Table of Contents
Advertisement
NOTE
37
install the vent sections:
• Locate and mark the vent centerpoint on the under-
side of the roof, and drive a nail through the
centerpoint.
• Make the outline of the roof hole around the
centerpoint nail.
• The size of the roof hole framing dimensions
depend on the pitch of the roof. There
1-inch (25.4 mm) clearance from the vertical vent
pipe to combustible materials.
• Mark the roof hole accordingly.
• Cover the opening of the installed vent pipes.
• Cut and frame the roof hole.
• Use framing lumber the same size as the roof
rafters and install the frame securely. Flashing
anchored to the frame must withstand heavy winds.
• Continue to install concentric vent sections up
through the roof hole and up past the roof line until
you reach the appropriate distance above the roof.
This also pertains to vertical vent systems installed
on the outside of the building.
To locate the vent and
a
Hide quick links:
Advertisement
Table of Contents
