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.
Flat roof u value scotland.
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.
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.
Unsure what level of thermal performance you require.
These can be supported with a detailed report.
Check out our guide on what performance is required for the uk insulation building regulations.
We provide u value calculations to show compliance with current building regulations standards and best practice.
The easiest way of getting a u value calculation is by using our free online u value calculator.
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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.
U values are important because there are certain standards according to the building regulations and standards depending on location.
The target u values for building elements within existing buildings other than dwellings are shown below in table 4.
For example scotland buildings will need a lower u value due to the colder weather than england.
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 our library of roof u value calculations.
The tables below show the suggested u values in england wales and scotland.
U value has an inverse relationship to r value.
Further guidance and u value adjustments can be found in br 443.
You can find our previous research reports in our website archive.
Flat epdm roof description.
Monitoring and improving scottish building regulations.
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.
Table 4 from 3rd october 2011.
