High R-Value insulation in a Skillion roof – with Pink® Batts®

High R-Value insulation in a Skillion roof – with Pink® Batts®
May 17, 2017

What is a Skillion roof?

A Skillion roof is a pitch roof where the ceiling lining is parallel to the roof cladding.  The space between the ceiling and the roof cladding is limited by the depth of the rafter. Insulation is placed between the rafters.

Skillion roof constructions are becoming more common in New Zealand and if not designed properly there is a risk of moisture related issues – they are vulnerable to condensation and complicated to ventilate.

An important requirement when designing a Skillion roof is maintaining an air gap of at least 25mm between the roof underlay and the top of the insulation.  Specifiers have to consider the recovery of insulation products otherwise the air gap can be compromised. Because the space between ceiling and roof cladding is limited, the standard celling range where insulation thickness might expand above its nominal thickness may not be the best choice.

How can you achieve high R values (better thermal performance) and be sure that the air gap clearance is going to be maintained?

Available in both R3.2 and R3.6 with a guarantee of maximum thickness, so you are assured that it won’t expand beyond the specified thickness, and clearances can be designed accordingly:

Pink® Batts® R 3.2 will reach a max of 115 mm – Designed to be used with 140mm rafters

Pink® Batts® R 3.6 will reach a max of 165 mm – Designed to be used with 190mm rafters

Both products are BRANZ Appraised and have a Lifetime Warranty


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