Windows & Doors

Part of Nexus BS

Contact Us: 01926 886611



Nexus offer Certass on all installations


We are members of Certass which is a Competent Person Scheme that covers the installation of replacement windows and doors. This means that we self-certify our work to all current UK building regulations and Certass registers the work with the relevant local authority.

The benefit to you is that our work is vetted by Certass so you can be sure of a professional and certified double glazing installation. As a member of Certass we are assessed for (among others) the following factors giving you the peace of mind that comes with using a reputable contractor:

  • Trading record and financial status
  • Estimates are provided in plain language
  • Guarantee wording is fair
  • You will be offered an insurance backed guarantee
  • Sample installations are annually inspected
  • up to 10 year guarantee
  • Window installations meet current thermal rating regulations
  • Adherence to the “7 day cooling off” legislation
  • A complaints handling procedure is in operation
  • Protection if deposit taken


The Thermal Rating Register, also managed by Certass, ensures thermal compliance of replacement windows and doors.

Certass and the Thermal Rating Register pride themselves on delivering a fair, friendly and cost effective service to both the industry and homeowners.



Competent Person Schemes were set up by the government to provide an alternative to submitting a building notice or using an approved Local Authority inspector for certain home improvements and building works.

All Certass registered contractors are vetted to ensure they are qualified to carry out installation work in accordance with the current building regulations and, once an installation is complete, Certass provides you with the Building Regulation Compliance Certificate for the work carried out.

Alternatively, notification and approval of the completed work can be sought from your Local Authority’s Building Control department directly. This can cost in excess of £250.



The Building Regulations 2010 (as amended) are a set of mandatory functional requirements established in law to protect the health, safety, welfare and convenience of building users and people who might be affected by buildings or matters connected with buildings. They also define the thermal performance of buildings and building works.

The Building Regulations are not concerned with aesthetics (what the installations looks like) or the quality of the installation so long as it does not adversely affect the thermal performance or the health, safety, welfare and convenience of building users and the general public.

Therefore poor finishing of an installation such as untidy sealant, large trims or uneven finishes although not satisfactory to a householder may well not breach the building regulations. Such issues are likely to be contractual issues that should be taken up with the installer at the time of the installation.



The Building Regulation Compliance Certificate is your proof of compliance with building regulations and will be required by your solicitor should you wish to sell your property.

If you’ve lost your Certass issued certificate, either you or your solicitor can contact Certass directly and a replacement will be issued, there is a small charge