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Energy rated PVC and Aluminium windows, doors, bi-folds and conservatories…

Energy Window Rating from Sternfenster

As a family run company our mission is to offer a ‘fantastic range of products at reasonable prices, deal with nice people and have some fun along the way!’ We have spent many years building a stable company that is customer focused and committed to supplying a first class product with a first class service.

With a proven track record and an untarnished reputation built on forging long term relationships we are in the unique position of being one of the few local businesses with total experience and total commitment. As you can see we offer a wide range of products and would welcome the opportunity to guide you through the buying process.

Product Range

As part of our commitment to delivering the very best products we are always looking to improve our product range in line with customer demands.

Our product range has developed into one of the most comprehensive on the market and in line with the industry move to energy efficient windows all our casement and tilt and turn frames are a standard B rated window as recommended by the energy saving trust.

Not all windows are the same!

We are regularly audited by the British Standards Institute to ensure that our frames and units are manufactured to the latest quality and security Kitemark standards, giving you total peace of mind regarding our production methods and our guarantees.

High impact multi chambered windows

High impact PVC with a multi-chambered design, extruded to BS 7413:1991. This allows us to reinforce the frames in order to build in more strength, to improve the security and thermal performance.

Utilising warm edge spacer technology and specially coated glass enables us to offer a thermally efficient 28mm B rated unit.

430 grade stainless steel hinges and dual position keeps are tested to cycle runs of 25,000 giving you peace of mind for years of smooth, rust free use.

Utilising the very latest high security shootbolt locks with up to 6 locking points down the opening side, the lock is a substantial barrier against would-be attacks. Unique dual locks in the centre grip the frame and sash shut and when combined with additional claw locks the window passes the BSI security Kitemark, BS7950, giving you an effective security barrier.

Our units are proven to reduce noise transmission by up to 2dB and being 950 x less conductive than aluminium spacer bar units they also help reduce condensation.

All frames are internally beaded, meaning the glass cannot be removed from the outside which offers a higher degree of security than other available windows.

The British Standards Institute is the world’s first national standards body, focused on improving systems, applications and processes in business by benchmarking them against set standards. Since 1991 our products have been tested against these standards to ensure that you get a quality product every time.

British Standards

Secured by Design is the official UK Police flagship initiative supporting the principles of ’designing out crime’. Our windows and doors comply with the latest Secured by Design standards giving you total peace of mind, log on to for more details.

Remember to look for the Energy Saving Recommended logo when choosing your windows, that way you can be sure they are the most energy efficient, as the whole window is assessed on a rating of A-G by the British Fenestration Ratings Council, log on to for more details.

Energy Saving

Energy rated PVC and Aluminium windows, doors, bi-fold doors and conservatories.

What our clients think!

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Energy efficiency explained...


Click for a list of the CE Markings available.

"Our products are subject to continuous development and improvement. All descriptions, illustrations, drawings and specification in this publication shall not form any part of any contract and the right is reserved to change specifications without prior notice or public announcement."