New Zealand's #1 choice in insulated vinyl weatherboards

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R Value

Mitten Vinyl cladding can boost the energy efficiency of a home, and has environmental benefits in its use and manufacture

With a choice of 20mm or 30mm polystyrene foam-backing on each weatherboard, the home benefits from increased insulation and the range of temperature variation inside the building is greatly reduced, making it cooler in summer and warmer in winter. This will lead to significant energy cost savings and environmental benefits, including a reduction in carbon footprint and lower power consumption to control temperature inside the home.

The result is a more comfortable home to live in, and lower energy bills.

When installed in accordance with the New Zealand Building Code, Mitten Vinyl cladding will add significantly to the insulation of a home.

Trapped air is an excellent insulator, as long as the air is not moving. This principal of insulation is used in double glazed windows and the Thermos® flask – two good examples of how trapped air works as an insulator to keep what’s inside warm or cold.

The correct installation of insulated vinyl cladding over existing timber or fibre cement walls, or onto new framework with correct underlay, will create an air gap inside the wall which will act as an excellent insulator.

Polystyrene foam is a lightweight and cost-effective form of insulation, providing significant savings in energy costs. The recommended installation of foam backed vinyl cladding over framework with an underlay of plywood or fibre cement sheeting achieves an R value of approximately R1.5 with the air gap created by 90mm framework.

R value can be further increased by the use of in-wall insulation such as fibreglass batts, and a compliant wall wrap underlay. An R value of 3 should easily be achieved if these principles are adhered to.


Standard uninsulated weatherboards allow the warmth from your home to escape

Our insulated weatherboards repel cold and retain the heat in your home, where it belongs

The great advantage of our foam-backed insulated vinyl cladding is being able to add a layer of insulation to the entire home without any demolition or reconstruction, resulting in higher insulation levels and energy savings year after year. This is good news for the homeowner, and for the planet.