The higher the r value the greater the insulation performance.
Ceiling insulation r value nz.
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.
You need to install an insulation product with an r value between 2 2 and 2 8.
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.
For heated walls or ceilings higher r values are required walls r 2 6 ceilings r 3 5.
Insulation requirements www tenancy govt nz 0800 tenancy 0800 836 262.
This means for example that pink batts ultra r4 0 insulation is more effective than pink batts classic r1 8.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
Higher r value better insulation.
When determining how much insulation you need don t guesstimate calculate.
The thermal effectiveness of insulation is measured by its thermal resistance or r value.
Know exactly how much you need with our project calculators.
Insulation that doesn t meet the regulations must be topped up or replaced.
Building code requirements for house insulation previous r values for common construction types next.
The r value of carpets or floor coverings must not be included in calculation of floor r value for heated floors.
The branz house insulation guide provides construction r values for common construction types.
The building code outlines minimum r values which depend on what part.
R value measures how well certain building insulation materials can resist heat.
Pitched timber framed roof r 3 3.
The higher the r value the better the insulation is at reducing heat flow.
You can find some of the examples here.
The r value is a measure of the insulation s effectiveness the higher the r value the better the insulation will perform.
Tiny air particles trapped in insulation resist the transfer of heat and cold.
Warm up new zealand.
All insulation must be in reasonable condition.
If there s more than one layer of insulation their product r values may be combined.
Rest of the north island.
Healthy homes projects provide free ceiling and underfloor insulation for low income households occupied by people with health needs related to cold damp housing.
Minimum r values for zone 3.
