Roof Insulation Uk Regulations

Depending on where you live in the uk snowfall must also sometimes be considered in determining the gradient of the fall.

Roof insulation uk regulations.

Your roof type flat or pitched its structure depth of the rafters your willingness to invest. 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. 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.

The definition of a thermal element does not include windows doors roof windows or rooflights. Wales new dwellings. 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. 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.

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. Summary of flat roof building regulations. In most cases extra investment made in beating the building regulations on insulation is money well spent it gives a lot back in returns.

Insulation can be placed between the ceiling joists. If your flat roof needs to be replaced anyway you must now insulate it to comply with building regulations. If you are replacing more than 25 of the roofing area then you will also need to replace the thermal insulation. Care should be taken not to block any ventilation at the edges eaves.

Our guides to building regulations in wales adl1a 2014 building regulations. The removal or alteration to any roof elements could affect how the roof works and cause movement to occur.