How To Seal A Vent Pipe On A Metal Roof

Insert the roofing membrane with the backing removed through the pipe.

How to seal a vent pipe on a metal roof.

Cut away the old caulk from around the vent pipe. Apply a thick bead of lap seal caulk around the seam between the vent pipe and old rubber gasket. Chimney pipes on metal roofs must be flashed in order to create a watertight seal around the pipe and prevent leaks through the roof. Remember to allow for the lip on the vent mechanism that will fit over the opening and rest on the surface of the roof.

Apply silicone caulking around the area where the vent pipe penetrates the roof. Using the tape measure determine the size of the cut into the roof that will be necessary to insert the vent into the space. Oatey retro master roof 4 in x 8 in aluminum vent and pipe flashing american metal products 4 in x 14 75 in aluminum vent and pipe flashing. Roof water damage repair small hole in roof leaking metal roof how to stop.

Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe. Then run a second bead of caulk just below the. Plumbing vent pipes on house roofs are covered with a metal square of flashing and sealed with silicone caulking. The flashing of the vent pipes prevents water from getting into the house.

Seal the roofing membrane by applying silicone caulking in the area where the roofing membrane comes in contact with the pipe. Measure the body of the vent. Find quality vent pipe flashing online or in store. Use the knife blade to scrape the pipe clean and smooth.

Record those measurements on a notepad.