Installation Instructions

3
When installing UltraDeck
®
decking, gapping guidelines must be followed to ensure that gaps
between decking and end gaps allow for proper expansion/contraction, drainage, and the
shrinking of treated wood joists that can happen over time.
3/4"
1/32" to 1/4" Gap
Per Gapping Chart
Surface Screwing
Nailer Boards
An additional nailer board will need to be added to the framing material at any butt
joint connection to properly end gap UltraDeck
®
planks. See Figure 2.
Plank & End Gapping:
*For QuickCap
TM
end gapping, see page 8
!
T-Clips
TM
Install two UltraDeck
®
T-Clips™ to each board at every end gap. The additional
nailer boards must be used to aid in supporting the deck planks and proper
T-Clip™ placement. See Figure 2.
Rustic™, Natural™, & Fusion
®
For every 16' of plank, allow a 1/16" gap for every 20°F temperature difference between the
time of board installation and the maximum expected temperature (refer to the end gapping
chart, Figure 1). With all fastening methods, make sure to use two fasteners for attachment of
deck boards to each joist.
DekMount
Install DekMount onto each joist by screwing a 3/4" premium screw through side
hole in DekMount. Install deck planks one at a time, from the house or walled
structure, working your way outward.
Surface Screwing
When using screws through the top side of decking, at each end of the plank,
pre-drill and sink screws at least 3/4" away from the edge of the plank to prevent
splitting. Do not over tighten the fasteners. See Figure 3.
Note: UltraDeck® Post Sleeves are designed to t over dimensional 4x4 posts. If the 4x4 posts you are using are outside of
standard, trimming or shimming of the 4x4 edges may be required. Check t of the 4x4 post into the Post Sleeve prior to
attaching it to your deck structure and make any changes to the 4x4 if needed.
4x4 Post
Joist Members
Reinforcement
Blocking
Rim
Joist
(2) 1/2” x 6” Lag Screws
5-1/4” Apart
A deck board installed as a joining board at
the seams will minimize the look of end to
end contraction by separating the visual gap.
End Gapping Solutions
4x4 Post
Rim
Joist
Joist
Members
Reinforcement
Blocking
(3) 3” Screws
Installing Posts to Deck Substructure:
Step 1: Determine the location and install the 4x4 treated posts to the substructure. The maximum
post spacing is 6' between posts. Do not notch 4x4 railing posts unless using Method 3.
Step 2: Use blocking that is the same size and dimension as the joist members to reinforce the side
of the 4x4 post opposite the rim joist.
Step 3: Use three 3" quality deck screws for attaching each end of blocking to joist.
Step 4: Secure 4x4 treated post to the rim joist and reinforcement blocking using two 6" lag screws
(with a minimum spacing of 5-1/4" apart.) Countersink the lag screws if using UltraDeck
®
Cladding.
*For deck designs including railing
2
Note: Method 3 railing will require U-Top-It posts. See Method 3
on page 14 for installation instructions.
Fig. 1
Fig. 3
Fig. 2
Additional
Nailer Boards
Additional
Nailer Board
UltraDeck
®
T-Clips
™
1/32" to 1/4" Gap
Per Gapping Chart
T-Clip
Fig. 2