Installation Guide

17
18. MODIFIED DOWNSPOUTS
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For odd joist spacing you must
modify the downspout.
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Tear or cut out the front opening.
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Cut through the back of the downspout
halfway down, so that downspout fits bay opening.
»
Adjust the downspout to fit in the bay and
staple to secure.
»
Finish by taping the seam from top to bottom.
CUT DOWNSPOUT
THROUGH THE BACK
TOP TO BOTTOM
ADJUST SIZE AND STAPLE
TO THE BACK OF THE BAY
IF USING 12 & 16 O.C. FUNNELS,
MAKE SURE TO ALIGN DOWNSPOUTS
TAPE SEAM
TOP TO BOTTOM
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RUN A BEAD OF BUTYL CAULK
BETWEEN JOISTS/BEAMS
FINISH BY TAPING
OVER ENTIRE JOIST/
BEAM AND TROUGH
TO ENSURE PROPER
SEALING WHEN
ATTACHING
DECKING
17. INSTALLING A TROUGH OVER A
DOUBLE OR TRIPLE JOIST/BEAM
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Caulk between each joist/beam to
ensure a water tight seal between
the joists/beams.
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Cover the top of the joist/beam with the trough material
that overlaps into both adjacent bays. Tape seams and
trough material where screw penetration may occur.
»
Tape over the top of the triple joist/beam and
trough material that sits on top of the joist/beam.
NOTE: All wood must be covered with trough material
and taped wherever decking will be screwed.
If installing a post in this location, consult with the local
building code official prior to installation to ensure
all code and safety requirements are met.
17
TROUGH
TROUGH
TROUGH
INSTALL ENOUGH TROUGH
MATERIAL TO COVER THE TRIPLE
JOIST/BEAM AND EXTEND AT LEAST
2" INTO THE ADJOINING TROUGHS.
TAPE THE SEAMS OF THE TROUGH
MATERIAL TOGETHER
MODIFICATIONS & SPECIAL CASES
DOWNSPOUT
DOWNSPOUT
SECOND STORY GUTTER DUMPS INTO FUNNEL
TROUGH FLOW
TROUGH FLOW
16A
16B
16. DRAINING SECOND
STORY GUTTER
ON DECK
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Block out a 12" x 16" o.c. rectangle
where the second story gutter
discharges onto the deck. (16B)
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Place downspout in rectangle (do not
remove openings).
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Tape downspout in place.
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