Measuring for new windows is not always easy. But you do need to get your measurements exactly right to avoid installation issues and improvised quick fixes when your window doesn’t properly fit.
We have provided some guidelines on how to measure the existing windows in your home when preparing to install new windows. If you feel that you are not up for the job, get a professional to help you.
- Use metric not imperial
The first rule of thumb is to make sure you take accurate measurements in millimeters not inches. This gives you a finer level of accuracy and means there’s no room for error from the window manufacturer when they convert your measurements to metric.
- Measure the opening outside
First step outside and take height and width measurements for the exterior opening. Bear in mind that the height measurements must be from underneath any existing removable windowsill and measure to the exterior edge.
- Measure in at least three different places
Remember the opening may not be exactly square so take a minimum of three measurements – top, middle and bottom, for the height and the same again for the width. This means your window manufacturer can get an accurate view of the exact size of the space the finished product will be fitted into. The final width and height measurement the manufacturer will use is the smallest one.
- Deduct 10mm
It’s a good idea to take off 10mm from the final height and width measurements. This will allow for small fitting allowances around the new frame and means the installer can make sure the new window frame sits squarely when it’s in place. Any gaps are then fitted with spacers and filled to keep the frame in just the right position.
- Never measure the old frame
This is a common error and should be avoided. Ignore the old window frame because it may have warped, so the last thing you want to do is take measurements from it!
- Be sure of your measurements
Make sure you check (and double-check) your measurements so you are 100% sure you have them correctly. This is important because no window manufacturer will accept responsibility for incorrect measurements, and you will still have to pay for a window that doesn’t fit. If you are unsure, consult a professional installer and give yourself total peace of mind. It’ll be worth it.
- Get Quotes
Complete our simple online form and you’ll be contacted by a Broadview Windows professional installer, who will each provide a free quote for ou.