Installation Guide

17
12B
12C
15
MODIFICATIONS & SPECIAL CASES
13. USING THE TREX RAINESCAPE
4X4 POST FLASH
»
Install the trough as shown in 12A.
»
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.
12B. RAILING 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)
»
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)
13A
13B
13C
13E
13D
POST SLEEVE
BEFORE INSTALLING THE POST FLASHING,
APPLY A BEAD OF BUTYL CAULK 1" ABOVE
THE TROUGH, THEN SLIDE THE POST
FLASHING DOWN
APPLY TAPE TO THE TOP OF THE
TROUGH OVER THE BLOCKING,
OR ANYWHERE THERE MAY BE
A PENETRATION FROM NAILS
OR DECK SCREWS
TOP VIEW SIDE VIEW
APPLY TAPE TO THE FLASHING AND
THE TROUGH MATERIAL
IF USING A POST SLEEVE APPLY TAPE
TO THE FLASHING AND THE POST
IF NOT INSTALLING A POST SLEEVE,
CUT POST FLASHING TO THE TOP
OF THE FINISHED DECK