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Internorm Windows

John Knight Glass is pleased to present our partner Internorm, the leading European brand, bringing you their distinctive collection of windows and doors. Combining elegant architectural design with high tech engineering and quality, together we can create a beautiful, energy efficient home of your dreams.

Internorm appreciates John Knight Glass is the ideal showcase for the largest selection of their products in the North West of England. Here our clients from Merseyside, Greater Manchester, Cheshire and further afield all find the journey well worthwhile. Our Internorm display section includes the latest Lift-And-Slide HS 330 door, featuring geometric edges and a continuous slim line frame - built to allow maximum light entry and create a spacious, bright and contemporary feel.

Internorm frames are available in a choice of timber/aluminium, UPVC/aluminium or UPVC with a selection of finishes and colours. All products come in a choice of signature design styles: 


Studio,  contemporary, minimalist feel to reflect clean architectural designs.

A contemporary, minimalist feel to reflect clean architectural designs.


Home pure, sleek, bright and modern style.

A sleek, bright and modern style.



Home soft, warm and welcoming, radiating comfort.

Warm and welcoming, radiating comfort.


Ambient, classic design to complement traditional architecture.

A classic design to complement traditional architecture.


Additional features available include the I-tec Ventilation system with integrated energy saving heat exchanger, optional pollen filter for clean fresh air and the I-tec Locking system cleverly concealed within the sleek profile so that no locking parts are seen on the outside of the frame.

Having very low heat conductivity, argon and krypton are key components used between the triple layers, acting to increase the thermal insulation property, or U value of these windows.

If your house is near to sources of sound pollution, such as road or air traffic, you will find the noise reduction properties offered invaluable.

Internorm also provides CPD training for architects.