DIwYatt: Venting the Range Hood Through the Roof

By | October 16, 2014

Melissa wrote about putting up the Range Hood and the vent into the attic here.

Mounting Range Hood in Kitchen 5

What was remaining on this project was to continue the vent out of the roof. We were using a long extension piece of 6-inch pipe to get out to the roof that we found at Home Depot.

Venting Range Hood to Roof 4

Then, on the roof, we used a special cap designed for this type of use.

Venting Range Hood to Roof 2

I started work in the attic. First, I assembled the pipe that came through the ceiling.

Venting Range Hood in Attic 4

It was screwed together.

Venting Range Hood in Attic

And taped using duct tape.

Venting Range Hood in Attic 2


The head lamp is very helpful to have for projects like this.

Venting Range Hood in Attic 3

Then, I leveled the pipe coming out of the kitchen to make sure the pipe going outside would be straight.

Venting Range Hood in Attic 5

I then took a pencil and marked on the inside of the roof where the new pipe would be going. This wasn’t easy because the pipe was further than a pencil length away from the roof. So I taped my pencil to a stir stick, and used that to get the extra length I needed.

Once I had my hole outlined, I found the center and drilled a hole. I wanted to cut the hole from outside so I would use that as my starting point on the roof.

After the hole was drilled, I went to the roof with my flat pry bar, utility knife, and jigsaw. I used the flat pry bar to loosen the shingle there the hold was drilled, and the shingle above it.

Venting Range Hood to Roof

I used the utility knife to remove some excess shingle material prior to using the jigsaw.

Once I had removed the shingles, I was ready to cut my hole.

Cutting Hole in Roof for Range Hood

Melissa was in the attic for a couple of reasons. First, she covered the pipe with a towel so that no debris fell into the open vent.

Towel to Catch Debris in Attic

Second, she was relaying how close I was cutting to the lines on the inside of the roof.

I used my jigsaw to cut out an initial hole that was smaller than needed. She was also apparently there to take photos of me through the hole.

Wyatt on Roof for Range Hood

This worked pretty well, but the hole ended up a little lop-sided at first. We thought that would happen, though, so we had planned to make it a little smaller to allow for adjustments.

Hole in Roof for Range Hood

After the initial cutting, I was able to trim up the hole by eye to get the hole to the right size. Once the hole was the right size, we test fit the oversize pipe in the hole and marked it on the roof line (where the pipe came out of the roof).

Inserting Pipe Into Hole in Roof

From that line, we added the height of the flashing and a couple more inches for the cap.

Venting Range Hood to Roof 5

We marked that line and cut the pipe to length with the tin snips.

I went back to the roof to pass the pipe down the hole, while Melissa went back to the attic to hold the installed pipe. I slide the flashing under the shingle above the hole and started to push the pipe into the attic. Once we had them dry fit, I was ready to start sealing everything up.

Venting Range Hood to Roof 3

I started by laying a thick bead of caulk all of the way around the flashing and sticking that down to the roof.

Then, using roofing nails, I nailed it down. Next, I laid thick beads of caulk down under the shingles that overlapped the flashing to protect from any water leaking. I re-laid the shingles and caulked around the rest of the flashing.

Venting Range Hood to Roof 8

I secured the cap to the pipe with screws and tightened it up to finish the outside work.

Venting Range Hood to Roof 7

Finally, I went back up into the attic to screw the remaining pipes together and tape them with the duct tape.

Taping Vent Pipe In Attic

Ever vented a range hood to the roof? So far, we’re really happy with how the project turned out!¬†

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