Roof Insulation Requirements Nz

By october 2008 all new homes and major extensions across new zealand were required to meet the new insulation requirements.

Roof insulation requirements nz.

The standard explains the correct way to install insulation in an effective and safe way. It must comply with the regulations and be safely installed. Insulation must be installed in accordance with new zealand standard 4246 2016 external link. Insulation is now compulsory in all rental homes.

Iecc 2015 requirements by climate zone 3. Pink batts ultra insulationhas higher r values thanpink batts classic insulation. Our first choice for ceiling insulation is mammoth polyester insulation we favour it because it is nz made non irritant safe easy to use and the polyester fibres have a permanent heat bond that is long lasting. This means there should be no mould dampness damage or gaps.

We only use proven ceiling insulation products that we are confident will last and are backed by significant manufacturer warranties. Where the landlord intends to demolish or substantially rebuild all or part of the property within 12 months of the start of a tenancy. All existing insulation must still be in reasonable condition to meet the requirements. The insulation s thickness has not degraded by more than 30 compared to when it was installed.

Insulation must keep a distance of at least 25mm from the roof underlay in all parts of the ceiling roof area. Ceiling or roof framing is commonly 90 mm deep so insulation should be within 20 mm of the top of the ceiling or roof framing if not above it. Minimum insulation r value requirements non residential above roof deck. Homes in new zealand must have adequate insulation so you need to make sure they have the right level of thermal resistance r value for their location.

If part of a roof is too low to install insulation that meets the requirements then a less thick insulation product may be used in those low clearance areas. The healthy homes standards include new requirements for insulation which will take effect from 1 july 2021 for some rental properties with all rental properties to comply by 1 july 2024. Other exceptions to current insulation requirements there are other situations in which rental properties may not need to meet the current insulation requirements. Insulation requirements are expressed as r value and the higher the r value the better the insulation provided.

You can find information on zone specific r values as well as the calculation and modelling method for showing compliance with the building code clause h1. It includes guidance on what safety clearances are required from downlights chimney flues roofing etc.