Installing Roof Vents On Existing Roof

Rather than being installed on the roof gable vents are installed on the exterior side wall of the home near the roof ridge.

Installing roof vents on existing roof.

First off i m not a professional roofer this is for the diy jack of all trades guys and gals out there. The lower half of the flange sits on top of the shingles. From the roof s peak. Choosing a whole house fan.

Slide the vent under the shingles so they cover the top half of the vent flange. Various size vents will come with recommendations regarding spacing and placement based on the size of the vents and the expanse of the roof. Use a marker or a chalk line to mark the spot on the roof surface where the vent will be placed. Mark attic roof air vent locations.

The amount of venting your attic needs is based on its floor space and to ensure proper air circulation the venting should be equally divided. How to install roof vents. Drive nails up through the sheathing and shingles to mark roof air vent locations. Center nails between rafters 18 in.

Center the vents on the peak of your roof so the sides of the vent lay flat on the roof. If you need to cut the vent to fit at the end of your roof use a utility knife to make it flush with your home. Cut the shingles for roof vents. This video details how to install roof vents in a r.

Make the cutout area 1 2 in. 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. Cut shingles with a utility knife. How to add a roof ridge vent to an existing roof.

Apply a bead of asphalt roof cement on the bottom of the vent. Larger than the vent opening. Nail the lower corners with roofing nails and tar the heads. Prepare the roof area.

Locate the drill bit. Use enough vent pieces to fill the length of the slot you cut. Next position your ladder against your home and climb up to your roof. A shingle over vent is installed over the ridge of a roof and is covered over by asphalt shingle caps that match the surrounding roof shingles.

Installation first requires a wood frame made of 2x4s installed from the attic between two studs. Hold the vent piece in place until you can nail it down.