How To Install Flashing On Metal Roof Around Vent Pipes

Slide the rubber boot over the pipe to check the fit.

How to install flashing on metal roof around vent pipes.

Figure 1 install shingles just below vent pipe. Another popular method for flashing vent pipes is by using a rubber flange. Remove the rubber boot. In this video i cover installing a roof boot for a vent pipe in a metal roof.

Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place. Use your finger or a tool to smooth the silicone around. Now that the old flashing is gone you can slide the new flashing over the pipe vent and maneuver it under the shingles above the pipe. The metal i m using is called crinkle black i purchased all my materials at h.

Figure 2 cut shingle to fit over vent pipe. If there is a split in the shingle along the edge of the flashing be sure to caulk the edge of the flashing. Continue the next row of shingles cutting a hole for the vent pipe. Trim the flashing in the center of the rubber boot with a roofing knife so it fits snugly around the pipe.

Momentarily lift the boot and apply sealant to hold the flashing in place. Apply the last row of shingles that is just below the vent pipe as shown in figure 1. I like to put a bead if silicone around the base of the flashing as well. The vent pipes are usually 1 1 2 to 3 inches in diameter.

After screwing it down securely do another bead of silicone around the edge also put some silicone on all the screws as well. Use one roofing nail in each corner of the flashing to secure it to the roof. Metal roof flashing installation. How to flash a metal roof.

Leave the bottom of flashing exposed so only the sides and top are covered by shingles. A quick step by step guide on how to flash a metal roof. Installing a roof plumbing vent is typically an easier task than flashing a chimney. Use some asphalt roof cement under the cut shingle and around the vent pipe as shown in figure 2.

When installing shingles where the is a vent pipe you will install the shingles up to the bottom edge of the pipe. Trace the outline of the base of the rubber boot onto the metal roof with a pencil. Cut your shingles precisely to leave at least half an inch around the base. Install shingles as normal up to the base of the plumbing vent.

This type of flashing is more commonly used on metal roofs.