How To Measure Your Windows For Replacement
When replacing your windows, it is very important to get accurate measurements of the opening so that
the new windows will fit in the existing hole (unless you are wanting to do a considerable amount of
renovation work to make the hole bigger). Windows are a large investment, and are usually made to
order, so if you aren’t confident that you can get the measurements accurately, it is far better to have a
professional measure your opening.
Let’s assume you are confident that you can get the job done right. There are several ways to measure
windows – from the inside, the outside, the rough opening, etc. We are going to assume that you are
replacing windows that already exist in the home. In that case, we will give you two options for
measurements. The first is from the inside, the second from the outside. Ideally, we would like to
receive both measurements unless we will be doing the installation.
When measuring from the inside, use a tape measure to determine
the width of the window from the INSIDE of the window sill.
Measure the opening at the top, the middle, and the bottom, and
write down the SMALLEST measurement you get. Remember, if
your window is too large, it won’t fit in the opening. Do the same
with the height, measuring the middle and along each side, and
write down the smallest number.
When measuring from the outside, you will want to measure the dimensions from the OUTSIDE of the
brick moulding. That is the trim that goes around the outside of the window. Again, measure in three
places, and provide the smallest number. You will also need to provide us with the jamb width.
Windows come standard at 4 ½” to 6 ½” depending the wall thickness. This is standard because the wall
frame is usually either 2x4s or 2x6s. Then add the drywall which is ½” and the sheathing on the exterior
is ½”. If you have an older home, or if you have done renovations on the wall, this number might be
different. Simply measure the distance from the outside sheathing to the inside of the drywall in the
window opening. This can be a bit tricky if the window is still in place, so don’t be afraid to call for help
in determining this number.
As stated earlier, if you are uncertain at all about getting an accurate measurement, please give us a call.
We would be happy to have someone come to your home and do the measurements for you.
Other information you will need to determine is whether you want double or triple pane windows,
glazed windows, or tempered windows. Those things can be discussed with our window experts if you
are uncertain. You will also need to know what kind of opening you would like. The diagram below will
help you understand the different classifications.
That’s it! Fill out the attached form and email it to us, and we will be in touch with you as soon as
possible to discuss your new windows!
