Flat Roof U Value Building Regs

U value of a flat roof.

Flat roof u value building regs.

Get a sample pack. The tables below show the suggested u values in england wales and scotland. Wales can get away with having a higher u value than england and scotland because it is typically less cold. The complex way in which the different parts of a building specification interact also informs compliance with national building regulations.

These things will affect the timing cost and overall running of your project. Make sure your comply with flat roof building regulations. The easiest way of getting a u value calculation is by using our free online u value calculator. 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. Scotland current building regs 2018. 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. Whole building energy assessments are essential for understanding how the design of each construction element contributes to the performance of the building overall.

These can be supported with a detailed report. 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. Ventilation is required for these roofs. 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.

These are expressed as a u value which needs to be achieved. Get a u value calculation. U values are important because there are certain standards according to the building regulations and standards depending on location. New roofs thermal.

A lower u value indicates better insulation properties hence u value requirements usually specify a maximum value. The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. For example scotland buildings will need a lower u value due to the colder weather than england. 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.

This is placed over the roof joists and an board normally external ply is laid on top. We provide u value calculations to show compliance with current building regulations standards and best practice. The target u value for flat roofs on existing buildings other than dwellings are shown in table 4 below.