U value has an inverse relationship to r value.
Flat roof u value scotland.
Table 4 from 3rd october 2011.
Monitoring and improving scottish building regulations.
The target u values for building elements within existing buildings other than dwellings are shown below in table 4.
You can find our previous research reports in our website archive.
Where not exempt a conservatory heated or unheated should be built to the same maximum u values as any other new work as listed in columns b and c of the table in clause 6 2 9 with the exception that glazing and framing elements forming the walls or roof of a conservatory are unlimited in area and should have a maximum area weighted.
Check our library of roof u value calculations.
We provide u value calculations to show compliance with current building regulations standards and best practice.
The tables below show the suggested u values in england wales and scotland.
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.
For example scotland buildings will need a lower u value due to the colder weather than england.
The scottish technical handbook sets specific u values based upon the particular building element wall floor or roof.
These can be supported with a detailed report.
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.
Unsure what level of thermal performance you require.
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.
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.
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.
The easiest way of getting a u value calculation is by using our free online u value calculator.
U values are important because there are certain standards according to the building regulations and standards depending on location.
Wales can get away with having a higher u value than england and scotland because it is typically less cold.
2006 conventions for u value calculations.
Further guidance and u value adjustments can be found in br 443.
