Flat Roof U Value Building Regs

Make sure your comply with flat roof building regulations.

Flat roof u value building regs.

U values are important because there are certain standards according to the building regulations and standards depending on location. Existing buildings do not require a target co2 emissions rate however they do require a target u value to meet for building elements walls floors and roofs. This is placed over the roof joists and an board normally external ply is laid on top. For more information see our articles and how to videos below.

Warm deck the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. For example scotland buildings will need a lower u value due to the colder weather than england. We provide u value calculations to show compliance with current building regulations standards and best practice. U value of a flat roof.

Wales can get away with having a higher u value than england and scotland because it is typically less cold. These things will affect the timing cost and overall running of your project. 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. The tables below show the suggested u values in england wales and scotland.

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. Element new build extension renovation. The target u value for flat roofs on existing buildings other than dwellings are shown in table 4 below. The complex way in which the different parts of a building specification interact also informs compliance with national building regulations.

Sometimes the excitement of starting a new construction project or building venture can lead you to forget about the finer details such as planning permission and local building regulations. These can be supported with a detailed report. Building regulations for insulating a roof heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls. Scotland current building regs 2018.

The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. Get a u value calculation. Get a sample pack. Ventilation is required for these roofs.

Check out our guide on what performance is required for the uk insulation building regulations. These are expressed as a u value which needs to be achieved. New roofs thermal.