New Roof Insulation Regulations

Insulation is measured by r value.

New roof insulation regulations.

Work to an existing roof. Cold deck the thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification. Chimney flues roofing etc. 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.

In most cases extra investment made in beating the building regulations on insulation is money well spent it gives a lot back in returns. Insulating a roof is perhaps the easiest of all the energy saving home improvements. Your roof type flat or pitched its structure depth of the rafters your willingness to invest. The minimum r value depends on which part of the country the property is in.

R values are a measure of resistance to heat flow. Movement could cause cracks to occur in the walls and possibly the eventual collapse of. How to meet the current insulation regulations. 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.

These are expressed as a u value which needs to be achieved. The removal or alteration to any roof elements could affect how the roof works and cause movement to occur. 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.