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W415-0788 / A / 09.22.09
5.7.6 INSTALLING FLASHING AND STORM COLLAR
Remove nails from the shingles above and to the sides of the chim-
ney. Place the fl ashing over the vent pipe and slide it underneath the
sides and upper edge of the shingles. Ensure that the vent pipe is
properly centered within the fl ashing, giving a 3/4" margin all around.
Fasten to the roof on the top and sides.
Do not nail through the lower portion of the fl ashing. Make weather-
tight by sealing with caulking. Where possible, cover the sides and
top edges of the fl ashing with roofi ng material.
Apply waterproof caulking around the vent, 1" above the top of the
fl ashing and push the storm collar down into the caulking. Attach a
rain cap to the top of the last vent section.
STORM COLLAR
FLASHING
CAULKING
WEATHER
SEALANT
SECURELY
ATTACH VENT
ADAPTER TO
FLUE COLLAR
4” “B” VENT
7” OPTIONAL
VENT PIPE
3 FT
MIN
2 FT MIN
10 FT
FIGURE 5.7.5b
FIGURE 5.7.6