Installation Guide
108
TREX
®
 SIGNATURE™ RAILING
ATTACHING FIXED STAIR BRACKETS AND RAILS TO TREX
®
SIGNATURE™ POSTS AND PRESSURE-TREATED POST AND POST 
SLEEVES/
CONTINUED
TREX
®
 SIGNATURE™
5.   Attach “flat" bottom stair rail cover to bottom stair 
rail. Align cover on one side of the bottom rail in slot 
on side of rail. Then starting from one end of rail 
snap cover onto opposing slot working down the 
length of the rail. In some cases, GENTLE tapping 
with a rubber mallet may facilitate fastening.
6.   Set bottom stair rail into bottom stair rail brackets. 
Attach bottom stair rail to bottom stair bracket using 
two self-tapping screws (provided) on each side of 
bracket.
Installing Upper Fixed Stair Brackets and Measuring 
Upper Rail
IMPORTANT NOTE: BEFORE CUTTING ANY TOP 
RAILS, MAKE SURE THAT ALL BALUSTER HOLES 
LINE UP PARALLEL WHEN MEASURING!
7.   Place two balusters into 
lower rail at each end 
closest to post.
8.   
Position top stair rail onto balusters ensuring 
balusters are fully seated in top rail (position to side 
of post) and ENSURE that balusters are parallel with 
post.
9.   
Mark a light line on posts at UNDERSIDE of rail to 
show the location of the fixed stair brackets.
10.  Remove upper stair rail and center upper stair fixed 
bracket on post above the marked line and attach 
using two self-tapping screws (provided).
1
1
6
2
7
8
10
Bottom stair 
bracket –
top rail
Top stair 
bracket –
top rail
1
1
2
9
1
5
3
2
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.










