New Roof Insulation Regulations

Chimney flues roofing etc.

New roof insulation regulations.

These are expressed as a u value which needs to be achieved. Movement could cause cracks to occur in the walls and possibly the eventual collapse of. How to meet the current insulation regulations. New insulation in rental properties needs to meet minimum r values.

R values are a measure of resistance to heat flow. The roof covering is then laid over the ply. Building regulations standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects. Insulation is measured by r value.

Insulating a roof is perhaps the easiest of all the energy saving home improvements. Work to an existing roof. The minimum r value depends on which part of the country the property is in. Cold deck the thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification.

New zealand standard nzs 4246. As a roof is defined as a thermal element the work to re cover a roof should also include for improving the thermal insulation properties of the roof. A ventilation gap usually 50mm should be provided between the top of the insulation and underside of the roof covering to allow the air to flow across. In most cases extra investment made in beating the building regulations on insulation is money well spent it gives a lot back in returns.