Installing Roof Vents On Existing Roof

Center nails between rafters 18 in.

Installing roof vents on existing roof.

Cut the shingles for roof vents. Cut shingles with a utility knife. Hold the vent piece in place until you can nail it down. First off i m not a professional roofer this is for the diy jack of all trades guys and gals out there.

Apply a bead of asphalt roof cement on the bottom of the vent. This will involve determining the placement of the vents. Prepare the roof area. Rather than being installed on the roof gable vents are installed on the exterior side wall of the home near the roof ridge.

Various size vents will come with recommendations regarding spacing and placement based on the size of the vents and the expanse of the roof. Next position your ladder against your home and climb up to your 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. Installation first requires a wood frame made of 2x4s installed from the attic between two studs.

Make the cutout area 1 2 in. Center the vents on the peak of your roof so the sides of the vent lay flat on the roof. From the roof s peak. 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.

Locate the drill bit. Mark attic roof air vent locations. Larger than the vent opening. How to add a roof ridge vent to an existing roof.

First head up to your attic and determine where you want to install your roof vent. 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. Slide the vent under the shingles so they cover the top half of the vent flange.

Choosing a whole house fan. 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. Drive nails up through the sheathing and shingles to mark roof air vent locations. The lower half of the flange sits on top of the shingles.

This video details how to install roof vents in a r. 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.