12B. R AILING POSTS, 6X6 POSTS & OBSTRUCTIONS WHEN USING 4X4 POST FLASH » To install a post or obstruction on the inside rim joist, first mark the edges of the post on the trough and draw two lines, corner to corner. Cut along the diagonal lines. (12A) » Pull up tabs and install the post. » Staple remaining trough to cover flat block. (10A) » Cut the post flash into four even sections. (12B)
13A
BEFORE INSTALLING THE POST FLASHING, APPLY A BEAD OF BUTYL CAULK 1" ABOVE THE TROUGH, THEN SLIDE THE POST FLASHING DOWN
12B
13B
APPLY TAPE TO THE TOP OF THE TROUGH OVER THE BLOCKING, OR ANYWHERE THERE MAY BE A PENETRATION FROM NAILS OR DECK SCREWS
» Attach one piece to each corner of the post. (12C) » Tape starting at bottom of the trough, up the post overlapping layers to assure a water tight seal working up around the post extending down onto the trough. (12A)
13C
13D
TOP VIEW
SIDE VIEW
12C
APPLY TAPE TO THE FLASHING AND THE TROUGH MATERIAL
IF USING A POST SLEEVE APPLY TAPE TO THE FLASHING AND THE POST
13E
13. USING THE TREX RAINESCAPE 4X4 POST FLASH » Install the trough as shown in 12A.
IF NOT INSTALLING A POST SLEEVE, CUT POST FLASHING TO THE TOP OF THE FINISHED DECK
» Run a bead of butyl caulk around the post, no more than 1" above the base of the post. » Slide the post flash down over the bead of butyl caulk, and tape the flanges to the top of the trough and then tape the top of the post flash to the 4x4 post. » After decking is installed, attach the post sleeve. » If no post sleeve is used for the final deck, trim the post flash to the height of the finished deck. » NOTE: Post flash only available for 4 x 4 posts. See section 12 for other sizes and obstructions.
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