A Which? Trusted Trader

Coral is proud to be a Which? Trusted Trader since December 2017. We have received a rigorous assessment from Which? to become endorsed as a company all of our clients can trust to achieve outstanding results on their projects.

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Terms and Conditions

June 2026 Free Upgrade To Triple Glazing offer Terms and Conditions:

  1. The “Free Upgrade To Triple Glazing offer” is available on qualifying orders placed between 01.06.26 & 30.06.26 while stocks last.
  2. Free Upgrade To Triple Glazing offer” must be stated in writing on the contract at the point of sale.  Coral cannot be held responsible for claims placed after this time.
  3. Code JUNE26 must also be clearly marked on any contract to qualify for this offer.
  4. The “Free Upgrade To Triple Glazing offer” applies to standard double-glazed casement windows only (excludes flush sash windows and sash horn casements) in any of the following foiled, grained finishes in our range: Agate Grey, Anthracite Grey, Anthracite Smooth Matt, Black Ash, Black Smooth Matt, Cedar Grey, Chartwell Green, Claystone, Cream, Golden Oak, Grey 004, Grey Aluminium, Honey Oak Super Matt, Irish Oak, Nut Tree, Pepper Oak, Rosewood, Slate Grey or Yakisugu (external frame colour only, inside must be smooth White), manufactured by Coral only & where goods are installed within 12 weeks of order date.
  5. The “Free Upgrade To Triple Glazing offer” cannot be applied to conservatory frames.
  6. The “Free Upgrade To Triple Glazing offer” does not apply to Smooth White uPVC or White grained uPVC casement windows.
  7. The “Free Upgrade To Triple Glazing offer” is an upgrade to our “Standard Triple Glazed Range”, it does not include our CL3 Triple Glazed Range.
  8. The “Free Upgrade To Triple Glazing offer” does not apply to tilt & turn windows, uPVC doors, uPVC French doors, composite doors, inline patio doors, Inox doors, Rock Doors, uPVC bi-folding doors, aluminium bi-folding doors, conservatory roofs or V/S windows.
  9. The “Free Upgrade To Triple Glazing offer” cannot be used in conjunction with the “50% Off On Selected Items Offer”.
  10. There is no minimum order value to qualify for the “Free Upgrade To Triple Glazing offer”.

June 2026 50% Off On Selected Items Offer Terms and Conditions:

  1. The “50% Off On Selected Items Offer” is available on qualifying orders placed between 01.06.26 & 30.06.26.
  2. 50% Off On Selected Items Offer” must be stated in writing on the contract at the point of sale. Coral cannot be held responsible for claims placed after this time.
  3. Code JUNE26 must also be clearly marked on any contract to qualify for this offer.
  4. The “50% Off On Selected Items Offer” can be applied to conservatory frames providing they are not included in the listed exclusions below.
  5. The “50% Off On Selected Items Offer” does not apply to Inox doors, Rock Doors, hybrid uPVC bi-folding doors, aluminium bi-folding doors, conservatory roofs or Vertical Sliding Sash windows.
  6. The “50% Off On Selected Items Offer” offer does not apply to any building works, internal sills, window boards or trims.
  7. The “50% Off On Selected Items Offer” cannot be used in conjunction with the “Free Upgrade To Triple Glazing offer”.
  8. There is no minimum order value to qualify for the “50% Off On Selected Items Offer”.

Lowest Price Guarantee terms and conditions:

Our price promise has held Coral in good stead with our customers for over 35 years. We will not be beaten on price (please refer to terms and conditions below for further details when comparing to other quotes from other companies), they must have:

  1. The specification of the product must be fully sculptured 70mm profile.
  2. The styles and sizes must be detailed on a letter headed quotation.
  3. Conservatory frames – windows and doors should be of the same quantity, styles and design specification.
  4. Conservatory roofs – must be of same design specification.  “Tiled” conservatory roofs must be Ultraroof.
  5. Warranties for each of the products must either be the same of better.
  6. Have an Insurance Backed Guarantee (where work is covered by FENSA).
  7. Have a BSI kitemark for survey and installation.
  8. Be FENSA regulated.
  9. Manufacture their own products.

It is important to bear in mind that Coral Windows and Conservatories have been in business with continuous trading for over 32 years and we do not take a deposit or stage payments and only ask for payment when the goods are installed. This gives you, our customers 100% peace of mind.

Our CL3 Triple Glazed Range and other triple glazed windows are subject to size restrictions and style limitations due to the weight of the glass – see your representative for details. The maximum size for any triple glazed glass unit is 1.7m2 due to health & safety reasons. Where a required unit size is larger, an A-rated double-glazed unit will be supplied and installed.

“Self-cleaning” glass is not a ‘100% maintenance-free’ product but does offer a reduced need for manual cleaning.

 

*New windows from Coral could save our customers hundreds of pounds on their heating bills*

You can check both your potential savings on heating costs and your CO2 savings by entering a few simple details into our energy calculator which can be found on our website https://www.coralwindows.co.uk

As an example, a typical customer (living in a semi-detached house which has wooden single glazed windows and mains gas heating) could save approx. £911 on their heating bill over the course of the first 12 months after they had new double-glazed windows installed by Coral Windows (information correct as at 13/10/2023).  Potential savings will vary depending on the information entered into the energy calculator.  

See What Our Customers Are Saying About Us!

Over 200 reviews

4.8
234 reviews
Customer Service
4.8
Quality
4.8
Value
4.7
Excellent work surpassed my expectations with the work.
Customer Service
Quality
Value
The double glazing was undertaken to replace bathroom window, hall window, side door. 3 composite doors long kitchen window and bottom facia to the kitchen. All the above was fantastic the workmanship was outstanding. The customer service was really good. Coral provided excellent communication and any aftercare that if needed is available. The budget price was perfect. I have to give a special mention for the service engineer who fitted everything outstanding with the work undertaken.
Customer in West Yorkshire
Posted on 08/06/2024 , work completed 06/06/2024
Windows
Customer Service
Quality
Value
The men were spot on cleaned up after they finished and never stopped till they finished did a brilliant job even cleaning the garden it is so nice not to have wet running down my window house is warmer would de recommend Corral Windows Mr And Mrs Greenwood
Customer in West Yorkshire Posted on 14/02/2025 , work completed 05/02/2025
New windows
Customer Service
Quality
Value
The quality of service from start to finish was excellent. The sales and survey people were very thorough and the workmen Lee, Mark and Phil were the hardest working tradesmen we have had at our house. Would highly recommend Coral Windows to anyone
Customer in West Yorkshire Posted on 15/02/2025 , work completed 07/02/2025
Replacement Windows
Customer Service
Quality
Value
Coral turned up when they said they would this was for the initial appointment, survey appointment and fitting, work was completed with very little disruption to the household. Both fitters were great guys cleaning up as they fitted so no extra cleaning for me. I would highly recommend Coral.
Customer in West Yorkshire Posted on 21/02/2025 , work completed 04/02/2025
Highly recommended
Customer Service
Quality
Value
We have had 8 replacement windows supplied and fitted by Coral windows which are of the highest quality and the fitting was taken with the upmost care with all the old windows and rubbish taken away and everywhere left clean. Would highly recommend Coral Windows to anybody requiring new windows like we were.
Customer in North Lincolnshire Posted on 05/07/2025 , work completed 30/06/2025

How we became a Which? Trusted Trader

Which? Trusted Trader is a program developed by the consumer watchdog organisation Which? to help consumers find reputable tradespeople and businesses. Coral underwent assessment by 'Which?' in 2017, with their trading standards professional ensuring we met the stringent criteria set out to obtain our 'Which? Trusted Trader' endorsement.

We have continued to meet these criteria as Which? Trusted Trader conduct regular and ongoing checks with those who have achieved endorsement to make sure they still meet the exceptional standards needed.

The assessment started with a detailed application that included information about our business, qualifications, experience, and customer references. This initial step allows Which? to gather essential background information about the company.

The Which? Trusted Trader Assessment process included various independent reports on all aspects of our company to provide certainty in their findings, ensuring we are reliable and trustworthy, and sealing our reputable services with their approval.

These assessments include four main components: Customer satisfaction, Interview and Assessment, Business Procedures, and Credit Report.

Customer Satisfaction

The Which? Trusted Trader team contacts a selection of recent customers from a company's most recent work to check references and satisfaction with the work that has been completed for them.

Interview and Assessment

The visit includes an assessment of various aspects of the business such as administrative processes, documentation and complaints procedures. There's also an in depth interview carried out by the trading standards profession to understand every aspect of how the applicant's business operates.

Business Procedures

Which? Trusted Traders must meet the Which? Code of Conduct, and 'What is expected of you?' document within their business procedures. These documents cover every aspect of business conduct, documentation, and outcomes, intending to create the best possible service for customers.

Credit Report

There is a thorough credit report check completed to assess the financial health of a business by determining the lending reliability and payment history of a company.

"Recognition is something we all strive for in life and being recognised for the work we do is extremely fulfilling, we are very proud to be one of the few companies that hold this prestigious accreditation in our industry. This accreditation gives many of our customers piece of mind knowing they are dealing with a professional and experienced business. A business that provides high quality products and excellent customer service, which we have managed to deliver to our customers over the last three plus decades."

John Valente Managing Director, Coral Windows

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