Pink Batts Ultra Used to Retrofit Skillion Roof

Although retrofitting skillion roofs is not as common as retrofitting pitch roofs, Skillion roofs can still be retrofitted under these scenarios:

From the outside, when the roof cladding is going to be changed or
From the inside if the rafters are exposed

Recently Pink Batts were involved on a retrofitting job with exposed rafters in a house built in 1990.

The customer was after the highest possible R-value that could be installed. They understood that 30% -35% of the heat loss goes through the roof in an uninsulated house and that it wouldn’t be practical/possible to try and come back and add a top-up later on.

The rafters’ depth was 170mm and because the insulation was going to be installed in between the GIB plasterboard (the old one and the new one), there was no need to leave an air gap.

What did we recommend?

Pink Batts Ultra R4.0 Wall – 140mm:

Due to its higher density, Pink Batts wall products can be used in either ceiling, wall or underfloor scenario.
Highest R-value suitable.

Other potential alternatives were:

Pink Batts Classic 2.6 - 140mm
Pink Batts Skillion Roof R3.2 – 115 max

Both alternatives would have done the work, but Pink Batts Ultra R4.0 Wall delivers the highest thermal performance in that scenario.

Pink Batts Skillion Roof Insulation

Comfortech Building Performance Solutions

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Pink Batts Skillion Roof insulation is light-weight, flexible glass wool insulation that thermally insulates modern ‘lean-to’ style ceilings and low profile roof designs with restricted roof cavities.

Pink Batts Skillion Roof Insulation has been appraised as a thermal insulation material for skillion roofs within the following scope:

domestic and commercial timber-framed skillion roofs where the insulation remains dry during its serviceable life; and,
as part of an insulation system to contribute to meeting the energy efficiency and other NZBC insulation requirements

In the opinion of BRANZ, Pink Batts Skillion Roof Insulation, if designed, used, installed and maintained in accordance with the statements and conditions of Appraisal No. 767 (2012), will meet or contribute to meeting the following provisions of the NZBC:

Clause B2 DURABILITY: Performance B2.3.1(a) not less than 50 years and B2.3.1(b) 15 years. Pink Batts Skillion Roof Insulation will meet this requirement.
Clause E3 INTERNAL MOISTURE: Performance E3.3.1. Pink Batts Skillion Roof Insulation will contribute to meeting this requirement.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Pink Batts Skillion Roof Insulation meets this requirement and will not present a health hazard to people.
Clause H1 ENERGY EFICIENCY: Performance H1.3.1(a) and H1.3.2 E. Pink Batts Skillion Roof Insulation will contribute to meeting these requirements.

Pink Batts Skillion Roof Insulation has been appraised as an Acceptable Solution in terms of New Zealand Building Code compliance. Pink Batts Skillion Roof Insulation thermal resistance (R-Value) has been determined by AS/NZS 4859.1 which is an acceptable method.

Durability

Internal Moisture

Hazardous Building Materials

Energy Efficiency

BRANZ Appraised

Pink Batts Ultra Wall Insulation - 140mm

Comfortech Building Performance Solutions

View Product

Pink Batts wall insulation is light-weight, flexible, glass wool insulation designed to thermally insulate timber framed walls.

Pink Batts insulation has been appraised as a thermal insulation material for walls, ceilings, and roofs of buildings within the following scope:

framed or part-framed domestic and commercial buildings where the insulation remains dry during its serviceable life

In the opinion of BRANZ, Pink Batts insulation, if designed, used, installed and maintained in accordance with the statements and conditions of Appraisal No. 238 (2012), will meet or contribute to meeting the following provisions of the NZBC:

Clause B2 DURABILITY: Performance B2.3.1(a) not less than 50 years and B2.3.1(b) 15 years. Pink Batts insulation insulation will meet this requirement.
Clause E3 INTERNAL MOISTURE: Performance E3.3.1. Pink Batts insulation insulation will contribute to meeting this requirement.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Pink Batts insulation insulation meets this requirement and will not present a health hazard to people.
Clause H1 ENERGY EFFICIENCY: Performance H1.3.1(a) and H1.3.2 E. Pink Batts insulation will contribute to meeting these requirements.

Pink Batts has been appraised as an Acceptable Solution in terms of New Zealand Building Code Compliance. Pink Batts insulation thermal resistance (R-Value) has been determined by AS/NZS 4859.1 which is an acceptable method.

Durability

Internal Moisture

Hazardous Building Materials

Energy Efficiency

BRANZ Appraised

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Insulation and Skillion Roofs

NZBC H1: Solid Masonry Wall Insulation

Simplifying Flat Roof Design: Cost Efficiency and Performance