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Endorsed by Which? Trusted Traders

Welsh Window Systems

Profile thumb welsh window logo

200 Reviews

Opening Hours
Today - 09:00–12:00
  • Monday 08:00–17:00
  • Tuesday 08:00–17:00
  • Wednesday 08:00–17:00
  • Thursday 08:00–17:00
  • Friday 08:00–16:00
  • Saturday 09:00–12:00
  • Sunday - Closed


Welsh Window Systems was formed in 1987.
We are a small family business with eight employees.
We are now in our 34th year and our installation and customer care standards are the highest within our industry.
We supply, repair and install all Pvcu, Aluminium and Timber windows and doors.
We are specialists in Aluminium BI-Folding doors.
We service both commercial and domestic customers and tackle any job from a broken handle to a full installation of windows and doors.
We have a specialist repair side and service many commercial and domestic installations.
Recent repairs include changing hundreds of friction hinges to multi high rise offices.
Some of our customers include The Royal Mint, Arup, The M.O.D
Cardiff Wales Airport, Bristol Airport, Home Office and Mrs Jones
We treat all customers with total respect,courtesy, honesty and integrity.
We are an Ethical company and have also have installed running water into 84 homes and helped thousands of children in Sri Lanka after the terrible Tsunami.

What we do

  • Glaziers

    • Double glazing installation
    • Double glazing repair
    • Glass boarding up and replacement
    • Replacement window services and repairs
    • Sash windows
    • Aluminium Windows
    • Velux windows
    • UPVC Windows
    • Double glazed units
  • Doors

    • Bi-fold doors
    • Patio doors
    • Fire doors
    • ​Aluminium doors
    • Composite doors
    • Door repairs
    • Front door
    • French doors
    • Timber doors
    • UPVC doors
  • Locksmiths

    • Emergency locksmith service
  • More Services

    • aluminum stacking
    • specialist locksmith
    • windows

Customer reviews

Why you can trust these reviews

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100% of the reviews we publish have been through our stringent moderation process.

200 reviews
Customer Service
Sort by
High standard
Customer Service
I had new front and back doors fitted, kitchen and bathroom glass units replaced also old windows were adjusted. Very pleased all old doors and rubbish taken away, new doors specific to my request, back door stable type also front door sprayed to my chosen colour. Excellent price, fitted on day to suit, very professional, amazing team and tidied up. Everyone including the ladies in the office was very helpful. I am so pleased I chose welsh window systems Barry and highly recommend them.
Customer in Vale of Glamorgan Posted on 30/11/2021 , work completed 18/11/2021
Patio door install
Customer Service
Absolutely fabulous, what more can I say. Wanted an existing window and wall removed and replaced with a sliding patio door and I knew as soon as Nathan turned up for the quote and survey I was in good hands. There was no hard sell, and within 5 minutes I had ballpark figures for all options available and a time scale for work to be carried out. When the job did start I could not believe how professional Nathan and his team of Kieran and Jacob were, I was expecting a lot of mess and dust but they cleared up as they worked leaving the place spotless at the end of the day. The team worked tirelessly on probably the two hottest days of the year. Nathan took his time in making sure everything was absolutely spot on, and even got his lovely wife Kelly to muck in on the last day as the rest of his team were busy on other jobs. The patio door looks fabulous and I can't thank Welsh Window Systems enough. I need the rest of the windows doing in the future, I will have no hesitation in contacting Nathan. Thanks again Nathan and your amazing team.
Customer in Vale of Glamorgan Posted on 29/07/2021 , work completed 20/07/2021
Patio door replacement
Customer Service
Having dealt with Welsh Window Systems on a number of occasions I was confident that they would do a professional job replacing very old patio doors (broken opening mechanism) with new. Their quote was not actually the cheapest but my previous experiences influenced my decision to get them in. It was explained clearly that material supply would be a potential problem and so I was not overly disappointed that it took some three months from receiving the original quote to the actual installation. Andrew and Kiernan arrived promptly and the job was easily completed in one day. Everything was done in a tidy fashion - inspecting the area around the patio doors after they had left I could not find any signs that they had even been there. In fact I was not even disturbed during the whole time they were here - they were unfailingly polite and helpful from start to finish. I would, of course, highly recommend the services of Welsh Window Systems to friends and family.
Martin in Cardiff Posted on 25/06/2021 , work completed 07/06/2021
Swiftly and with Style.
Customer Service
I wanted to replace 7 double glazed units in three of my windows. Welsh Windows System was measuring my daughter's bathroom window, in her house around the corner, for an emergency repair. I ask Nathan if he could call in when he could fit me in for a quotation. He kindly called in to see me the same day as soon as he had finished at my daughter's house. On the 31st March, I received my quotation and was pleased with the price and the approx 4-5 weeks completion date. The work was in fact completed on the 19th of April which was great considering the Easter weekend fell during that period. The work was completed quickly with no fuss with the minimum amount of disruption. Special thanks to the guys for their care and understanding when moving in and out of the property as we have 6 cats who do not leave the garden. I cannot praise this company enough and would recommend them to anybody.
Lyndon in Vale of Glamorgan Posted on 26/04/2021 , work completed 19/04/2021
Highly recommend this company
Customer Service
Fantastic service and products from Welsh Window Systems. We had patio doors removed and fitted, front door bricked up and a new door put in a different position. They did it all on time and to agreed budgets. Infact they exceeded our expectations in their approach, care and workmanship. They were so tidy and when it was all done everything was left immaculate. I can't recommend them enough. Cavan did our original quotation and Nathan, Kieran, Jacob and Andrew came to do the work. All were so friendly and their attention to detail amazed us. Thank you.
Siobhan in Vale of Glamorgan Posted on 15/04/2021 , work completed 02/04/2021
Professional, punctual and polite
Customer Service
After reading their reviews here on Which trusted traders we contacted WWS to get a quote for 6 windows plus a new front door. Cavan called to our home and we explained what we were after. We found what we wanted and Nathan called and took all the measurements etc. Andrew and Jacob were responsible for the fitting. These guys were all punctual, polite and respectfully of both property and possessions. During the removal of the old and then the fitting of the new every care was taken to ensure that mess etc was kept to a minimum. Dust sheets covered all our floors/carpets and what little mess they did make was quickly cleaned. Any fittings such as blinds were removed and replaced with care and attention and the guys were courteous and polite throughout. My wife and I are both delighted with our new windows and door and likewise with the service we received from Welsh Window Systems and have no hesitation in recommending them to anyone looking to get new windows or doors.
Customer in Merthyr Tydfil County Borough Posted on 17/03/2021 , work completed 08/03/2021
Concrete shed replacement window
Customer Service
This is the second time we have used Cavan and his team and once again are delighted. No job is too small for them and we were quoted the lowest price available but chose a higher specification of glass. Andrew and Kieran arrived within an hour of the quoted start time and were quick, professional and friendly. We were particularly impressed by how much they tidied up as the job proceeded. We are very happy with the result.
Peter in Cardiff Posted on 19/01/2021 , work completed 18/01/2021
Replace existing glass roof with composite tiled and insulated roof
Customer Service
Cavan and Nathan run a very tight ship, from the scaffolders, fitters, electrician, plasterer and delivery of timber roof structure and upvc, right through to completion. The boys are prompt, courteous and experts in their fields. Each stage was co-ordinated to ensure the smooth running of the jobs to be completed ie: Roof and walls prepared...electrician arrived, electrics completed, plasterer arrived and everyone observed Covid regulations at all times. Cavan is extremely knowledgeable in his field and gave us excellent advice throughout. The boys work in harmony and cleaned up every night in preparation for the next day. There were no hidden costs or glitches and the roof has transformed our home - not only does it look amazing but has warmed up the house and created an all year round. living space. Thank you Cavan, Nathan, Jacob and Andrew.
Customer in Vale of Glamorgan Posted on 04/01/2021 , work completed 07/12/2020
Conservatory roof replacement
Customer Service
This is the second time I have used Welsh Windows. Last year I had some bedroom windows replaced. They did such a great job, I had them here again to replace my polycarbonate conservatory roof. They have done a brilliant job! The roof is now a solid tiled one with glass panels down each side. The difference inside and out is superb. It is now, not a conservatory, but an extension to our home. The ceiling is plastered and has lights inset and also around the edge in the soffit detail around the top of the windows. Which is lovely. As usual the guys were great, especially with the Covid issue etc. Cleaning up after themselves and I have no qualms about recommending Welsh Windows. I will certainly be using them again in the future to replace other windows too. The price was very fair, and they always go the extra mile to make sure everything is completed to the best of their ability, like for instance, adding insulation where none was present in the existing structure. Nothing is too much trouble. Which is very reassuring indeed.
Customer in Bro Morgannwg Posted on 21/12/2020 , work completed 18/12/2020
Beautiful windows and french windows installed with great care and minimum fuss.
Customer Service
I had a few quotes for replacing three windows and a set of french doors in my barn conversion. Cavan was not the cheapest quote, but he went the extra mile in attending the home and explaining the type of windows he recommended and was totally upfront about the difficulties the firm was having sourcing their windows due to Covid19. As soon as the windows were available an appointment was made to fit them. The receptionist on the phone was very friendly. The fitter, Nathan I believe, was cheerful and friendly and protected everything with sheets and cleaned up afterwards. The windows look great and work really well and I am so pleased with them. Nathan demonstrated the clever mechanism which makes cleaning the windows upstairs possible. Great company, great windows, great workmanship. Well done!
Customer in Vale of Glamorgan Posted on 17/12/2020 , work completed 16/12/2020