Window & Door Services Cardiff
For more than 20 years, we’ve been providing a valuable service to our customers in and around Cardiff. We strive to provide a fast, clean, and efficient service throughout Cardiff and the Vale of Glamorgan. As part of our ongoing commitment to both old and new customers.
Our small, family-owned business has earned a reputation for providing a prompt, efficient, and dependable service. We are double glazing repair experts who work on uPVC, wood, and aluminium windows and doors for both residential and commercial clients. You can count on us to repair, replace, and maintain your doors and windows to the highest of standards because we’ve been in business since 2001.
Home Improvements & Composite Doors
We supply and install a fantastic range of attractive and highly versatile composite front doors. These doors were created with your Cardiff home’s security and energy efficiency in mind. Free quotes are available, as well as a full supply and installation service.
For your Cardiff home, composite doors provide excellent energy efficiency and security. We’re sure there’s one to suit your home, with a variety of designs and colours to suit your style and budget. We are industry experts who can answer any questions you may have about our products.
From various glazing options and styles to the installation of your new composite doors, we’ve got you covered.
We’re so confident that you’ll love our products and be happy with the service and installation that they all come with a 10-year warranty, allowing you to rest easy knowing you’ve made a wise investment.



Why choose Decorative Glass & Glazing?
- Established for over 15 years
- Approved by Which Trusted Trader
- Fast, efficient and reliable fitters
- Glass and glazing specialists
- We offer Free quotations
- Highly recommended by our local customers
- FENSA registered (number 31498)
- Co. Reg (3982626) Registered in England and Wales (2001)
- Commercial and domestic services available
- Door and window repairs

Window & Door Services Provided
- Window and door repairs
- Velux Windows and Velux Window Repairs
- New window and coloured composite door installations
- Fascias and guttering
- Stained glass
- Broken or misted glass replacement
- Faulty or broken hinges, handles and locks
- Patio door problems
- Draughty or leaking windows, doors and conservatories
- Cat flaps, letterboxes and door panels
- Upgrades on locks and handles
- General home improvement
- Conservatory roof panels
- Free advice from a friendly, reliable company
- For further information & services see our sub heading

Latest Reviews
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Supply and installation of a double glazed 6mm toughened unit Excellent and very professional service. It only took under an hour to replace a very large and heavy double glazed unit into an aluminium framed patio door.
FrankS-20412/04/2020We would highly recommend this firm.They were very thorough, professional, prompt and did a fantastic job of repairing all our windows and doors.. We can’t believe how much warmer our home feels now. No more draughty windows and doors.Looking forward to lower electricity bills in the future! Thank you.
Joanne Williams1/26/2019 -
I have been a customer of this company for many years and they are consistently good. The visits to assess and measure requirements are done quickly and the supply and fitting done very efficiently. When I did have an issue with misaligned decorative leading in one of my units, the matter was dealt with very quickly and fuss free. The fitters are always polite and knowledgeable and leave the place tidy after the job. I find the product is good value for money. I would happily recommend them.
Lillibet Anne1/20/2021would use again definitely Had some minor work done to two doors recently and the work was excellent – the men that came to price and then do the work were very courteous. I would definitely recommend to friends as they were so reasonable, it was unbelievable compared to another quote I received. Also the person the phone was great – very friendly and courteous.
JohnH-173410/08/2019Great Service! I have used Decorative Glass & Glazing twice, and on both occasions they have been great. They are friendly, attentive and above all do a very good job at a fair price. They are extremely clean and tidy, when they left you wouldn’t know they had been there, except for my nice new windows. I highly recommend this company.
TonyC-24210/13/2017 -
I’ve used this company twice now. Once to replace a glazed unit in a kitchen window and most recently to supply and fit a set of sliding doors. On both occasions they provided excellent service, were prompt and efficient and excellent value for money. Highly recommend and will use again.
Peter Mann10/09/2018 -
Just had 3 sealed units fitted first class company, would recommend to anyone, well done Decorative Glass
Jeffrey Seager2/28/2017These guys are great so far they have replaced blown sealed units window handles and a French doors lock for me matching frosted glass patterns perfectly clean tidy jobs saved me loads compared with new windows and doors can’t recommend them enough thank you😀
Gareth Jordan5/04/2019Very satisfactory workmanship and total cost came inside the original quotation based on time actual This is the second occasion of service to remedy minor but significant things — out of alignment front door / impossible to use bi fold door and hinges replacing in bedroom fanlight window. All dealt with promptly and to our complete satisfaction . Highly recommended by us. Dave Burston/ Cardiff
CarysB-512/11/2017 -
Brilliant affordable service from start to finish. Replaced window hinges and handles, also some misted windows. Many thanks👍
Michael Donnelly10/21/2020Prompt, reliable, punctual, polite and pleasant staff. Excellent job completed within the promised time scale.
Susan North2/16/2018Superb service! Excellent company , i required a replacement window that had become misted over time as the seal had be broken. This company provide a great service , i had a same day call out and quote within 24hrs . the gent who attended was very polite and helpful. To top it off the price was very competitive!! Thank you 🙂
Phil Jones8/07/2020 -
Satisfied Customer I was recommended to this Company by a colleague. I had several double glazed units replaced and I was very impressed. The fitters who came out were clean and efficient. I would definately use this Company again.
Jes11sie1/24/2013 -
testimonial From the initial telephone enquiry to the completion of the job, professionalism and courtesy of the staff were outstanding. Times and dates were adhered to as well as the price quotation and we were kept informed by e-mail or phone. I would unhesitatingly recommend this company.
Anthony Leader8/15/2019 -
Very efficient and speedy service. We had to replace one double glazed panel due to it being blown. Will use again and would recommend.
Ian Pearson10/25/2018door repair I have used this company before and each time have been extremely pleased with the finished job. They are proficient and punctual friendly also. I would be happy and confident to call upon them in the future.
Margaret Worbey11/26/2019 -
Fab people,helpful & 100% reliable. Job done quickly too! I would highly recommend them to anyone looking for window work.�
Elizabeth Stickler11/08/2016Door and window repair Not the lowest prices but they are very reliable, they turn up on time and do the job as requested. Easy to speak to them as there is always somebody at the office.
SoF-212/12/2017Disappointed Like the other review, i had a recommendation but this was from someone who had decorative glass not double glazing side….i was very disappointed. Am looking to have replacement windows and porch this summer but in the meantime needed a few repairs:, 2 of which were good but the other so poor it cancelled all the good equity of the others!!!! They have come back and redone but this meant I had to take another half day off work. Thankfully I took before and after photos as proof. Still not entirely right but I don’t want them back. I will have to look elsewhere now for my replacement windows!
BANDP1/30/2013 -
I was delighted to learn that the guys were able to rotate my existing window contrary to advice from another company. They did a very clean and efficient job of this and replacing a misted window in our garden room. Excellent service and excellent value. It’s made such a wonderful difference to the view onto our garden. Thank you so much!
Rachel Jones3/28/2021 -
Glass Replacement Great Job and cannot fault the service
Umran Malik11/14/2019Excellent company Recently had a replacement double glazed unit fitted and received the usual excellent service I have come to expect from this company. Have used them a number of times in the past for various repairs and have always been satisfied. I would have no hesitation in recommending them.
PJB-19963/29/2021 -
excellent prompt service Very pleased with the glazing provided and the care taken by the fitters to meet our requirements, first class .
dave dee11/12/2021
Contact Us About Window & Door Services Cardiff
For more information on uPVC window & door repairs or if you are looking for brand new composite doors for your home in Cardiff & the surrounding area, contact our trusted team. As experts in our industry we are equipped to assist you with any questions you might have.
To book a consultation with us, simply contact us directly and one of our experts will assist you with your enquiry.
Guarantees/Warranties are insurance backed on all doors and windows installed.
Guarantees/warranties are not insurance backed on all the other items installed.
Where we are unable to resolve your complaint using our complaints procedure, as a which? Trusted Trader we use dispute resolution ombudsman for dispute resolution.
In the unlikely event that we cannot remedy your complaint to your satisfaction you may wish to refer your complaint to them.
If you wish to do so please contact Which? Trusted Traders in the first instance on 03332413209.