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.


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.


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.


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.

Full house installation with flush sash windows

“We are very happy with the work carried our. Richard was brilliant and the doors and windows look great, would definitely recommend GHW.”

Mr & Mrs Crabtree - Rishton

July 14, 2022

“We wish to say a big thank you, the product, professionalism of the fitters and the flowers at the end was a lovely touch. From the initial consultation, you could tell the whole team was on point, very knowledgeable and at the top of their trade. We will certainly recommend you to anyone looking for windows etc.”

Mr Brierley - Whalley

July 11, 2022

“The fitters were good excellent and the whole process from order to fit has been very reassuring along with the quality of the workmanship.”

Mr Burrows - Clayton Le Moors

July 11, 2022

Very friendly, efficient, polite installers.

Mr Allen - Blackburn

March 15, 2022

Fitters arrived on time, were polite and extremely hard working. When they had completed the installation there was absolutely no evidence that they had worked in our property. The job was very neatly done and so far we are very pleased – thank you.

Mrs Myers - Blackburn

March 15, 2022

“Please may I take this opportunity to pass on my thanks to the whole team for such an excellent job. Every single person I’ve dealt with has been very friendly and professional especially the two fitters. Customer service was absolutely fantastic.”

Mrs Newman - Blackburn

March 9, 2022

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.