Template marked out on the roof. Mine was 31" Wide by 38" Long as it was the Mega roof. I ended up starting out with the template but due to it being paper was a pain to stick to the roof. I made the measurements at the front using the template and got close to the back but used a piece of flexible plastic to make the lines. A tip for anyone fitting this roof is that the front corners are 7" from the gutters and 8" from the rear (This is due to the profile of the roof). With these markings the lengths and widths should be correct. Always double check, I checked and double checked as I only wanted to make one cut. Measure along all four sides and also corner to corner as well.
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