FENSA – the government authorised scheme for homeowners looking to replace windows and doors.

FENSA works with thousands of double glazing contractors in England and Wales. In choosing a FENSA double glazing registered company the consumer is offered greater protection when purchasing double glazing for their home.
For peace of mind, homeowners can use a FENSA registered business for your double glazing installations:

1. Keep your FENSA certificate safe – you can’t sell your home without it.
2. Avoid rogue traders – use a FENSA installer
3. 92% of windows and doors are covered by FENSA in the UK .
4. More than 10 years of raising standards in the glazing industry.
5. FENSA is the original Competent Persons Scheme.
6. FENSA – the quick and simple route to building regulations compliance
FENSA has issued over 9 million window and door homeowner certificates and is the recognised double glazing industry leader.



Trustmark Accredited Trustmark Small Logo
TrustMark is the Government backed initiative to help consumers find reliable and trustworthy local tradesmen to carry out repairs, inside and outside the home.
It is widely supported by consumer protection organisations, local Trading Standards and the building industry.
TrustMark is a not-for-profit company



  • Every firm’s technical skills have been independently checked through on-site inspections.
  • Firms work to Government Endorsed Standards.
  • Quality of work, trading practices and customer satisfaction monitored.
  • Checks on trading records and firms’ financial status.
  • Firms are able to offer an insurance backed warranty.
  • Clear and user friendly complaints procedure should you need it.



“ TrustMark is an easy way for consumers to identify a builder who has agreed to abide by industry standards of competence and fair trading.”Consumer Minister, Parliamentary Under-Secretary of State for Business

“ TrustMark is an excellent example of the kind of creative problem prevention initiatives that we really value.”Chief Executive, Citizens AdviceGillian Guy

“ TrustMark helps grow consumer confidence by monitoring firms to ensure they perform to an agreed code of practice.”Chief Executive, Trading Standards InstituteRon Gainsford

“ I found it so easy to find a local TrustMark inspected tradesman to help me with my damaged roof. I now only use TrustMark firms to help me do any work around my home.”Mrs Claire QuinnTaunton


Planitherm Installer Maidstone Kent


Clearly the most energy efficient window glass PLANITHERM is Europe’s best selling range of high performance low-emissivity glass (low-E), incorporating the very latest advancements in thermally insulating glass coating technology. In the UK, PLANITHERM TOTAL+ is rapidly becoming recognised as the low-E glass of choice when it comes to achieving the best possible Window Energy Ratings.
PLANITHERM products are specifically designed to keep interiors more comfortable in the winter months and improve the home’s energy efficiency. With their transparent metallic coating they are able to reflect heat from radiators or fires back into the room, rather than allowing it to escape through the windows. At the same time, the coating allows free heat and light from the sun to pass through the glass, warming the room and further contributing to the efficiency of the windows.
Double glazing incorporating PLANITHERM TOTAL+ insulates three times more than single glazed units and at least 25% better than most currently installed double glazing. PLANITHERM products are the ideal low-E glass solution to meeting and exceeding the energy efficiency requirements of newly revised Building Regulations.

How it works

Clearly the most energy efficient window glass Developed specifically for the particular needs of the UK market, PLANITHERM TOTAL+ has been optimised for Window Energy Ratings (WERs). It combines excellent thermal insulation with high passive solar energy gain, making it the most energy efficient window glass available.
PLANITHERM TOTAL+ is a revolutionary high performance thermal insulating glass. Manufactured in the UK by Saint-Gobain Glass, PLANITHERM TOTAL+ incorporates the very latest advancements in glass coating technology. A combination of microscopically thin transparent metal oxide layers are applied under vacuum conditions to high quality clear float glass in the UK’s only magnetron coater.

The coated glass is later cut to size and incorporated into an insulating glass unit, usually forming the inner pane of the IGU which in turn is glazed into the window frame. Once installed, the high performance coating within the IGU reflects heat from radiators or fires back into the room, rather than allowing it to escape through the windows. At the same time this coating allows free energy and light from the sun to pass through the glass, warming the room. The combined effect contributes significantly to the energy efficiency of the windows, meaning that it takes less energy to maintain a warm, comfortable home.

PLANITHERM TOTAL+ boasts excellent thermal insulation. The high performance coating will achieve an optimum centre pane U-value of 1.2W/m2K (measurement of heat loss), easily outperforming the requirements of new Building Regulations and helping to achieve the best possible energy efficiency all round.


TGO 001



The nation’s leading supplier of PVC-U building products