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VELUX Certified Installers 

HessianCole are proud to be fully accredited members of the VELUX Certified Installer scheme. We have been members since 2008 and consider the scheme as a way of providing our potential customers with additional trust in the service we offer.  We are VELUX fitters based in Bicester and we install, replace and repair VELUX windows, sun tunnels and blinds throughout Oxfordshire and the surrounding counties of Buckinghamshire, Northamptonshire, Gloucestershire, Wiltshire, Bedfordshire, Warwickshire and Berkshire.

HessianCole - VELUX Certified Installers
Why choose a VELUX Certified Installer

VELUX are a Trustmark scheme operator, so you have the additional comfort and peace of mind that Certified Installers are members of the only government-endorsed scheme for tradesmen.

VELUX Certified Installers must comply with stringent and regular checks and assessments by independent industry experts including:

  • Examination of their financial records and trading history

  • Provision of relevant documents such as public liability insurance

  • Credit checks

  • References from previous customers

Certified Installers also undergo on-site inspections to ensure that the quality of their work meets the VELUX standard and agree to a comprehensive code of practice covering conduct and workmanship.


As well as these benefits, using a VELUX Certified Installer gives you peace of mind as VELUX can act as an intermediary should any disputes arise between you and your installer. 

What is TrustMark
Government Endorsed Quality
Robust consumer protection


By choosing a TrustMark organisation you know that via the Scheme Provider mechanism (working to the Framework Operating Requirements and backed up by the Code of Conduct) – you are getting the most robust level of consumer protection available.

When you see the TrustMark logo you know that whether you are hiring an electrician or a tree surgeon, you are engaging with an organisation that meets the required levels of competence, has had their work regularly inspected to ensure consistent quality, and has made a positive commitment to good customer services and trading practices.

TrustMark is the only scheme that includes an integrated Trading Standards disputes process which offers a controlled and reasonable sanctions process if appropriate.

TrustMark requires that all Registered Businesses provide two-year guarantees and protection for works over £500.  You can also protect your investment for as little as £6 through TrustMark's escrow service.  HessianCole provide a 10 year guarantee on all VELUX replacement and new installations.

Previous customers of TrustMark Registered Businesses are able to leave reviews on the TrustMark website

These reviews are all verified to ensure each review is genuine and businesses are able to respond to reviews.

HessianCole - Trustmark

There are many websites stating they have or are Certified, Registered or Approved installers of VELUX windows.

If they do not display the VELUX Certified Installer logo and you cannot find them on the VELUX find an installer page they are not registered, approved or certified.  You can check our membership via the links below.

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