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Tag Archives: install a dormer vent

How to install a dormer vent

How to install a dormer vent on a comp shingle roof Step 1 Drive a large nail from your attic to mark the location of your dormer vent. Step 2 Mark your roof using the dormer vent and nail as a guide Cut out the shingles with a roofing knife using your marks as a guide. See step 5 (Leave space for water flow) Step 3 Cut out the sheathing using a power saw. (Avoid cutting the shingles as this will dull the blade instantly.) …

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