The r value is a measure of the insulation s effectiveness the higher the r value the better the insulation will perform.
Ceiling insulation r value nz.
All insulation must be in reasonable condition.
Know exactly how much you need with our project calculators.
Minimum r values for zone 3.
You need to install an insulation product with an r value between 2 2 and 2 8.
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.
Building code requirements for house insulation previous r values for common construction types next.
Insulation that doesn t meet the regulations must be topped up or replaced.
This means for example that pink batts ultra r4 0 insulation is more effective than pink batts classic r1 8.
Availability is through regional projects.
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.
Minimum r values for zones 1 and 2.
The branz house insulation guide provides construction r values for common construction types.
You can find some of the examples here.
The higher the r value the better the insulation is at reducing heat flow.
The thermal effectiveness of insulation is measured by its thermal resistance or r value.
For heated walls or ceilings higher r values are required walls r 2 6 ceilings r 3 5.
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 greater the insulation performance.
Tiny air particles trapped in insulation resist the transfer of heat and cold.
When determining how much insulation you need don t guesstimate calculate.
Higher r value better insulation.
Pitched timber framed roof r 3 3.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
Why is a higher r value better.
R value measures how well certain building insulation materials can resist heat.
Warm up new zealand.
Insulation requirements www tenancy govt nz 0800 tenancy 0800 836 262.
The building code outlines minimum r values which depend on what part.
