New Roof Insulation Regulations

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

New roof insulation regulations.

The roof covering is then laid over the ply. R values are a measure of resistance to heat flow. These are expressed as a u value which needs to be achieved. In most cases extra investment made in beating the building regulations on insulation is money well spent it gives a lot back in returns.

Insulation is measured by r value. New insulation in rental properties needs to meet minimum r values. Chimney flues roofing etc. The removal or alteration to any roof elements could affect how the roof works and cause movement to occur.

How to meet the current insulation regulations. The minimum r value depends on which part of the country the property is in. Work to an existing roof. New zealand standard nzs 4246.

Cold deck the thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification. 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. Insulating a roof is perhaps the easiest of all the energy saving home improvements. 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.