trex-rain-escape-deck-waterproofing

How To: Waterproof a Deck with Trex Rain Escape


Finding a cost effective solution for how to waterproof a deck in order to provide a usable outdoor living space underneath has long been an often expensive problem. Traditionally – Vinyl Decking has been the solution, but what if you want a more attractive product on your decking surface, like Exotic Hardwood or Composites like Trex? Well – we now have a solution for that, with an innovative product called Trex Rain Escape.

INTRODUCING TREX RAIN ESCAPE

This easy to use system consists of a series of roll-out troughs that create water channels down each joist run to an adjustable downspout which has been designed to work with a variety of joist depths and standard guttering systems. Read more about how Trex Rain Escape became here and to see how simple this system is – check out the short installation videos below. We’ve also included a PDF Installation guide below – which is available for download here.

trex rain escape

TOOLS & PREPARATION

Tools: Scissors or utility knife, staple gun, caulk gun (Fig. 1).
Prep: Read all instructions completely before beginning. Place a midspan nailer on the underside of joist to keep them straight.

MATERIALS ESTIMATOR

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DOWNSPOUT INSTALLATION

Step One: Installing the Trex RainEscape Downspout

  • Cut downspouts along one 12” or 16” side on score mark based on joist spacing
  • Install all downspouts along rim joists and/or ledger board; cut-out side towards open deck bay
  • Downspout should extend 1” into gutter: cut or extend as necessary.

TROUGH INSTALLATION

Step Two: Installing the Trex RainEscape Trough

  • When working with the Trex RainEscape trough material, ensure that the smooth/shiny side always faces up. (Do not seam or overlap the troughs to extend its length)
  • Line up the 1 1/2” score with the second joist.
  • At the ledger slide 3” of trough under existing siding or flashing ensuring trough sits on top of ledger board.
  • Place first staple at ledger board on inside joist to tack trough.
  • Unroll trough to downspout using 1 1/2” score mark on inside joist as guide.
  • Cut length to back wall of downspout, cutting a 1” wide by 3/4” tab at center edge of trough (fold tab down) to prevent wicking.
  • To remove memory from sheet, backroll the last few inches of the trough.
  • Pull trough tight ensuring memory is released and place second staple on inside joist through downspout.
  • On outside joist, form a trough into downspout while lining up the edge of trough with outside of joist. Place third staple through trough and downspout on outside joist.
  • Pull corner at ledger and outside joist tight keeping entire length of trough smooth and wrinkle-free; place fourth staple on outside joist at ledger.
  • To test for correct slope, pour cup of water on trough at ledger board ensuring water runs to downspout.
  • Continue stapling every 6” to 8” from ledger to downspout on both joists to secure.

VIEW TREX DECKING

Step Three: Tape all Seams

  • Trim excess trough at seams, keeping overlap.
  • Using Trex RainEscape Tape, tape ALL seams, joints and perimeter.

NOTE: Trex RainEscape Caulk can be used instead of tape, if preferred. If using caulk, caulk must be applied between ALL product overlaps and between product and decking on perimeter of deck.

INSTALLATION WITHOUT LEDGER BOARD / FLASHING

INSTALLATION WITH LEDGER BOARD / FLASHING

MATERIALS ESTIMATOR

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DO’s DONT’s
DO make sure your joists are
straight and square. Gutters
should have outlets every
12’ to 14’.
DO NOT staple Trex RainEscape products
anywhere other than over or into floor joists,
ledgers, rim joists, headers, etc.
DO make sure when installing
the troughs to use one
continuous length of the trough
material.
DO NOT use spiked hidden fastners. Call Trex
RainEscape (1-800-BUY-TREX) for directions.
DO make sure the trough is
wrinkle free and has proper
fall to the downspout.
Check with local agencies
for permits and codes prior
to any electrical installation.
DO NOT stand anywhere other than directly on
top of floor joists, ledgers, rim joists or headers
as the Trex RainEscape system will not
support you.

INSTALLATION GUIDE (pdf)


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