Roof Insulation Requirements Nz

Iecc 2015 requirements by climate zone 3.

Roof insulation requirements nz. 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. This means there should be no mould dampness damage or gaps. Pink batts ultra insulationhas higher r values thanpink batts classic insulation. Insulation must be installed in accordance with new zealand standard nzs 4246 2016.

Since 1 july 2019 ceiling and underfloor insulation is compulsory in all rental homes where it is reasonably practicable to install. Insulation is now compulsory in all rental homes. 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. Browse product options or contact your local insulfoam rep to help you quickly pick the best products to simplify your building envelope needs and fit your project budget all with one supplier.

The standard explains the correct way to install insulation in an effective and safe way. Minimum insulation r value requirements non residential above roof deck. 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 requirements are expressed as r value and the higher the r value the better the insulation provided. Insulation must keep a distance of at least 25mm from the roof underlay in all parts of the ceiling roof area. 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. 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.

We only use proven ceiling insulation products that we are confident will last and are backed by significant manufacturer warranties. By october 2008 all new homes and major extensions across new zealand were required to meet the new insulation requirements. Other exceptions to current insulation requirements there are other situations in which rental properties may not need to meet the current insulation requirements. Where the landlord intends to demolish or substantially rebuild all or part of the property within 12 months of the start of a tenancy.

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. 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.