Secondary Glazing

Secondary glazing design specialists in the Thame area

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Key Features

Slim, discreet, unobtrusive frames

Balanced tilt back facility as an option on vertical sliding secondary systems as standard

Increases thermal and acoustic properties of existing windows

White and Brown as standard. Full RAL colours available

Horizontal sliding units run on hard-wearing nylon skids or heavy-duty rollers

Fully customisable glazing from standard to high security and acoustic options

Secondary Glazing involves adding another slim-line window in addition to your existing windows. It is a cost effective and efficient method of insulating & sound proofing your windows. By fitting our Secondary Glazing you could save around 10% on your heating bills. The Energy Saving Trust states that it is an ‘ideal solution if you are unable to replace your existing windows with double glazing’.

Secondary glazing is perfect for use in Listed Buildings and conservation areas. Made from strong lightweight aluminium, it can be made to be very slim and discreet. Considered a reversible change, secondary glazing is recommended by English Heritage and the Listed Property Owners Club.

A range of designs

Having a 100mm air gap between the secondary glazing and the existing windows (glass to glass) will provide an optimum gap for sound and heat performance. The air gap provides an additional barrier, preventing heat and sound from passing through. We have deeper sub frames for the purpose of ‘reveal’ fixing the secondary glazing to give this gap. If only a smaller gap can be used then secondary glazing is still very effective as the performance difference between say a 70mm gap and 100mm gap is only small.

With the options of white, brown and silver anodised as standard finishes, we can also powder coat the aluminium frames to any RAL colour you may want.

Secondary glazing comes in four designs allowing for us to match the existing window design where necessary and to allow for easy access to the existing window for opening and cleaning:

1. Vertical sliding

2. Horizontal Sliding

3. Lift Out

4. Hinged (Butt or friction)

Brochure: Secondary Glazing

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Explore our gallery

With the options of white, brown, and silver anodised as standard finishes, we can also powder coat the aluminium frames to any RAL colour you may want. Explore our gallery below and find some inspiration for your glazing design.

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A range of designs

As a family run business, Windmill Windows take customer service to the next level. We work personally with you to make sure you are happy every step of the way. See what our customers said below.

“We were very impressed with the quick, efficient and tidy work of installing our secondary glazing by your installers who were very friendly and a pleasure to have in our home. We are looking forward to using your company again for the replacement of our double-glazed unit once we have listed building consent in place."

Chalgrove