Window & Door Services Cardiff

For almost 19 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, the Vale of Glamorgan, and the South Wales Valleys 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.

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.

decorative glass & glazing co ltd white branded van
which trusted trader logo
What You Need To Know About Your Window Installer

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
modern stained glass panels mixed colours

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
Glass Fitting & Repairs Explained
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Latest Reviews

  • 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 Jones

    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.


    would 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.

  • excellent prompt service Very pleased with the glazing provided and the care taken by the fitters to meet our requirements, first class .

    dave dee

    Brilliant affordable service from start to finish. Replaced window hinges and handles, also some misted windows. Many thanks👍

    Michael Donnelly

    Very 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

  • Used to service / repair gap in conservatory doors. From initial assessment visit to actual service / repair the service we received was very good – prompt, polite, clean and everything explained. Will definitely be keeping their number for future use �

    Taff Jones

    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 Anne

    First class service from office staff and fitters , best quotation received, fitters were very friendly , efficient and clean, will certainly use them again and refer them to all family and friends. Thank you all.

    Tony McCarthy
  • Just had 3 sealed units fitted first class company, would recommend to anyone, well done Decorative Glass

    Jeffrey Seager

    Would use again Efficient, reliable and reasonable. We had 4 double glazing units replaced and were very happy with the overall service and product. Would recommend.


    Very impressed with this company, would use again

    Keith Lewis
  • door 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 Worbey

    My family has used decorative glass on two or three occasions always efficient show up when they say they will and do a top notch job in good time. Thanks for the great work guys i’m sure there will be more for you in the future

    Sion Dean

    These 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 Jordan
  • I’m very pleased with the service I have received. My new doors look amazing. Quality product fitted by professional people. Would recommend to anyone and not over priced so will be using this firm again.

    Tina Manley

    Excellent service very happy with our new windows!

    Katherine Board

    Excellent service, fast efficient, good price, I would recommend this company. Great work on the stained replacement units they look fab.👍

    Don O’Driscoll
  • Very competitive prices and quick, friendly and efficient service. Would highly recommend.

    Fay Harding-Lewis

    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 Leader

    Amazing company came out on time, very professional and highly recommend

    Umran Malik
  • 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 Pearson

    Friendly, helpful, reliable. Excellent work and they listen. Quick.

    Giselle Martinez Evans

    Brilliant service.
    Quick efficient and Friendly staff
    Would definitely recommend

    Lauren Sullivan
  • 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.


    Great service repaired my windows. Really professional highly recommend to people

    Sharon Robbins

    Excellent in every way – very competitive price, the office staff were responsive and helpful, and high quality windows fitted well. Thank you.

    hugo cosh
  • amazing stained glass artist! Had stained glass windows installed from this company a few days ago and am so pleased to say what a wonderful job they did, the workmanship was faultless and the fitters were on time and very tidy would definitely recommend this company.


    Superb 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 Jones

    Glass Replacement Great Job and cannot fault the service

    Umran Malik
  • Would definitely recomend & use again Friendly quick service at great prices


    We 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 Williams

    Excellent 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.

  • Door 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.


    Communication via messenger was fab, arrival time and work carried out was very professional. Both fitters arrived with PPE and removed their shoes to go upstairs. Fantastic efficient service, will definitely call on these guys again if needed😊

    Sarah Davies

    excellent service from start to finish. I had some new Double glazed units and hinges fitted. Excellent service from start to finish. Would definately have this company back for any future work and would highly recommend them.

  • Really efficient service, friendly staff and competitively priced . Would definitely recommend .

    Claire Bamsey

    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 Mann

    Prompt, reliable, punctual, polite and pleasant staff. Excellent job completed within the promised time scale.

    Susan North
  • Fab people,helpful & 100% reliable. Job done quickly too! I would highly recommend them to anyone looking for window work.�

    Elizabeth Stickler

    Great 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.


    Very professional service from start to finish highly recommend

    Susan Potter
  • Disappointed 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!


    Very happy with the repairs to my windows, good as new

    Susan Green

    I have used this company since 2015 and would definitely recommend. They are friendly, helpful, reliable and fast service.

    Scotty Vikmeister

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.

Code of Conduct
As a Which Trusted trader, our business has been through a rigorous application process so you can be confident you are hiring a reputable trader.

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.