The slide the boot down the pipe and leave it about 3 above the roof.
How to install a vent boot on a metal roof.
Measure the body of the vent.
In this video i cover installing a roof boot for a vent pipe in a metal roof.
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The metal i m using is called crinkle black i purchased all my materials at h.
To offer water protection around the pipe vents on a metal roof you will have to use a pipe flashing created specifically for the corrugated surface of a metal roof.
Place the new boot in the hole of the pipe and cut the boot on the line that touches the rim.
After selecting an area to install from inside the building square the template between the roof rafters and outline with a marker.
Apply silicone caulking around the area where the vent pipe penetrates the roof.
Using a sawzall cut any roofing nails in the area of the lower mounting plate flush with the sheathing.
No sales pitch or other fluff.
Insert the rubber gasket through the pipe.
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Just simple 3d animated digital instructions on how to install a pipe boot on a metal roof.
Next use a reciprocating saw with a rough in blade to cut the out the marked template.
Remember to allow for the lip on the vent mechanism that will fit over the opening and rest on the surface of the roof.
Insert the roofing membrane with the backing removed through the pipe.
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Using the tape measure determine the size of the cut into the roof that will be necessary to insert the vent into the space.
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The flashing will be fitted with an aluminum flange.
Record those measurements on a notepad.
Seal the roofing membrane by applying silicone caulking in the area where the roofing membrane comes in contact with the pipe.