Flat Roof Insulation Thickness For Building Regulations

Thermoplastic or elastomeric are the most effective and should extend up adjacent walls at least 150mm from the roof surface.

Flat roof insulation thickness for building 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. Since april 2006 this also applies to refurbishment of flat roofs. Different insulants have different efficiencies and performance levels which affects the thickness required to meet building regulations. The extent to which the work on the element is controlled and the amount of upgrading needed depends on the particular circumstances of the thermal element.

Used within a bauder waterproofing system our products meet current uk building regulations part b for fire protection. Or else on the interior of the building just. Flat roofing insulation will have a huge impact on the energy efficiency of your property. Insulation of new flat roofs must satisfy part l of the building regulations.

Roof insulation thickness for building regulations will vary depending on the type of insulation used. To comply with part l of the building regulations 2010 all roofs to rooms except those in unheated buildings should be thermally insulated to a maximum u value of of 0 18 w m k. Warm deck the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. Householder s guide to flat roofing.

Bitumen membranes should be protected from the sun see surface protection section. For further information contact the building regulations division. The type of insulation required will depend on the immediate environment in your area and specific building regulations. 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.

Take our online course on the building regulations and standards. Insulation can also help to limit condensation and contribute to acoustic insulation depending on the type of insulation used. Ventilation is required for these roofs. Below that there are more detailed guides to the thermal insulation parts of building regulations standards.

As you can see below there are separate regulations for england wales and scotland. All roofs should be insulated. The thickness of insulation will depend on the type of insulant. U value of a flat roof.

A lower u. A thermal layer of fibreglass polystyrene or other insulating material should be inserted either above the roof decking the warm roof model which is suitable for homes or permanent residences.