Double Glazing

Triple Glazing

Laminated Glass

Tinting & design application





The energy efficiency of a window or door is measured in U values. With the increasing awareness of the cost of energy and the drive to improve a buildings efficiency there is a drive towards increasing U values.  Building regulations will also require any extensions to meet with a U Value.


The cavity between the glass is filled with gas to improve its efficiency.


We can offer assistance on the energy rating of the different types of glass ... whether you are interested in double or triple glazing.


Obviously there is an increase in the cost when triple glazing is used - we can provide you with help to ensure you reach the correct decision for your project.








Contact details

Tel: 01246 555255


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contact form.

Opening times

Monday-Friday 8:00 / 16:30

Saturday: By appointment



Come and visit our instore showroom - coming soon !


Feel Free to ask about our Bi-Fold doors!

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CMC Aluminium Systems Ltd

Unit 2 Harvest Works

17 Callywhite Lane



S18 2XR


Tel: 01246 555255

Company Registration Number : 2911045

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© CMC Aluminium Systems Limited, Unit 2 Harvest Works, Callywhite Lane, Dronfield S18 2XR 01246 555255