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Our Accreditations


Malbern Windows meet the requirements of the Trustmark scheme in relations to, complaints handling, issuing of consumer contracts, liability insurance requirements, guarantee issue and workmanship.

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Thermal Rating Register

The Thermal Rating Register confirms Malbern Windows has submitted calculated data for the thermal performance of its window and door products. The Thermal Rating Register has checked all provided calculations and confirms Malbern meet the minimum requirements of Part L of the Building Regulations 2010.

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Certass Competetent Person Registration Certificate

Certass Limited certify that Malbern Windows meets the requirements of the Department of Communities and Local Government license terms to self-certify installations under regulation 4 and 7 of the Building Regulations effective in England and Wales and is registered with the Certass certification scheme.

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Independent Warranty Association

The Independent Warranty Association (IWA) are a market leader for deposit and guarantee insurance, providing protection and guarantee insurance. Malbern Windows are a member of the IWA meaning our customers investments and insurance polcies are as safe as our windows and doors!