Roof Insulation Uk Regulations

Care should be taken not to block any ventilation at the edges eaves.

Roof insulation uk regulations.

Building regulations standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects. These are expressed as a u value which needs to be achieved. 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. No ventilation is required for these types of roofs.

Insulation and thermal elements. 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. 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. Building regulations does not determine which material must be used but it stipulates what qualities it must posses.

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. Walls are defined by regulation 2 3 of the building regulations 2010 as being thermal elements. Heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls.

7 2 d11 a ventilation of main roof spaces pitched roofs with insulation at ceiling level should always be ventilated to the outside air to minimise the risk of ventilation. 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. The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m.

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. This is just under a third of a metre which may seem like quite a lot to you.