01954 488088    |    giles@gvharrisonbuilding.co.uk


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As members of the VELUX Certified Installer Partnership, we give our customers peace of mind - our workmanship has been rigorously assessed by VELUX through on-site inspections, our trading history has been checked and references from previous customers have been collected.


VELUX are also a Trustmark scheme operator, giving you additional comfort in knowing that we are members of the only government-endorsed scheme for tradesmen.


VELUX CABRIO Balcony installed in Impington, Cambridge

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From 1st August 2018, for every replacement VELUX window we install, we will donate £10 to our chosen charity,


So far we've donated £1380!


Our chosen charity for 2020 is Myositis UK.

We've been working with VELUX products since our beginning but officially became a VELUX Certified Installer in 2015.

In recent years we've installed over 250 VELUX products including;


  • Manually operated roof windows (both new & replacement)

  • INTEGRA roof windows

  • CABRIO balconies

  • Flat roof windows

  • Blinds

  • Shutters

  • Sun tunnels

  • Smart ventilation systems

  • Smoke ventilation systems


We also install solar upgrades and carry out repairs and services to existing VELUX windows.

We think that VELUX products are the best of their kind on the market and we are proud to be Certified Installers.  We work with them to ensure that we can be the very best installers of their products.  Find us on the VELUX website or on the TRUSTMARK website.

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With the majority of VELUX installations we provide a 10 year Workmanship Guarantee, an Insurance Backed Guarantee (IBG)* and a Building Control certificate**, so you can feel safe in the knowledge that our work will be of the highest standard.


*IBG provided by QANW

**BC certificate provided by Certass