Sloping Roof Insulation Regulations

Dual purpose structural deck and insulating planks.

Sloping roof insulation regulations. Lightweight insulating concrete lwic. Pitched roofs overview. The tables below show the suggested u values in england wales and. 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.

Be able to support loads weights provide resistance to heat loss insulation be ventilated to protect from condensation in most cases have adequate drainage. Ventilated roofs require a 50 mm air gap above the insulation timber stop battens can be nailed into the side of the rafters to give the correct air gap when installing the insulation. For an extension will be required to. No ventilation is required for these types of roofs.

The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. In addition roofs must provide good thermal insulation and prevent the spread of fire from adjacent or adjoining properties. According to the uk building regulations pitched roofs should achieve the u value of 0 18 w m2 depending on. The insulation used in low slope roof assemblies typically falls into one of the four categories.

Building regulations and standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects. The function of a roof is to protect the building below from the weather. A qualified roofing contractor will be able to advise on this but here are some of the main guidelines. In order to satisfactorily fulfil this function over a period of years it must be strong stable and durable.

Resist the spread of fire from one property to another. Scotland or wales type of building domestic or non domestic and the application floor wall or roof. New roofs weight loading advertisement. Final thing you should pay attention to when adding pitched roof insulation is the quality of the chosen insulation material through bba certificates and its ability to conform to the values prescribed by applicable building codes.

How to insulate a roof. 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. The insulation may consist of 2 or 3 layers depending upon the type of insulated plasterboard. The insulated plasterboard should then be placed with the long edges running across the rafters.

Sheet insulation fitted between the rafters the thicker the better but the size of rafter may limit the thickness possible once an allowance has been made for the required 50mm 2 inch air gap. Building regulations for insulating a roof heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls.