We are your local Supplier and Installer for you new uPVC Vertical Sliding Windows in Bristol, Bath, Gloucestershire, Somerset, Wiltshire and surrounding areas.

Vertical sliding windows are more commonly found on older style properties, particularly in period homes, and are usually made from timber. Despite this elegant charm, real timber windows are expensive to replace. BS15doors supply and install uPVC vertical sliding sash windows so you can rest assured that you are installing a cost-effective solution that will continue to suit and enhance your home. Our uPVC sliding sash windows are made from modern materials and you benefit from the latest performance standards of security, low maintenance and energy efficiency.

uPVC Sliding Sash windows WILL enhance your home. With a wide variety of colour and hardware choices, you can easily create the desired look for your property. We are able to provide sash windows in a range of styles to match your existing windows as closely as possible. We can also supply and install arched and swept head style windows, these are particularly pleasing to the eye. We also have additional Glazing design options, like internal Georgian bar detail, or external Astrigral bars.


Its always the ‘little details’ that make all the difference. To make our uPVC Sliding Sash Windows replicate existing Timber Box Sash windows, we incorporate Sash Horns, Astrigal Bars and traditional window hardware.

Why not complete your Sliding Sash Window with enhancing hardware, such as Pole Eyes, Tilt Knobs, Sash Lifts, Sash Locks & Travel Restrictor are fitted as standard. D-Handles are also an option. All glazing is Toughened as standard.


Our uPVC Sliding Sash Windows operate in the similar way as your existing wooden box sash windows, in that both the top and the bottom sash slide upwards and downwards. The two sliding sashes in the outer frame, work independantly of each other, on a balance load mechanism, so the sash will hold at any height.

Our uPVC Sliding Sashes have a inward opening Tilt facility to allow Safe and Easy cleaning of the outside face of the glass and frame, from inside your home. This is very useful for windows that are situated in those hard to reach areas.

Our uPVC Sliding Sash Windows are very Low Maintenance, they just need a quick wipe over with a damp cloth, this helps to keep them look as good as new!


5 Star Customer Rating

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All our products come with a 10 year warranty as standard


Whether it's our windows, doors or lantern roofs, we offer a minimum rating of A for energy efficiency


BS15 Doors have been supplying and installing windows & doors for over 25 years across Bristol


Well what can I say about bs15 doors.

Well what can I say about bs15 doors. Absolutely 100% would recommend these guys. From ringing them up I had someone come out to my house the next day to measure up who was very friendly and made me feel confident in my decision to go ahead with getting my doors supplied and fitted with this company.

Kelly Palmer

Really really happy with my new front door.

Really really happy with my new front door. Communication with Ruth along the way was very easy and she always replied promptly, and the fitters did a perfect job! The price was the cheapest I got too. Definitely recommend them.

Susie Howells

Smooth communication from initial consultation to final installation.

Smooth communication from initial consultation to final installation. Professional service, reasonable price, definitely recommend. We had our front door, three windows replaced by BS15 Doors, definitely coming back for the rest of windows, thank you!

Han Lynn

Would definitely recommend BS15 doors.

Would definitely recommend BS15 doors. The service was great, the product is great and the price was very competitive.

Mike Norman

Top service from start to finish.

Top service from start to finish. From measuring up to supply speed and fitting. Ruth and John both excellent throughout. Cheapest quote by a long way in my local area and quickest turnaround to get them fit too. Will definitely use again on my next renovation project.


Definitely worth getting a quote from them.

The guys who fitted did an excellent job, showing me issues that had been identified earlier and how they have dealt with them. Windows have now been in place for quite a few months now and we have had no issues with them through any of the storms we have recently had.

Colin Gimblett

Fantastic service from start to finish.

They listened to what I needed, made suggestions and generally supported and kept me informed throughout. They turned up when they said the would with a quick efficient team who were in and out in less than 3 hours. New front door, overhead canopy and two windows! Great price too. We had quotes from other firms. But they lacked the customer service and personal youch that BS15doors gave.

A Peters

Great experience from initial enquiry to installation!

Ruth and John delivered a personal and instructive service and the door looks great. The chaps who installed it were friendly, professional and neat and tidy also and to top it all they offer competitive prices and good customer service too. Would recommend.

Elspeth de Boeck


Contact us for a free no obligation quotation