“What our clients say”
“We were going to replace the polycarbonate on our conservatory roof but we were advised by Sharon that short term it would be much better to put the doors and window back in between the kitchen and the conservatory. Great advice and worked out cheaper than our original plan. Would definitely use them again!”
“I’ve just had a front door replaced, patio doors repaired and several windows renewed from a previous less than satisfactory company. Sharon kept me fully updated with pricing, ordering, delivery and fitting. Customer satisfaction is obviously important to this company unlike the previous company I’d employed.”
“I have had a significant number of windows and front door replaced including the encapsulation of the original 1930’s leaded lights by Knowles Stained Glassworks and I could not be happier. Would highly recommend. They are now working on the windows for my planned extension.”
UPVC Windows
'A' Rated UPVC Windows from Knowles Stained Glassworks
At Knowles Stained Glassworks we understand the importance of having the correct type of windows as they are essential to each home. They further the style and the look that you want to achieve, and also play a key role in the energy efficiency of your property. It is vital that the windows you purchase today will still be performing in years to come.
Read More
We install UPVC Windows which are Energy 'A' Rated. Each window system is manufactured from materials that are extremely high quality and obey with the British Standards Institute.
UPVC Windows from Knowles Stained Glassworks
Knowles Stained Glassworks make it their priority to help both domestic and commercial customers in feeling safe and secure within their property. We seek to find a UPVC Windows unit that complements the scenery of your home and offers durability and security with high standard security locks and hinges. Over many years, our knowledge and experience within the glass industry has helped Knowles Stained Glassworks deliver excellent UPVC Windows.
It is important to us that every installation that is carried out is attended to with care and expertise. We are Certass approved so you can be assured that your installation complies with all Government regulations and you will also receive an insurance guarantee from CPA (Customer Protection Association).
UPVC Windows Built to last
As our UPVC Windows are built to last year after year you can forget about warping, discolouration, leaks and draughts as our expert team of installers guarantee that each unit installed presents long term performance, so you can be confident that you made the right choice.
Knowles Stained Glassworks offer UPVC Windows with style & security
Our UPVC Windows are available in a host of different styles and designs and are complete value for money as they are aesthetically pleasing, offer long term durability and are energy efficient. Each window is custom made for our client’s property and are fitted with hinge claws and multi point locking. We have installed many of these window systems in homes around London, Surrey and Sussex.
In the last 45 years, Knowles Stained Glassworks have built an excellent reputation in providing the highest levels of customer service. If you have an enquiry and are based in Horley, Crawley, Surrey, London, Sussex or The Home Counties, we can help you repair or design new UPVC Windows today. For more information, please get in contact with us on 01293 278326 or alternatively, send us an email or message via the website.
Read Less
Company Accreditations & Memberships
UPVC Windows – Image Gallery
Why Choose Us
Suited For All Budgets
We can help you find the right Windows, Doors and Conservatories as we have an extensive range of products available, no matter how big or small the budget.
Fantastic Guarantees
Our high quality goods and guarantees last up to 10-20 years, offering customers peace of mind and allowing them to enjoy their purchase for many years.
Energy Efficiency
We install A & A+ rated windows that can help you save hundreds of pounds a year on your energy bills. See how much you can save via our free quotation.
Customer Satisfaction
This plays an important role within our business and we always want to make sure that our customers are happy with the service we provide.
What Our Customers Say
“We were going to replace the polycarbonate on our conservatory roof but we were advised by Michael that short term it would be much better to put the doors and window back in between the kitchen and the conservatory. Great advice and worked out cheaper than our original plan. Would definitely use them again!”
- Customer in Horley
“I’ve just had a front door replaced, patio doors repaired and several windows renewed from a previous less than satisfactory company. Sharon kept me fully updated with pricing, ordering, delivery and fitting. Customer satisfaction is obviously important to this company unlike the previous company I’d employed.”
- Customer in Merstrum, Surrey
“I have had a significant number of windows and front door replaced including the encapsulation of the original 1930’s leaded lights by Knowles Stained Glassworks and I could not be happier. Would highly recommend. They are now working on the windows for my planned extension.”
- Customer in Bedfordshire
Download a Brochure
We have a large range of product brochures available to download. For more information on our Windows, Doors, Conservatories etc, please call us on 01293 278326.
