Flat Roof U Value Building Regs

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.

Flat roof u value building regs.

Check out our guide on what performance is required for the uk insulation building regulations. A lower u value indicates better insulation properties hence u value requirements usually specify a maximum value. This is placed over the roof joists and an board normally external ply is laid on top. The target u value for flat roofs on existing buildings other than dwellings are shown in table 4 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. Element new build extension renovation. Get a u value calculation. Ventilation is required for these roofs.

For more information see our articles and how to videos below. For example scotland buildings will need a lower u value due to the colder weather than england. Scotland current building regs 2018. Get a sample pack.

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. We provide u value calculations to show compliance with current building regulations standards and best practice. These things will affect the timing cost and overall running of your project. The tables below show the suggested u values in england wales and scotland.

Make sure your comply with flat roof building regulations. The complex way in which the different parts of a building specification interact also informs compliance with national building regulations. The easiest way of getting a u value calculation is by using our free online u value calculator. These are expressed as a u value which needs to be achieved.

These can be supported with a detailed report. U value of a flat roof. 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.

The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. 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. New roofs thermal.