.

This is placed over the roof joists and a board normally external ply is laid on top. Thickness varies according to the manufacturer s specifications. Cold deck flat roof 0 18w m2k new double glazed 12mm gap 1 80w m2k cold deck flat roof 0 58w m2k existing bathroom with 75mm rockwool new build u values. This is known as a cold roof because the roof deck and roof space are close to the external air temperature.

The epdm rubber roof membrane is then installed using the contact adhesive onto the deck. Ecotherm s u value calculator is simple to use easy to tweak and provides an instant u value. The new build u insulation values have been taken from manufactures catalogues. The 18mm roof grade deck is then fixed on top of the rafters leaving suitable air flow between the insulation and the deck.

Ground bearing slab 0 16w m2k with 100 thick insulation p a 1 15.