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Before measuring for a Full Screen, you first need to understand how you want to mount it to your window. The different mounting techniques will effect the measurements that you take.
There are basically 4 recommended ways to mount your Full Screens to the window:
What are Full Screen Tracks?
First, check for a TOP TRACK at the top of the window. The TRACK will be a U-shaped channel that the screen will slide up into.

Next, look along the sides of the window for a flat area that creates a continuous TRACK up one side, across the top, down the other side and falls behind the LIP at the bottom, as shown below.

Next, find the LIP at the bottom of the window. This lip will be directly below the top TRACK. The bottom of the screen will fit behind this lip to hold it in place.

The aluminum window shown in the picture above has an inside lip and outside lip (inside for insect screen; outside for solar screen). If yours is similar to the picture sure and find the one on the outside, the "outside lip".
If your window does not have these "tracks" then please go to Measuring for full Screens without Tracks.
If your window does have these "tracks" and you're ready to begin measuring your windows, read:
Hey Jason,
I have my screens and they are great! Fit was perfect and they are made better than the builders screens.
Thanks for a good job and I have already recommended your company to neighbors.
Dave
Tega Cay, SC
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