The target u values for building elements within existing buildings other than dwellings are shown below in table 4.
Flat roof u value scotland.
These can be supported with a detailed report.
Epdm rubber roof covering 19mm ply 50mm ventilated air layer protect vp400 plus lr membrane sip at specified thickness protect vc foil ultra insulating a vcl 25mm service void 50mm gyproc thermaline super.
Flat epdm roof description.
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The easiest way of getting a u value calculation is by using our free online u value calculator.
For more information see our articles and how to videos below.
The required u value will depend on the location of the project england scotland or wales type of building domestic or non domestic and the application floor wall or roof.
Check out our guide on what performance is required for the uk insulation building regulations.
Table 4 from 3rd october 2011.
U value has an inverse relationship to r value.
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.
Amendments to the building regulations and to the building standards system are made to ensure the aims of the system continue to be met and that the system meets the needs of the people of scotland.
The scottish technical handbook sets specific u values based upon the particular building element wall floor or roof.
For example scotland buildings will need a lower u value due to the colder weather than england.
2006 conventions for u value calculations.
U values of glazing elements forming the roof are usually quoted in the vertical plane and should therefore be adjusted allowing for the angle of the roof.
U values are important because there are certain standards according to the building regulations and standards depending on location.
Unsure what level of thermal performance you require.
Further guidance and u value adjustments can be found in br 443.
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.
The tables below show the suggested u values in england wales and scotland.
Wales can get away with having a higher u value than england and scotland because it is typically less cold.
These are expressed as a u value which needs to be achieved.
Monitoring and improving scottish building regulations.
