Unless it’s a very small window, you’ll need a metal tape measure for this, and it’s always wise to MEASURE TWICE. Mistakes are expensive! If you live in an old character house, measure the window at several points as sometimes old windows aren’t square – then work with the longest measurements.
You need the width and the height (often called the Drop). Keep note of the measurements in a safe place.
If you need more advice visit: www.advance-enterprises.com
