Installation Guide
Page 9
Installing AZEK Rail Stairs with Balusters
• Rotate Rail assembly 
out of way to fasten 
Support Block.
Pre-drill 
7/64”
#8 x 3/4” 
Coated 
Screws
Center screw 
aligned with 
rail centerline
Pre-drill 
INSTALL RAIL ASSEMBLY
INSTALL BOTTOM SUPPORT RAIL
• Attach Mounting Brackets to Bottom Support Rail.
• Secure Mounting Brackets to posts.
• Wedge Foot Block under Support Rail & Attach.
8
7
Brackets must be 
installed to the stair 
tread side of the rail.
For sections up to 6’: 
Place one Foot Block in 
the center of the rail.
For sections 6’ to 8’: 
Space two Foot Blocks 
approximately at 1/3 
intervals on the rail.
Pre-drill through 
Bottom Support 
Rail with 3/16” bit
Bottom 
Support Rail
#8 x 3” 
Screws
Mounting 
Brackets
#8 x 3” Green 
Coated 
Screws
Pre-drill 
7/64”
• Mark ends of Support 
Rail. 
• Secure Mounting 
Brackets to Posts.
Position rail assembly 
over Bottom Support 
Rail.
Position rail assembly 
over Bottom Support 
Rail.
Pre-drill 
7/64” 
#8 x 3” 
Green 
Coated 
Screws
#8 x 3” 
Green 
Coated 
Screws










