CERTASS Certification a homeowners guide

CERTASS is a scheme that the Department for Communities and Local Government has approved for the last 15 years. The purpose of CERTASS certification for homeowners is to ensure that double-glazing installation firms comply with the relevant building regulations. Upon completion of the installation, we provide you with a Certass certificate that you must keep. This CERTASS certification is also essential should you come to sell your home.

In order to get approved as a CERTASS member, C&A Window Systems Ltd is suitably vetted and approved. Our processes, business standing and other factors ensure we only carry out the best service.

Why we choose CERTASS certification

image of a lady in front of  patio doors, advice article on CERTASS certification

One of the most important trust factors for you as a customer of C&A Window Systems is the provision of an insurance-backed guarantee for our work. This guarantee is there to support our own manufacturing and installation warranty.

CERTASS certification ensures your installation is compliant with the required Building Regulations without the installation being inspected by your local Building Control Officer. You save time, money and hassle as a result.


CERTASS certification ensures there are no complications or surprises should you come to sell your home in the future. Conveyancing requires this certification. Do bear in mind only replacement windows or windows in new openings are covered. CERTASS certification is not required for repairs, adjustments or modifications to existing windows.

CERTASS vs FENSA – what’s the difference?

The other option for compliance is the FENSA route. CERTASS certification and the FENSA route both provide compliance. You may be more familiar with FENSA owing to heavier marketing carried out by the Glass and Glazing Federation and other fenestration bodies. FENSA came first but rest assured, they are two very similar ways of ensuring your window and door installation meets the required standards and conformance.

Your project needs to be certified by either FENSA or CERTASSS. This is the most important thing you need to be aware of before putting your home up for sale. We have chosen the CERTASS certification route.

Peace of mind installation for you

We are happy to discuss the details of CERTASS certification with you, so do get in touch if you have any questions or require more information. C & A Window Systems Ltd are a CERTASS-certified business. We make our own windows and doors and use our own highly-trained installers. You’re assured of expertly-crafted windows and doors, the right installation, a quality guarantee and your new glazing meeting current Building Regulations.

Customise Your products

A personalised touch

Glass options

Contemporary designs that enhance security and privacy.

Integral Blinds

An attractive addition delivering privacy and shading when you need it.


Peace of mind starts when you get in touch and lasts for years.

steve arundellsteve arundell
13:43 02 Nov 23
Chris and Andy listen to what we wanted and their team then delivered in spades.Great company well worth the effort to contact.
ArBa InstallationsArBa Installations
22:23 20 Dec 22
Posting from the view of an Installations company, C & A have always been a pleasure to deal with. Their process is very thorough and products are top quality. We use them for all our commercial doors and would highly recommend all their products and them as a company.
Paul DillonPaul Dillon
14:17 23 Nov 22
Great service. Top products. Thank you. C&A
Alfie TonerAlfie Toner
13:43 21 Nov 22
Great company to deal withQuick quotesPleasant staffGreat productsGreat customer supportDefinitely recommend
22:50 12 Jun 22
Couldn’t recommend this amazing company enough from start to finish the professionalism have been second to none. The quality of the work undertaken shows how much C&A take pride in there work. Thank You again
Gary WoodhatchGary Woodhatch
11:11 11 Mar 22
Have been dealing with Andy and Kim in the main at C&A windows for a few months now and the service overall has been great, quick quotes, lead-times inline with expectations and well presented and packaged goods. Great responsive aftersales assistance when called upon. Would recommend C&A for sure.
richard newellrichard newell
07:44 11 Mar 22
Always a pleasure to work with the people at c and a, very good communication throughout the process and most importantly the product is excellent.Highly recommended.

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01787 477976

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8am – 5pm Monday – Friday

Unit 1, Lancaster Way
Earls Colne Business Park, Earls Colne, Colchester CO6 2NS

We are looking for new staff to join our team.