Drill a hole upward through the middle of the area you desire and leave the drill bit sticking up through the roof so you can find it from the outside.
How to install a roof vent cap.
Slide the vent under the shingles so they cover the top half of the vent flange.
For most asphalt shingle ridge caps there are two.
Go into your attic.
Cut the ventilation opening.
Press the cap into the foam and drive in self sealing screws along the edge of the roof cap.
Check around the edges of your attic for any wiring.
Next position your ladder against your home and climb up to your roof.
Start at one edge of the roof and lay the cap on the ridge line.
The lower half of the flange sits on top of the shingles.
Start by removing the nails holding the ridge cap shingles in place.
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Use foam insulation along the edge of the roof cap where it meets the metal roofing material.
Install new field shingles.
Apply a bead of asphalt roof cement on the bottom of the vent.
Remove the shingle caps.
This is an area of the roof which requires extra care and skill.
First head up to your attic and determine where you want to install your roof vent.
Install the ridge vent shingle over style install the ridge vent aluminum.
This video is a comprehensive rundown on how to install a roof vent on a pre existing shingle roof.
Installing soffit intake vents.
Adding static exhaust vents.
Plenty more videos t.
If you have any questions or comments at all please comme.
Locate the drill bit.
Choosing a whole house fan.
Drive a nail through your attic to mark where you want your vent.
Remove the paper backing and stick it to the metal roof.