Hi we are in the process of a remodel. I want a solar cover. At the longest points my pool is 30x15. Is it best to buy oval and cut to shape or rectangle and cut to shape based on the picture below. Thanks for any replies.
Rectangles are usually easier to trim.
I suspect you will find a 15x30 too narrow. Find the widest point that is 90 degrees from the line making the longest length.