Denis Windows Services

Denis Windows are fully equipped with the most up to date technology including full CAD drawing facilities. We enjoy working closely with contractors and end clients in order to ensure that all products installed are specified correctly.

If you have a project underway we would be pleased to provide an estimate. We would offer any help and/or advice you may require.

Denis Windows products

Denis Windows products


Our expertly-trained installers will carry out the work with the minimum of inconvenience. They will observe the latest health and safety regulations.
The only difference we'll make is the one you asked for - we won't leave you with debris, mess or half-finished work.
Every installation is inspected on completion to ensure unrivalled quality.


From the moment it is installed, your Denis Windows installation is covered by our guarantee. We undertake to replace free of charge any Denis Windows unit that develops a fault or repair where it is reasonable to do so.

We offer a comprehensive guarantee on products:

  • Aluminium Profiles 20 years
  • Aluminium powder coating 20 years
  • Aluminium Bifold door hardware 10 years
  • All Aluminium and uPVC applications hardware 1 year
  • uPVC profile 10 years
  • Glass sealed units 10 years
  • Installation 10 years


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