Roof Insulation Uk Regulations

Warm deck this is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation.

Roof insulation uk regulations.

Walls are defined by regulation 2 3 of the building regulations 2010 as being thermal elements. 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. Nhbc regulation 2011 insulation and control of condensation. No ventilation is required for these types of roofs.

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. 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. Heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls. A qualified roofing contractor will be able to advise on this but here are some of the main guidelines.

The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. The actual regulations require that loft insulation should be at least 270 mm thick and must have good thermal properties. Insulation and thermal elements. Care should be taken not to block any ventilation at the edges eaves.

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. These are expressed as a u value which needs to be achieved. Currently uk building regulations stipulate that a minimum depth of 270mm is required to adequately protect your home and keep it properly insulated.

Building regulations for insulating a roof. 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.