Installation Instructions

5
DekMount Installation:
Surface Screwing Installation:
Note: When using this method, use composite deck screws, or 2-1/2" conventional deck screws.
Composite deck screws are recommended for this application, as they pull shavings into the screw
hole, eliminating the "mushrooming effect". When using conventional deck screws, you must
pre-drill and countersink for each screw to avoid the "mushrooming effect".
Begin screwing, keeping screws at least 3/4" away from the edge or end of the plank to prevent
splitting. It is necessary to pre-drill and countersink at each end of an UltraDeck
®
board. Always add
additional nailer boards at butt seams (see page 3). Do not over tighten fasteners. When fastening
Natural
TM
Radius planks, screws must be passed through the interior channel to avoid compression
of the planks (2 screws must be placed on each board at every joist).
Install DekMount onto each joist by screwing a 3/4" premium screw through side hole in
DekMount. DekMount should be ush on top of the joist and at against the side of the joist.
DekMount is easily cut with snips to t in any required length. Stagger DekMount butt joints so
they don't land in the same location on each joist. 12" is recommended for staggering of butt joints.
Install deck planks one at a time, from the house or walled structure, working your way outward.
This allows you to reach the last plank attached from beneath the deck. The deck planks should
be located and spaced using side to side and end gapping charts before screwing. Screw from the
bottom; for best results, do not screw at the edge. By kneeling on top of the plank and reaching
underneath, the screws are driven upwards through the DekMount and into the plank. DekMount
is designed to provide for a minimum of 2 holes for each plank. If the deck is elevated and is
easier to fasten from below the deck, another person should be on top of the deck, not only to
ensure proper spacing, but to provide weight; allowing the screws to securely anchor deck board.
1
2
3/4" Screws
DekMount Hidden
Fastening System
DekMount Hidden
Fastening System
Joist
1
1
*For all Rustic
TM
boards & Natural
TM
radius boards only
1
4
2
Note: Use of clamp to secure board in place prior to fastening will aid in installation.
i
Rustic boards
Natural radius edge boards
Note: For radius board installation, follow DekMount or surface screwing installation instructions.
If installing decking planks with T-Clips
TM
, follow Step 3 of T-Clip
TM
installation on nal grooved deck (at perpendicular joists only).
For deck framing perimeter applications, additional bridging joists every 16" may be required to support radius edge boards installed in perimeter applications.