Roof Insulation Uk Regulations

Summary of flat roof building regulations.

Roof insulation uk regulations.

As a roof is defined as a thermal element the work to re cover a roof should also include for improving the thermal insulation properties of the roof. If you are installing loft insulation as part of a roof renovation project where more than 25 per cent of the roof is being renewed then the level of insulation should meet the standards required by building regulations approved documents. Depending on where you live in the uk snowfall must also sometimes be considered in determining the gradient of the fall. You are replacing repairing more than 25 per cent of the roof area in which case the roof thermal insulation would normally have to be improved.

In most cases extra investment made in beating the building regulations on insulation is money well spent it gives a lot back in returns. Your roof type flat or pitched its structure depth of the rafters your willingness to invest. If you are replacing more than 25 of the roofing area then you will also need to replace the thermal insulation. Insulating a roof is perhaps the easiest of all the energy saving home improvements.

It is possible to insulate a flat roof from underneath but this can lead to condensation problems if not completed correctly. You should fully consult the regulations and the approved document and if you are in any doubt seek advice before commencing work. Movement could cause cracks to. The definition of a thermal element does not include windows doors roof windows or rooflights.

Wales new dwellings. The removal or alteration to any roof elements could affect how the roof works and cause movement to occur. A u value of 0 55 w m k is used for cavity insulation and 0 30 w m k for internal or external wall insulation. Work to an existing roof.

Insulation can be placed between the ceiling joists. Care should be taken not to block any ventilation at the edges eaves.