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So... I know this is a thing, and I know there are several here who have done it. I need to get a 70' roof down to 65. Any tips?Thanks for the help!
Can you cut it out of the middle?
I don't have a table saw, and haven't tried shortening this kind of roof, but here is my process for splicing plastic parts:1. I don't expect my cut to be perfect, nor perfectly square. I cut it close but a little too long, then sand (NWSL Tru-Sander, for example) to exact fit.2. I like to soften the cut ends a bit with plastic solvent before pushing them together. My experience is that this helps create stronger joint than just trying to wick solvent between two close-fitting pieces.3. I reinforce the splice on the inside with some styrene.4. I use putty to smooth out the splice on the outside, unless it's hidden by a feature like a ridge or groove. Rivet strips don't hide splices very well
I had to split two parlor roofs down the middle lengthwise to get a roof without a/c ducts for a diner. I used a milling machine to do it. A jewelers saw and a miter box should be sufficient to get square cuts crosswise.
Measure twice, cut once?
Or measure twice, cut once, swear, measure again, then cut?
Don't forget to shave off the retaining bumps on the side flanges or they will no longer sanp into theire respective pockets. OF make new pockets for them to snap into, else you will be gluing that roof in.