New Roof Insulation Regulations

No ventilation is required for these types of roofs.

New roof insulation regulations.

These are expressed as a u value which needs to be achieved. These requirements apply to all rental properties covered by the residential tenancies act. Current insulation regulations since 1 july 2019 ceiling and underfloor insulation is compulsory in all rental homes where it is reasonably practicable to install. The removal or alteration to any roof elements could affect how the roof works and cause movement to occur.

Building regulations simplified building regulations standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects. How to insulate a roof. Some repairs to flats roofs will not require an application for approval under the building regulations. When ventilating a roof the air should be able to enter at one end and travel through to the other end where it can exit.

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. 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. You are replacing repairing more than 25 per cent of the roof area in which case the roof thermal insulation would normally have to be improved. 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.

Ventilation is not required to a warm roof system which is where the insulation is placed above the joists or rafters.