New Roof Insulation Regulations

Your roof type flat or pitched its structure depth of the rafters your willingness to invest.

New roof insulation regulations.

Insulation is measured by r value. How to meet the current insulation regulations. 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. The minimum r value depends on which part of the country the property is in.

In most cases extra investment made in beating the building regulations on insulation is money well spent it gives a lot back in returns. Movement could cause cracks to occur in the walls and possibly the eventual collapse of. Chimney flues roofing etc. The roof covering is then laid over the ply.

Cold deck the thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification. Building regulations standards set the levels of thermal insulation required when carrying out building work either for new build or refurbishment projects. 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.

New zealand standard nzs 4246. These are expressed as a u value which needs to be achieved. R values are a measure of resistance to heat flow. The removal or alteration to any roof elements could affect how the roof works and cause movement to occur.