When building owners and roofing professionals provide
weatherproofing for piping through roof decks, pipes that penetrate
roof systems often are not grouped in single locations, creating
the need for multiple locations of penetration flashings, such as
site-fabricated flashings and pitch pockets. However, this is not
NRCA's preferred method and results in an excessive number of roof
system penetrations (see "Penetration
pockets," April issue, page 62).
Instead, NRCA recommends a method that leads to reduction of
penetrations. Building owners and roofing professionals should be
aware of a seldom-used method of providing weatherproofing for
piping through roof decks: a curb and sheet-metal enclosure.
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