How to Flash a Metal Roof for a Wood Stove

Flashing is an essential component to every stove vent and chimney that passes through your roof. By sealing the edges of the cut hole, it keeps the roof functional and waterproof. Generic roof flashing is composed of flat sheet metal, which generally does not conform to the corrugated texture of most metal roofs. If this is the kind of roof you're dealing with, your best bet is to use flexible roof flashing designed for such purposes.

Flexible metal roof flashing
Tin snips
Silicone sealant
Self-tapping screws

Instructions

- 1
  Purchase flexible roof flashing compatible with the size of your stove pipe and the pitch and material of your roof. Some designs are composed of silicone that can permit temperatures as high as 480 F. Other products can only permit temperatures to 240 F. Use the best product for your situation. Models with rectangular bases can fit whether the hole is square or circular. Circular bases are also available.
- 2
  Place the rubber cone of the flashing over the stove pipe and note where the cone should be cut so the pipe can fit through. Cut the circle out with tin snips.
- 3
  Slide the cone down the pipe, using water to lubricate the pipe if necessary.
- 4
  Apply silicone sealant around all edges of the underside of the flange, which is the base of the flashing.
- 5
  Press the flange down so it conforms with the texture of your roof. Flatten and smooth out any creases that appear. The flange on metal roof flashing is composed of aluminum, silicone or other flexible materials.
- 6
  Secure flashing with self-tapping screws, according to manufacturer instructions.

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