Roof Insulation Regulations

If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs.

Roof insulation 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. Iecc 2015 requirements by climate zone 3. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

If you are replacing more than 25 of the roofing area then you will also need to replace the thermal insulation. How to insulate a roof. The higher the r value the better the thermal performance of the insulation. Browse product options or contact your local insulfoam rep to help you quickly pick the best products to simplify your building envelope needs and fit your project budget all with one supplier.

Insulation can be placed between the ceiling joists. You should fully consult the regulations and the approved document and if you are in any doubt seek advice before commencing work. The definition of a thermal element does not include windows doors roof windows or rooflights. If the new roof covering is going to be different than the old one and this will affect the roof in the event of a fire.

Summary of flat roof 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. Minimum insulation r value requirements non residential above roof deck.