Critical Documents to request from Window Supplier

7 November 2025

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Windows and doors must comply with several Australian Standards, and your window supplier must prove that they do. There is a real risk to architects and builders by falsified or non-existing test reports or the quoting of a different Standard.

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Australian Standards:

AS 1288 Glass in Buildings - selection & Installation
AS 2047 Windows and external glazed doors in buildings
AS 4055 Wind loads for housing
AS 3959 Construction of buildings in bushfire-prone areas
NCC – National Construction Code - 2019 Commercial
NCC – National Construction Code - 2022 Residential

Performance Tests:

Under AS 2047, windows made from timber, aluminium, uPVC or other materials undergo the following performance tests to verify product performance claims:

• Deflection Test - positive and negative wind pressures are applied to the face of the window to test the maximum deflection under wind load.

• Operating Force Test - verifies that an opening sash can open and close without undue effort.

• Air Infiltration Test - air leakage of a window is tested to ensure energy and acoustic efficiency.

• Water Penetration Resistance Test - ensures no water leaks through the window into the building.

• Ultimate Strength Test - negative and positive wind pressures of at least 1.5 times the specified wind pressure are applied to the window to ensure it does not fail in unusual wind conditions.

Paarhammer had its products tested by third-party NATA-accredited testing facilities

Samples of Tests:

Clients can and should ask for test reports on their preferred window choice before purchase to ensure these products meet or exceed the required Australian Standards.

WERS – Window Energy Rating Scheme

WERS is accredited by the Australian Fenestration Rating Council (AFRC) and adheres to AFRC protocols and procedures for rating windows and glazed doors. Energy ratings provided by WERS are third-party certified to AFRC requirements, compliant with the NCC, and able to be used to meet regulatory requirements.

Window Compliance Certificate

Window suppliers also have to supply you with a Window Compliance Certificate, usually at the completion of supply and once all payment is received. The Paarhammer Compliance Certificate is based on the Australian Glass and Windows Association Accredited Member template:

QLD also requires different additional forms.

Passivhaus Certification

For Passivhaus (Passive House), all different building components need to be tested and approved by the International Passive House Association in Darmstadt, Germany, and you can check if the windows you wish to use are listed on the international component database. See here for what Paarhammer's Passive House Range includes.

Paarhammer Certificate:

All windows and doors must meet minimum requirements under Australian building regulations to withstand Australian conditions. Don’t get caught out with products that do not comply; ensure you receive all the correct documentation.

Download pdf: Enhancing Building Safety and Sustainability through Window Compliance: Insights and Pathways