Insulation of new flat roofs must satisfy part l of the building regulations.
Flat roof insulation thickness for building regulations.
Below that there are more detailed guides to the thermal insulation parts of building regulations standards.
All roofs should be insulated.
Since april 2006 this also applies to refurbishment of flat roofs.
Flat roofing insulation will have a huge impact on the energy efficiency of your property.
Insulation between flat roof joists 50mm air gap above decking surrey building control guidance note number 13.
Or else on the interior of the building just.
The type of insulation required will depend on the immediate environment in your area and specific building regulations.
This is placed over the roof joists and an board normally external ply is laid on top.
Insulation can also help to limit condensation and contribute to acoustic insulation depending on the type of insulation used.
Householder s guide to flat roofing.
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.
Take our online course on the building regulations and standards.
Bitumen membranes should be protected from the sun see surface protection section.
U value of a flat roof.
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.
Walls are defined by regulation 2 3 of the building regulations 2010 as being thermal elements.
Roof insulation thickness for building regulations will vary depending on the type of insulation used.
As you can see below there are separate regulations for england wales and scotland.
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.
Thermoplastic or elastomeric are the most effective and should extend up adjacent walls at least 150mm from the roof surface.
A lower u.
For further information contact the building regulations division.
The thickness of insulation will depend on the type of insulant.
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.
The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m.
Used within a bauder waterproofing system our products meet current uk building regulations part b for fire protection.
