How To Put Chimney Flashing On Metal Roof

Trace the outline of the base of the rubber boot onto the metal roof with a pencil.

How to put chimney flashing on metal roof.

Rivet the pan flashing to the sidewall flashing. Place a second piece of 8 inch 20 3 cm flashing against the chimney. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. A cricket is sloped like a tent roof to deflect water around the chimney.

Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in. Hammer 2 roofing nails into the flashing and roof. Begin by applying masonry primer to the base of the chimney. The roofing the cricket valley and the chimney base flashing all come together at the chimney corners and must overlap in the proper order.

Base flashing has several components. Using a compass draw out the chimney s diameter. Place a small drop of caulk where the roof and chimney meet at the chimney corner. Slide the rubber boot over the pipe to check the fit.

When the chimney penetrates the roof below the ridge use a cricket on the up slope side to divert water around the chimney. Screw it down in a way that its fits tight over the humps of the metal roof. Trim the flashing in the center of the rubber boot with a roofing knife so it fits snugly around the pipe. Use your feet to flatten the flashing down over the contour of the roof.

Cut and fold pan flashing to fold up the back of the chimney and over the sidewall trim. Place the chimney where it would be related to the stove and mark the center of the chimney on the ceiling. A continuous sheet metal apron across the chimney s downslope face l shaped step flashing running up both sides and when the chimney sits below the roof ridge a cricket or saddle running across the upslope face. Drill a small hole in this spot to mark the chimney s center.

Then spread the plastic roofing cement along the base flashing sheet underside and simply place the flashing around the base of the chimney and over the shingles. After screwing it down securely do another bead of silicone around the edge also put some silicone on all the screws as well. Place the step flashing over the caulk and onto the chimney. Apply sealant to sidewall flashing where pan flashing tabs will overlap.

Pan flashing should extend at least 12 inches up the roof plane. Install two layers of butyl tape sealant under perimeter of pan flashing. When installing a chimney for a wood stove on a metal roof you ll first need to assess the position. Use mortar nails to secure the base flashing to the chimney.

Secure a shingle over the corner flashing using a hammer and roofing nail. Remove the rubber boot.