Ceiling Insulation R Value Nz

R value measures how well certain building insulation materials can resist heat.

Ceiling insulation r value nz.

Minimum r values for zones 1 and 2. The higher the r value the greater the insulation performance. Know exactly how much you need with our project calculators. This means for example that pink batts ultra r4 0 insulation is more effective than pink batts classic r1 8.

Pitched timber framed roof r 3 3. Tiny air particles trapped in insulation resist the transfer of heat and cold. For heated walls or ceilings higher r values are required walls r 2 6 ceilings r 3 5. Why is a higher r value better.

The new zealand building code specifies minimum r values for ceiling insulation in different regions reflecting the climate. Higher r value better insulation. You need to install an insulation product with an r value between 2 2 and 2 8. The branz house insulation guide provides construction r values for common construction types.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Insulation requirements www tenancy govt nz 0800 tenancy 0800 836 262. Building code requirements for house insulation previous r values for common construction types next. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3.

The higher the r value the better the insulation is at reducing heat flow. Insulation that doesn t meet the regulations must be topped up or replaced. You can find some of the examples here. When determining how much insulation you need don t guesstimate calculate.

Minimum r values for zone 3. Availability is through regional projects. The r value of carpets or floor coverings must not be included in calculation of floor r value for heated floors. In an uninsulated house more heat is lost through the ceiling and roof than any other part of the house making the roof the top priority for insulation.

The r value is a measure of the insulation s effectiveness the higher the r value the better the insulation will perform. The building code outlines minimum r values which depend on what part. If there s more than one layer of insulation their product r values may be combined. Healthy homes projects provide free ceiling and underfloor insulation for low income households occupied by people with health needs related to cold damp housing.

All insulation must be in reasonable condition.