Roof Insulation Uk Regulations

Currently uk building regulations stipulate that a minimum depth of 270mm is required to adequately protect your home and keep it properly insulated.

Roof insulation uk regulations.

The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. Heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls. Insulation and thermal elements. Building regulations does not determine which material must be used but it stipulates what qualities it must posses.

This is just under a third of a metre which may seem like quite a lot to you. There must be a slope of 1 80 part h of the building regulations regarding drainage state that water should drain to one or two edges waterproofing should extend up the adjacent walls at least. Walls are defined by regulation 2 3 of the building regulations 2010 as being thermal elements. Nhbc regulation 2011 insulation and control of condensation.

No ventilation is required for these types of roofs. Building regulations standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects. A qualified roofing contractor will be able to advise on this but here are some of the main guidelines. The actual regulations require that loft insulation should be at least 270 mm thick and must have good thermal properties.

Making significant changes to thermal elements walls roofs or floors would normally require building regulations approval and require the thermal insulation of the element to be upgraded to a reasonable standard. 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. 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. Care should be taken not to block any ventilation at the edges eaves.

Building regulations for insulating a roof. Cold deck this is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof.