WANT TO DO IT YOURSELF?

INSTALLATION GUIDE

We recommend to read the installation guide carefully before setting up or consult with a contractor available near you. Also be mindful to check with your local building codes, approvals and restrictions. In our detailed instrction guide, you would have complete undestanding of deck building and designing. To have the best results, please follow the specific instructions step by step.

TOOLS NEEDED

a. Circular saw (24 tooth carbide blades).
b. Nail gun or hammer for Step-Clip™ strip fastening.
c. Cordless screw gun for pre-drilling holes, screw fastening & Stainless steel Fastenerclip installation.
d. Non-marring dead blow hammer or mallet for tapping boards into place.
e. A pinch bar for setting boards in tights places.
f. Always use personal safety equipment when using tools.

VENTILATION AND DRAINAGE

1. To perform properly, Deck Tech Australia Ever grain or Expression decking must be installed with proper drainage and ventilation. Ensure that:
a) The joists are level across each span and that there is a slight slant of the deck [ 3 mm for every 2.4 m] away from your home for drainage.
b) The substructure has at least 51 mm clearance above ground level.
c) Skirting or fascia does not impede airflow under the deck.
2. Where ventilation is minimal or obstructed, flow through or soffit venting must be added around the perimeter of the deck to create cross ventilation under the entire substructure to avoid accumulation of moisture and humidity.
3. Never attach DTA decking to any solid surface, watertight membrane, concrete, or existing decking.

FRAMING YOUR DECK

1. Use Australian Standards joist sizing and span tables to determine best joist sizing for deck frame constructions.
2. Use H3 CCA or LOSP (90 x 45) treated Timber for joists that is strength graded to Australian Standards. Use H4 CCA or LOSP (90 x 90)Timbers for bearers.
3. Install deck framing vertically with the 45mm side in contact with the decking. Do not install decking on framing that has been installed flat with the widest dimension in contact with the decking as this may cause debris and moisture to be trapped between the framing and decking.
4. Never use DTA decking as structural members when constructing the support structure of your deck.
5. Use maximum 450mm (or less) joist spacing for Ever Grain or Expression range profiles if the decking is to be installed perpendicular to the joist.
6. Use 400mm on center joist spacing for DTA boards if the decking is to be installed at an angle (maximum 45°angle).
7. Confirm that joist sizing and spacing is compliant with local and state building code agencies.
8. If heavy equipment is going to be installed on the deck such as a hot tub, consult the equipment manufacturer for specific requirements for framing and support.
9. If a “breaker / divider board” or “picture frame” deck installation technique is utilized, the board(s) that will be installed parallel to the deck joists will require additional framing and should also be shimmed approximately 3.2 mm depending upon framing conditions to match the crown height of the adjacent decking running perpendicular to these boards.

USING DECK TECH AUSTRALIA’S DECKING AS STAIR TREADS

1. Do not space stringers wider than 200 mm on centre for Ever grain profile decking on stair treads.
2. Overhang for stair treads must not exceed 51 mm. . .

Blocking Is REQUIRED Where the End of Two Deck Boards Meet

When the design of the deck requires a run that is longer than the board length or it is a unique design, blocking (“sistering”) or additional framing is required. (Fig. 1)



1. Sharing Stainless steel FastenerClips between two boards at butt joints is allowed, but the ends of each deck board must be individually supported.

2. Sharing Step-Clips™ between two boards is NOT allowed. Sister additional framing where butt joint occurs then trim a Step-Clip™ strip to accommodate each board and attach separately to the additional framing.

3. Transition/divider boards or other intricate designs require additional blocking or framing. See “Framing Your Deck” section.

BOARD SPACING AND GAPING

All decking expands and contracts slightly as a result of temperature and change

1. When installing Ever grain or Expression profile deck boards using any of the fastening methods outlined below…
Always space boards to provide the following minimum gaps to allow for these changes:
a. Side to Side… 5.5 mm. (Stainless steel Fastenerand Step-Clip™ hidden fastening systems will automatically set this spacing)
b. End to End… typically 4.5mm depending on board length and temperature (see Chart 1 - “Deck Spacing”).
c. Structure… typically 6.5mm between all decking and any structure or post (see Chart 1 - “Deck Spacing”).
Note: If the deck is located near or around a tree, be sure to allow for future growth of the tree.

COLOR &  ORIENTATION OF DECKING BOARDS

We recommend that you lay out the deck boards before final installation to ensure an acceptable color mix. DTA™ Hardwoods Collection colors feature a variegated appearance with contrasting light and dark shades of color. Laying out a preferred pattern of deck boards before installation will help to achieve a desired appearance.

DECK BOARD FASTENING METHODS

There are 2 methods that can be used to fasten DTA Ever grain or Expression ranges of decking.


1. The stainless steel Fastener Hidden Fastening System.

a. Install a DTA Starter profile board using capped composite deck screws 16 mm from the outer board edge. Screw down the outer edge of the DTA Starter profile board at every joist location. #10G x 70mm color matched, capped composite deck screws are recommended for face-fastening DTA™ decking, and for the outer board edge of the Siesta starter profile boards in a grooved profile decking installation.

b. Do not overhang DTA Starter profile board over joists by more than 25 mm widthwise and 51 mm lengthwise.

c. Always place one Stainless steel Fastenerhidden fastener in the slot in the board edge at every joist, between deck boards, regardless of the joist spacing. (Side to side spacing is maintained by the Stainless steel Fastenerhidden fasteners.)

d. Starting at one end… slide the next DTA profile board onto the exposed Stainless steel FastenerClips of the first board and install a single Stainless steel FastenerClip at one end of the out-board edge to hold the board in place.

e. While standing on the new board and straddling each joist, pound it tight into the clip with a non-marring dead blow hammer. Repeat steps “c” through “e” for the remaining boards, installing Stainless steel FastenerClips at each joist.

f. Always face-fasten the outer most edge of the first and last board with capped composite deck screws when using Stainless steel Fastener Hidden Fastening System.

g. The above information is describing the ‘pre-loaded’ Fasteners for timber joist fixing. For metal joist construction the Fasteners blocks are available with the trim-head screws supplied separately to the blocks.

HELPFUL HINTS:

• Store Stainless steel Fastener Clips indoors before use. Fastener Clips install best between 4°C and 27°C.
• Use a non-marring dead blow hammer as necessary to tap the Stainless steel Fastener Clip into the slot.
• A non-marring dead blow hammer can also be used to help secure the next Ever Grain or Expression board into place.
• If the joists are uneven, apply pressure to the deck board where it does not touch the joist. As pressure is being applied, tap the board into the Stainless steel Fastener Clip using the non-marring dead blow hammer.
• In the case of a low joist, shim the Stainless steel Fastener Clip as necessary to seat in the slot in the edge of the deck board.
• Take a measurement of the total width of the installed boards to make sure they are parallel every 3-4 courses.
• Walking along joists and non-secured deck boards can be dangerous and is therefore not recommended.
• Use a non-marring dead blow hammer as necessary to tap the Stainless steel Fastener Clip into the slot.

2. Installing Deck Tech Australia Ever Grain and expression range boards with steel Hidden Fastener System:
a. Use #10G x 70mm capped composite deck screws when installing DTA Ever grain Collection or Expressions profile decking.
b. When using non-capped composite decking fasteners (as outlined above), pre-drill and countersink for the screw size (#8 x 70mm typical.)
c. Two fasteners are required at each joist, one on each side of the board, regardless of the joist spacing.
d. Drive fasteners straight and directly through the deck boards at a 90° angle to the decking surface. Do not “toe nail” or drill at an angle.
e. Never place fasteners closer than 16 mm from the edge or ends of the board.
f. For the best appearance, use a white chalk line to ensure straight fastener lines. Colored chalk can stain the decking and can be very difficult to remove.
g. When using Hidden Fastening System with surface screws and plugs, please refer to the instructions on the container to ensure the most up-to-date installation method.

HELPFUL HINTS:

• In the case of a low joist, shim the deck board as necessary before securing the deck board.
• Take a measurement of the total width of the installed boards to make sure they are parallel every 3-4 courses.
• Walking along joists and non-secured deck boards can be dangerous and is therefore not recommended.

FASCIA AND RISER BOARD INSTALLATION

1. Fasten fascia and riser boards using #8G x 50mm stainless steel capped composite deck screws. Use three fasteners equally spaced across the width of the fascia board at the top, middle and bottom locations of the board (2 fasteners for riser board) and spaced approximately every 305mm along the length of the board. Never place fasteners closer than 16 mm from the edge or ends of the board.

2. When decking boards are installed picture framing the deck, fasten the fascia board to the rim joist, leaving a 3.2 mm gap between the top of the fascia and the bottom of the deck boards. Decking boards should not overhang the outer rim joists by more than 51 mm.

3. When decking boards are installed without picture framing the deck trim the deck boards so they run past the outer rim joists by less than 51 mm. Fasten the fascia board to the rim joist, leaving a 3.2 mm gap between the top of the fascia and the bottom of the deck boards.
Note: Never Install fascia by drilling into the decking. Always install the fascia into the joist and always pre drill and counter sink the fascia board.

DECK SPACING (CHART#1)

DTA capped composite decking will expand and contract slightly due to temperature change. Use the chart below to determine the spacing between board ends. A gap of at least 5.5mm is recommended between deck boards and fixed elements like foundations, walls, pool edges, etc. If the deck is located near or around a tree, be sure to allow for future growth of the tree.


Temperature at Install (°C)

4-13 - 6.4mm

14-21 - 4.8mm

22-35 - 3.2mm

36-43 - 1.6mm

Over 43 -0.8mm

Care & Maintenance

1. To maintain the appearance of your DTA Ever grain or Expressions decking… sweep periodically and clean spills with soap and water. Additional care and cleaning instructions are available online at dtaus.com.au/resources.


2. The use of pressure washers is not recommended unless using for low pressure (1600 psi or less with fan tip) wetting and rinsing. High pressure washing may damage the surface of the decking. Always test all cleaning products on an inconspicuous area before using on the entire deck surface.