CERTASS

GHW Windows are members of CERTASS, CERTASS is a Competent Person Scheme gives installers the chance to self-certify their work and ensure it complies with all the local Building Regulations. This means they can work on your home without the need for an inspection from local authorities, saving both time and money.

These schemes help tradespeople prove their ability to do work, and consequently drive up the standards of the building industry as a whole.

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GGF

As a member of the Glass and Glazing Federation (GGF), as a business we have been recognised for our commitment to providing high quality installations within the glass and glazing sector.

GGF are the major authority, promoting best practice and sets the highest technical and health and safety standards across the industry. The GGF is a government recognised authority and is influential in the new standards and regulations such as the  Building Regulations 2022. This ensures homeowners across the UK are protected and up to date with the latest home renovation techniques.

TGAS

The Glazing Arbitration Scheme (TGAS) is an independent ADR (alternative dispute resolution) scheme and the primary ADR for the Glass & glazing industry. As a member of TGAS in the unlikely event that you the consumer are unsatisfied with the service provided, TGAS will step in as a fair and impartial arbitrator to evaluate the case without the need for lawyers or face to face meetings. This allows for a cost and time effective solution for all parties involved.

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QANW

Great Harwood Windows is a business with a Quality Assured National Warranties (QANW) backing. A fully regulated insurance provider, ensuring that insurance products are delivered every time to provide homeowners across the UK with peace of mind when considering their home renovation projects including, double glazing, conservatories, windows, doors and roofline products.

Trustmark registered

Being registered members of Trustmark, we have demonstrated our continuous commitment to delivering the highest standards of customer service, trading practise and technical ability.
Being the only Government Endorsed Quality Scheme in the UK, you can rest assured you’re in competent hands with a Trustmark registered business. Any business given Trustmark approval has been thoroughly vetted and monitored to ensure they maintain the necessary standards in technical competence, trading practise and customer service so that homeowners can make informed decisions without bias.

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external view of a house with a garage and black composite front door

Find out more about our fully accredited glazing products

Accreditations help to give homeowners peace of mind that they are working with a professional and reputable company. Click on the links below to find out more about our range of fully accredited glazing products.

Composite door vs aluminium doors

Spitfire aluminium doors

Conservatory roof replacements

Full house installation with flush sash windows

“The front of our home looks totally different now, following installation of our new Endurance Composite door. Our home is also less drafty.
Communication by Great Harwood Windows was excellent, door was fitted on the scheduled date and time at the agreed price. Our home was left clean and tidy, old door was taken away. Excellent service, highly recommended.”

Mrs Pentony - Blackburn

March 28, 2025

“New conservatory roof. Very professional and efficient team of fitters. No complaints whatsoever
Thank you Great Harwood Windows job well done. On time and on budget!”

Mr Hutchings - Blackburn

March 28, 2025

“All went really well from start to finish, communication was great and the fitters where excellent. Very friendly and have done a great job. Would happily use again.”

Mrs McAuley - Darwen

March 28, 2025

“Really happy with the service from GHW, excellent survey and sales visit, friendly and low pressure. The order was fulfilled to perfection, and was double checked before parts were made and once again before installation. Installers were friendly, professional and left our property clean and tidy. Queries were dealt with swiftly and to our satisfaction. Will definitely recommend and use again.”

Mr Barrow - Great Harwood

February 27, 2025

“I can’t tell you how pleased I am. They look stunning. The service I have received from start to finish has been fantastic which is rare these days. I’d be happy to recommend you to anyone who needs new windows.”

Mrs Smith - Pendle

February 7, 2025

“We would just like to pass on our thanks and gratitude for an excellent standard of service and  professional workmanship received from you when replacing our conservatory roof this January . They all work incredible hard and completed the task ahead of schedule . Your workforce from planning, installment etc. are a credit to your company and we also prefer to support local businesses.”

Mrs Towne - Blackburn

January 31, 2025

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Get in Touch

Based in the heart of Lancashire

Situated in the very heart of Blackburn, we are readily capable of providing the people of East Lancashire and surrounding areas with a range of UPVC, composite and aluminium products. Whether for personal or trade purposes, realising your aspirations are only one step away with Great Harwood Windows team.