Thermaframe is a well established home improvement company based in Kent

We employ our own full-time consultants, surveyors, fabricators and installers who are all thoroughly trained experts in their field. We have a huge range of products on display at the Polhill Garden Centre. Feel free to wander around our site and see if you like what we have built. It may well give you ideas and inspiration for your own home improvement dreams.

Why Choose Thermaframe?

There are thousands of conservatory, window and door companies in the UK. The Thermaframe name has been associated with the Polhill Garden Centre in Sevenoaks, Kent since the 1980's. We have many repeat customers and always try our best to satisfy our customers’ needs. Thermaframe is now a wholly owned subsidiary of the Whiteline Group, the largest manufacturer of windows and doors in the South East of England. Whiteline have been trading for over 25 years and are known for their high quality products and excellent service. Whiteline cares a great deal about its staff and its reputation in the market-place and is well known in the industry for being a caring company. Based in Eastbourne, it is one of the largest private employers in the town and some of its employees have been with the company from the beginning; over 25 years ago. If you would like to visit the factory and see how much time and effort we put into making our products, please ask the Thermaframe staff to arrange a visit for you.

We offer

• Award winning installations
• 10 year guarantee, with optional additional cover from the IWA
• Free consultation, site survey and design
• Impartial friendly expert advice
• Specialist teams of window and door installers
• Expert conservatory designers
• No obligation quotations and no hard sell
• 'A' rated energy efficient energy saving window systems
• Members of the Energy Saving Trust, Fensa & the IWA
• Supplier of Pilkington EnergiKare™ including Pilkington Activ™