Apply a bead of asphalt roof cement on the bottom of the vent.
Installing roof ventilation fan.
To install an attic fan over a gable vent in your attic trace the body of the fan onto a piece of plywood that s wide enough to mount on the studs on each side of the vent.
Roofers charge between 45 and 75 per hour.
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Choosing a whole house fan.
Then cut out the circle with a reciprocating saw and mount the fan over the cutout using a drill.
Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them.
You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications.
Roofers are the most qualified to install attic fans mounted 1 on your roof line.
To save time use an existing roof or gable vent to install your new attic fan.
You install an attic fan through the roof and flashed under the shingles.
But before you cut any holes plan the locations of the attic vents.
However if you are mounting 1 the vent or fan on your roof or if you are installing an electric or solar powered fan you will need to hire a professional installer to do the job.
The lower half of the flange sits on top of the shingles.
Slide the vent under the shingles so they cover the top half of the vent flange.
Nail the lower corners with roofing nails and tar the heads.
Adding attic vents is a simple matter of cutting holes and installing vents.