H1 insulation requirements
The H1 insulation requirements for roof, wall and underfloor insulation in housing and small buildings, and what they mean for your build.
We review your current plans and find the most affordable way to insulate your property. For a small fee you could save hundreds or even thousands that can go into other parts of your home.
The key H1 insulation requirements
The changes announced by the Ministry of Business, Innovation and Employment in November 2021 are significant steps toward warmer, more energy efficient buildings in New Zealand.
More climate zones
Climate zones expanded from three to six, so insulation requirements are better matched to each region.
Higher insulation requirements
Increased requirements for roofs, walls, floors, windows, doors and skylights, reducing heat loss in winter and heat gain in summer.
New pathway for HVAC systems
A new compliance pathway for heating, ventilating and air conditioning in commercial buildings, encouraging energy efficient systems.
Better windows and doors
Higher performance standards for windows and doors in housing, phased in with a transition period.
Carbon savings
The goal is to reduce the energy required to heat homes by around 40 percent, generating significant carbon savings.
Small buildings under 300m2
New and more stringent roof, wall and underfloor requirements in the current H1/AS1 and H1/VM1.
Six zones, matched to the region
The H1 changes split New Zealand into six climate zones. Rodney, Auckland and Northland sit in climate zone 1, the warmest, but ceiling requirements are now R6.6 in every zone.
Your building consent will state which zone the site is in and the R values the build must meet. Send us your plans and we will price to them.
Energy efficiency for housing and small buildings
There are new and more stringent requirements for roof, wall and underfloor insulation in the current H1/AS1 and H1/VM1 for buildings under 300m2. Ceiling construction R values have increased from R2.9 or R3.2 to R6.6 across all six climate zones.
The minimum thermal resistance values determine how effectively insulation resists heat flow, which keeps indoor temperatures comfortable and reduces the need for heating. Builders, contractors and property owners need to know them when planning a build or a renovation.
Rodney Insulation can supply and install the right solution to meet your H1 requirements. Call 0800 857 232.
