Hot wire jig for cutting rigid foam tapers.
The end result of this process will produce two 2' x 4' foam boards that are tapered from one end to the other. The slope is 1/4" to a foot. Just what I needed for the shower pan underlayment. Less some spelling errors on the annotated pictures, the whole jig cost me less than $40.00. I'm sure that a less expensive solution could be made if you have a shop with stuff hanging around.
The end result of this process will produce two 2' x 4' foam boards that are tapered from one end to the other. The slope is 1/4" to a foot. Just what I needed for the shower pan underlayment. Less some spelling errors on the annotated pictures, the whole jig cost me less than $40.00. I'm sure that a less expensive solution could be made if you have a shop with stuff hanging around.
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Make sure when you are actually cutting the board that you have plenty of air circulation. I kept my shop open at both ends so I had a good breeze happening when I did this. Not much smoke with my setup, but don't take chances with the vapor. Cutting all the material I needed was a snap. It took longer to make the jig than cut the foam.
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-Bruce