Required thermal ratings on
front doors to meet H1

Front Doors

MBIE will remove the schedule method from the H1 acceptable solutions in late 2025, with a 12-month transition period. Removing the schedule method will encourage designers to tailor and optimise insulation and window solutions for each building, helping to reduce upfront costs while still meeting H1 compliance.
Window manufacturers may see more project-specific window specifications as designers transition to the remaining calculation and modelling methods. Although these methods do not specify minimum R-value requirements for windows, designers of new homes must still demonstrate that their proposed building performs at least as well as a reference building fitted with R0.46 or R0.50 windows, depending on the climate zone.

Councils are starting to use this form to ensure materials comply.

Download Form How to Fill in the Statement of Thermal Performance

Learn about H1 Door Performance

Thermtek FL

Exceptional R-rated Aluminium Door

The Thermtek FL has been designed to grow and shrink with the elements, with very minimal bowing. Testing this year, on Parkwood’s own test rig, showed maximum bowing of only 2mm with a temperature differential of 50 degrees. Traditional thermally broken doors generally struck above 6 millimetres under the same conditions.

This design innovation combines aluminium with ‘pultrusion’ a new material in doors that’s structurally sound and is an excellent insulator.

The New Thermtek FL V2 door comes with an R-Value of 0.73 for a door 1980 x 860mm which will exceed the new building code requirements anywhere in New Zealand. This R-Value will improve as the door gets larger.

Excellent insulation

Watch the video to understand how the patented technology in the Thermtek FL door stops thermal bowing whilst providing excellent insulation in your front door.

Duramax, high R-value front door range

Making it easy to achieve H1 energy efficiency acceptable solution H1/AS1.

All Duramax doors have a R-value (m²·K/W) of at least 0.5 – some as high as 1.16!

Their excellent thermal efficiency will contribute positively to the windows and doors building element in all climate zones, New Zealand wide.

10 year warranty in any weather.
Smooth skin for painting any colour (Parkwood can pre-finish).
The Polyurethane core of Duramax doors provides a strong thermal rating, giving your home a warm, comfortable atmosphere in the winter and cool and crisp in the summer.
R value of at least 0.60 on unglazed doors (calculated as per ISO 10077-1 Third Edition 2017-6).
Solid resin edges – clean and tidy which can be trimmed or rebated.

Timber Doors

In addition to their design, timber doors can have a different R-Value depending on what type of wood they are and how it has been treated. R-Values of softwoods are higher than those of hardwoods.

Among the timber Parkwood stocks Emberwood has the highest R-Rating, followed by Cedar and Pine which have a very similar rating to each other.