New Roof Insulation Regulations

Movement could cause cracks to occur in the walls and possibly the eventual collapse of.

New roof insulation regulations.

R values are a measure of resistance to heat flow. These are expressed as a u value which needs to be achieved. Work to an existing roof. 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. New zealand standard nzs 4246. How to meet the current insulation regulations. Cold deck the thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification.

The minimum r value depends on which part of the country the property is in. The roof covering is then laid over the ply. Your roof type flat or pitched its structure depth of the rafters your willingness to invest. Building regulations standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects.

Insulating a roof is perhaps the easiest of all the energy saving home improvements. The removal or alteration to any roof elements could affect how the roof works and cause movement to occur. Chimney flues roofing etc. In most cases extra investment made in beating the building regulations on insulation is money well spent it gives a lot back in returns.