Our Ace Double Glazing accreditations stand as a testament to our unwavering commitment to quality and regulatory compliance. By choosing us for your replacement windows, doors, or conservatories, you’re not only getting exceptional craftsmanship but also the assurance of adhering to the UK’s stringent energy efficiency standards, as outlined by our FENSA certification. Navigate through our accreditations page to discover how we uphold industry standards, ensuring your installations are a perfect blend of quality, efficiency, and compliance​



Thanks to new government building regulations there are minimum standards of energy efficiency that windows, door and conservatories fitted in the UK must meet. The new building regulations known as “Document L” (J in Scotland) set energy efficiency targets to reduce heat loss from frames and glass to help Great Britain meet the commitments as set out in the Kyoto Agreement relating to energy consumption and green house gases.

To ensure that you fit replacement windows that meet these new standards, the glass and Glazing Federation teamed with other industry bodies to produce FENSA – the Fenestration Self-Assesment Scheme. By choosing us to complete your work we will provide you with a certificate comfirming that your new installation complies with these new regulations.


Ace Double Glazing is proud to be a trusted member of Checkatrade, ensuring reliable and quality service for all our customers. With our Checkatrade membership, customers can have peace of mind knowing that Ace Double Glazing has been thoroughly vetted and consistently delivers exceptional results.

Energy Rating Kitemark


BSI British Standards is the UK’s national standards organization that produces standards and information products that promote and share best practice. It serves the interests of a wide range of industry sectors as well as governments, consumers, employees and society overall, to make sure that British, European and international standards are useful, relevant and authoritative.

BSI regularly test our products and we are pleased to say that they all meet and surpass the requirements for the following accreditations; This standard details the expected performance of PVCu extruded hollow profiles, specifying requirements for raw materials, construction, safety and weather resistance ensuring they meet strict criteria suitable for the intended use.


BS7412 PAS24 Windows

This is the improved security performance of casement and tilt and turn windows. The standard details the test methods and criteria which must be met to provide reasonable security against unauthorised forced entry.


BS7412 PAS24 Doors

This is the improved security performance of casement and tilt and turn windows. The standard details the test methods and criteria which must be met to provide reasonable security against unauthorised forced entry.

Buy With Confidence

Buy with Confidence

We are proud to be an approved memeber of the Plymouth County Council Buy with Confidence scheme, so you know you are safe hands with Ace Double Glazing.


Customer service is second to none!!!!

Could you please pass on our thanks to your whole team who have been excellent, customer service is second to none!!!! The gentlemen who fitted our door today are an absolute credit to your company and they have done a super job of fitting the door and tyding away.  They were prompt, courteous and on time.

Judith Moss

Product was great

Can’t fault them. Product was great. Team was great. Acoustic glass is brilliant; so much quieter!

Realise that this is another Peacock Blue door. But, it is a lovely colour.

Ben Payne

Many thanks Ace

We are so pleased with our two new exterior doors, from start to finish it has been a very professional and courteous service. The guys who fitted the doors have done an excellent job. I would definitely use Ace again, and would highly recommend them. They have great customer service and meet all our expectations.

Jacqui Barraclough

Would definitely recommend Ace double glazing.

Our new patio doors are every bit as good as we hoped they would be. Sam and Chris have just finished and they’ve done a brilliant job. They were friendly, efficient and professional. The new door looks great and every bit of the old one was removed without a trace. And Sam and Chris made sure everything was clean and tidy before they drove away.

Nicholas Whitehead

Very improfessional

A couple of months ago i had a new bathroom window fitted and i was so impressed by the quality and the professionalism that i saved up to get my patio doors done as they were letting in huge amounts of draft (think curtains blowing!). The guys came out and again did another excellent job. Im now saving for the rest of the house to be done. Thank you!


Excellent Service

Excellent Service – really pleased with the quality. Staff helpful and efficient.

Alison Midwinter

Thank you for such fab service

Thankyou for such fab service from initial contact right through to fitting. Great communication from Carla at all times during the process and nothing too much trouble. So pleased with our door and the fitting and the quality of the product advised. If we require any windows or doors in future we will use Ace with complete confidence.

C Harding

Excellent service from start to finish

Excellent service from start to finish. So impressed with professional no hassle service, informed of process throughout. Two gentlemen that fitted were so polite and cleaned up on completion. Windows look lovely.I would not hesitate to recommend. Thank you so much

Susan Sykes

Very professional company, treated so well

Very professional company, treated so well , by all members of staff and the job itself is outstanding, completed to a very high standard, clean and tidy no complaints here

Adrian White

New door just installed

We have just had a new front door installed by Ace Double Glazing and we are totally thrilled with the quality and installation the company have supplied. The whole procedure of choosing the door to being fitted was straight forward and the company kept us informed at all times.

Michael Alderton