I am doing the roof of my garage with corrugated plastic, and I will need to cut into it to make it fit some rounded areas. How on earth do you do that though? This stuff seems to be uncontrollable. Any experience, anyone? Thanks. After looking around, I learned — Be careful not to use snips as the material will crack around the cuts and could shatter. Use either a fine bladed hand saw which will take time to cut. Do not push the saw as this could cause the cracking again. Let the saw do the work with just a gentle pressure. The blade should be thin similar to a junior hacksaw. You can use a power jig saw but the same rules apply. Little pressure and let the saw move forward slowly. With the power saw be sure to have the material held down around the cutting area. Alternatively by the flat plastic twin wall material and this is a little easier to work with and will last for far longer as the corrugated material becomes brittle after a relatively short time. I have done perhaps 50 garage and car port roofs over my working life.
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