- 1). Move attic insulation out of the way of the location for the dryer vent. Choose a location at least 2 feet from chimneys, vent pipes or anything else going through the roof.
- 2). Mark the location for the dryer vent inside the attic on the ceiling. Draw a circle with chalk the same size as the dryer vent pipe on the ceiling. Measure the width and divide by half to find the center.
- 3). Hammer a nail from inside to outside at the center of the dryer vent pipe. Leave the nail in position and go out to the roof.
- 4). Make a mark half the width of the pipe from the nail sticking up through the roof. Measure the same distance down and on each side. Mark in the same distance in between each of those marks and connect the marks to create a circle. Remove the nail by pushing it back down through the hole.
- 5). Use the reciprocal saw to cut along the line through the shingles and roofing materials.
- 6). Place the clothes dryer vent in position on the roof with the tube through the hole in the roof.
- 7). Mark the location of the edges of the flashing attached to the roof dryer vent on the shingles with chalk. Remove the roof dryer vent.
- 8). Gently lift the shingles to the left, right and top of the marking to see if there are any roofing nails under the shingles where the dryer vent flashing will be positioned. The dryer vent will rest on top of the shingles below the vent flashing, so only the shingles on the top and each side will need to be checked.
- 9). Remove roofing nails from the shingles under the chalk outline with a flat pry bar.
- 10
Measure the distance from the edge of the flashing on the dryer vent to the raised portion of the vent on each side and the top. Mark these measurements on the shingles to correspond with the existing chalk outline of the flashing. Trim the roof shingles on the inside line with a utility knife. - 11
Slide the flat flashing section of the dryer vent under the shingles at the top and sides of the roof dryer vent. The trimmed shingles should be gently against the raised vent section. If there is any buckling or the shingles are too tight against the vent, trim the shingles a little more. - 12
Lift the shingles the flashing is under and nail the dryer roof vent in place. Place a couple more nails in the flashing section along the front edge and corners of the dryer roof vent. - 13
Squeeze caulk on all nail heads to prevent leaking. - 14
Brush roof cement or tar around the vent where it meets the trimmed shingles to prevent water from getting under the shingles during heavy rains. - 15
Attach the inside section of the dryer roof vent by aligning it with the exterior portion of the vent and using short screws to attach it to the inside of the roof.
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