U values designing buildings wiki share your construction industry knowledge.
Roof u value building regs.
For example scotland buildings will need a lower u value due to the colder weather than england.
These figures are the notional dwelling specification to demonstrate compliance as the regulations do allow a slightly worse performance of one component if it is compensated by better performance of another.
The area weighted average u values used in the notional building specifications for setting the ter are shown in table 3 below.
Table 1 below shows the u values required by building regulations for each component each decade during construction of a new dwelling.
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.
Whole building energy assessments are essential for understanding how the design of each construction element contributes to the performance of the building overall.
The complex way in which the different parts of a building specification interact also informs compliance with national building regulations.
These are expressed as a u value which needs to be achieved.
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.
Are u values important in the building regulations approved document part l.
The tables below show the suggested u values in england wales and scotland.
Unsure what level of thermal performance you require.
A landmark greek revival style apartment building benefits from the exceptional thermal performance of kingspan optim r floor insulation.
A lower u value indicates better insulation properties hence u value requirements usually specify a maximum value.
So the lower the u value the better.
U values sometimes referred to as heat transfer coefficients or thermal transmittances are used to measure how effective elements of a building s fabric are as insulators.
Windermere jetty museum of boats steam and stories this multi award winning museum has taken form with a copper clad envelope featuring high quality rainscreen insulation and pitched roof insulation.
That is how effective they are at preventing heat from transmitting between the inside and the outside of a building.
U value of a flat roof.
Wall 1 with u value of 0 3 w m2 k will lose heat at half the rate of wall 2 which has a u value of 0 6 w m2 k.
Check out our guide on what performance is required for the uk insulation building regulations.
