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Measure Your Window

Important Note

These instructions are for general guidance only and you should satisfy yourself that they will apply to your situation.

***Please Read***

Within a very short period you will receive your invoice, this also doubles as confirmation of your order.

When placing your order/quote we highly recommend that you use the formulas laid out on this web page. Failure to use these formulae can lead to mis-interpretation of your requirements and we will not be responsible for any problems that may arise as a result of not following our guidelines.

Please do not include attachments with your email. All we require is your width and height sizes, styles and quantities. Please just write these in the body of your email.


We recommend you allow 10mm clearance to allow for out of square reveals for ease of installation, manufacturing and measuring tolerences. You may wish to allow less than 10mm but this may mean you will require a plane or sharp chisel. If in any doubt please ask, we are here to help.

If your windows are less than 800mm from the internal floor or within 300mm of a door you will need toughened or laminated safety glass at extra cost, this is to comply with Building Regulations and is vitally important, if in doubt please ask, as we are here to help you.

We offer full and unlimited telephone support starting with the measuring procedure and including help during the actual installation.
During the measuring process we can offer assistance usually aided with digital images and/or sketches provided by yourself.

Measurement PDFs

Click on the links below to access the diagrams and instructions

How do I get a Quotation for Secondary Glazing?

In order to obtain a quotation for secondary glazing you need to email us with - widths x heights x style AND POST CODE (e.g. two panel vertical slider, three panel horizontal slider, hinged unit etc) as per the measuring instructions

You would be well advised to have a good look at the secondary glazing options available and which of those suits your requirements for the final operation of the products.

If you require assistance call 01325 310520. or email info@secondaryglazing.com. Please Note: Quotations are only available via e-mail, however you can have as much technical advice via telephone from our technical department, who are always happy to help

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