Insulation Calculator NZ
We'll adjust units, stud spacings, and insulation ratings based on your region.
Select the part of the building you want to insulate.
Enter the total area directly, or calculate it from room dimensions.
Choose the spacing between your wall studs, ceiling joists, or floor joists.
Choose the thermal resistance level for your insulation. Higher values mean better performance.
Our free NZ insulation calculator helps New Zealand homeowners and landlords calculate insulation requirements that comply with NZ Building Code H1 and the Healthy Homes Standards.
Getting your insulation quantities right the first time saves money and multiple trips to the store. Our calculator takes the guesswork out of insulation planning by providing accurate estimates based on your specific project dimensions, stud spacing, and target R-value. Whether you are a DIY homeowner or a professional contractor, this tool streamlines the estimation process.
NZ Building Code H1 requires minimum R-values of R-2.9 to R-3.3 for roofs, R-1.9 to R-2.0 for walls, and R-1.3 for floors, depending on your climate zone (1-3).
Yes, since 2008 all rental properties must have ceiling and underfloor insulation that meets minimum standards. The Healthy Homes Standards require insulation to be installed within 90 days of a new tenancy.
Polyester and fiberglass batts are the most common insulation types in New Zealand. Pink Batts (by Fletcher Insulation) is a well-known brand, along with Knauf Earthwool and Expol underfloor solutions.
Stay informed with expert tips on insulation, energy efficiency, and home improvement.
Proper home insulation is one of the most impactful upgrades you can make for energy efficiency. In this comprehensive guide, we cover everything from choosing the right insulation type—fiberglass batts, blown-in cellulose, spray foam—to understanding R-values and local building codes.
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R-value measures how well insulation resists heat flow. A higher R-value means better thermal performance and greater energy savings. But what R-value do you actually need? The answer depends on your climate zone and local building requirements.
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Your attic is the single biggest source of heat loss in most homes. Properly insulating it can reduce heating costs by up to 30%. From sealing air leaks around recessed lights to choosing between blown-in and batt insulation, these expert tips will help you.
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