Best Method For Cutting Hole

Old 10-17-08, 03:38 PM
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Join Date: Aug 2006
Location: Baltimore
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Best Method For Cutting Hole

I am installing a new 6" kitchen exhaust duct and boot. The roof has plywood sheathing and one layer of asphalt shingles.
What is the best method or tool to make this cut? I plan on marking the center of the hole on the sheathing, in the middle of the rafter bay and drilling a pilot hole to the exterior.
Is there a smarter way to position the cut, so the boot will fit easily and make the install faster and easier?
Old 10-18-08, 04:40 AM
Join Date: Feb 2006
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Your method of locating the hole is good.
Go up on the roof and mark the circumference of the hole. Cut the shingles and felt with a utility knife. Then cut the sheathing with a jig saw. Or, if you do not mind sacrificing a blade, cut shingles, felt, and sheathing all at once with the jig saw. Good luck with your project.

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