Fenestration Industry

Expert Witness to the Fenestration Industry

We have many years’ experience of providing expert witness services to the fenestration industry. Our typical clients are individuals or organisations that are in a dispute over the quality of goods and/or services given or received. We work as an expert witness for consumers, installation companies, or any other organisation involved with fenestration. We can take instructions from complainants or defendants, either directly or through their lawyers. We can work to single instructions (where we are instructed by one side in the dispute) or single joint instructions (where we are instructed by both sides in the dispute jointly).

Find out more

Featured Services

We offer a wide range of services to the fenestration industry including Installation Inspections and Conciliation and Dispute Resolution


For companies and homeowners alike, if are you having problems in agreeing the way forward from...


Our general day-to-day bread-and-butter works are standard installation...


Very similar in make up to the previously mentioned installation inspections in as much as the...


Approved document seven of the building regulations pertains to materials and workmanship.

Our Clients

Fenestrology have worked with double glazing companies all over the UK

What Our Clients Say

See testimonials from our customers all over the UK
  • Fenestrology Testimonials
    Fenestrology team is top class professionals. I have not expected to get such dedicated help. From the beginning till the very very end. Do honestly recommend them. Professionalism, dedication, care, accuracy... Everything you would expect from top-class professionals. Keep it going! Teach the nation of fenestration!
  • Fenestrology Testimonials
    A great company providing expert advice. I have always found them efficient, reliable and a great source of knowledge. I cannot recommend them highly enough.
  • Fenestrology Testimonials
    It is really rare to see professionalism in the fenestration industry like what I have experienced dealing with Andy and his team. They not only are very knowledgeable about their trade, they are conscientious about the customer's needs. It was a pleasure doing business with.
  • Fenestrology Testimonials
    We just wanted to express our thanks to you and your team for all your efforts since we first met last September. We are grateful to you for quickly ‘getting a measure of us’ as people and for doing everything in your power to improve our situation with the original installation. (more…)
  • Fenestrology Testimonials
    The price tag of engaging a fenestration pathologist was hefty. Would it be worth the money? I can confirm that it definitely was. The inspection covered every single window and door inst (more…)
  • Fenestrology Testimonials
    The course covered a lot of information, delivered in concise chunks that were easy to absorb. The structure was clear, logical and effective. Andy has obviously put a lot of thought and expertise into designing it and certainly knows his stuff and I can see why Fensa and the GGF use Andy to deliver these courses. (more…)
  • Fenestrology Testimonials
    Pity the company didn’t know as much about acceptable PVCu window quality than our Inspector Michael did. His passion and attention to detail whilst inspecting the product was a breath of fresh air following the visits we had already endured from our supplier. (more…)
  • Fenestrology Testimonials
    We would like to thank Mr Clegg for his professionalism and industry prowess! We were on the receiving end of a Fenestration Pathology Report from Fenestrology. We had a Garden room extension go horribly wrong, the company were not interested and seemed fed up with me calling them back time (more…)

Latest Articles in Fenestration

Keep up to date with news from the Double Glazing Industry, Fenestrology posts and case studies