Installing Roof Vents On Existing Roof

Mark attic roof air vent locations.

Installing roof vents on existing roof.

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. First head up to your attic and determine where you want to install your roof vent. 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.

Make the cutout area 1 2 in. Locate the drill bit. Installation first requires a wood frame made of 2x4s installed from the attic between two studs. 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.

Cut the shingles for roof vents. This video details how to install roof vents in a r. Apply a bead of asphalt roof cement on the bottom of the vent. First off i m not a professional roofer this is for the diy jack of all trades guys and gals out there.

Hold the vent piece in place until you can nail it down. Various size vents will come with recommendations regarding spacing and placement based on the size of the vents and the expanse of the roof. Rather than being installed on the roof gable vents are installed on the exterior side wall of the home near the roof ridge. Next position your ladder against your home and climb up to your roof.

Prepare the roof area. 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. 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. Center nails between rafters 18 in.

Larger than the vent opening. Center the vents on the peak of your roof so the sides of the vent lay flat on the roof. How to install roof vents. Cut shingles with a utility knife.

Choosing a whole house fan. Use enough vent pieces to fill the length of the slot you cut. Use a marker or a chalk line to mark the spot on the roof surface where the vent will be placed. This will involve determining the placement of the vents.

Drive nails up through the sheathing and shingles to mark roof air vent locations. Nail the lower corners with roofing nails and tar the heads.