Installing Roof Vents On Existing Roof

Locate the drill bit.

Installing roof vents on existing roof.

The lower half of the flange sits on top of the shingles. Drive nails up through the sheathing and shingles to mark roof air vent locations. An aluminum ridge vent has a mushroom shaped profile combined with a wide flange on both sides that sits on top of the roof shingles. Next position your ladder against your home and climb up to your roof.

How to add a roof ridge vent to an existing roof. Apply a bead of asphalt roof cement on the bottom of the vent. How to install roof vents. Center the vents on the peak of your roof so the sides of the vent lay flat on the roof.

Larger than the vent opening. Nail the lower corners with roofing nails and tar the heads. 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. Rather than being installed on the roof gable vents are installed on the exterior side wall of the home near the roof ridge.

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. First off i m not a professional roofer this is for the diy jack of all trades guys and gals out there. Make the cutout area 1 2 in. This will involve determining the placement of the vents.

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. Slide the vent under the shingles so they cover the top half of the vent flange. Cut shingles with a utility knife. 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. Hold the vent piece in place until you can nail it down. Cut the shingles for roof vents. Use enough vent pieces to fill the length of the slot you cut.

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. First head up to your attic and determine where you want to install your roof vent. Installation first requires a wood frame made of 2x4s installed from the attic between two studs. Prepare the roof area.

From the roof s peak. Center nails between rafters 18 in.