How to Design, Plan, Order and Build a beautiful Merbau Timber Deck
1. Measure and Design it 2. Plan and Measure Up 3. Read Construction Guidelines Below 4. Calculate and Order Products needed 5. Call DIRECTLINE Timbers helpful staff anytime 6. Send us photos of your magnificent work for our Facebook page
Buy everything you need to build this Merbau Deck from the Sunshine Coast’s Premier Independent Timber Specialists – and get the best price and best service!
Call us now for expert advice on you next project Tel: 07 54792344
Design Considerations for your Merbau Deck
Merbau is highly recommended for decking.
Merbau Timber gives beautiful colour & texture to your deck.
Kiln Dried Merbau is the most popular used decking species. It is a very durable, darker brown timber.
It is very reliable and stable. Merbau decking gives rich colours and great strength. Its colour range is Light Brown or Tan to Dark Brown
Your deck is generally your primary outdoor entertaining space – it’s an extension of your indoor living space. It’s the space for celebration – its your outdoor room.
Be sure to consider the position of the sun throughout the seasons ensuring shade in summer and sun penetration in winter from the lower angle of the sun.
When planning think about the shape and elevation, covered or uncovered? What is safe and practical and finally, make it feel like home with quality outdoor furniture and décor. And don’t forget about proper lighting.
How to build a Merbau Deck:
Once you have planned the location and size of your deck there are six steps in building it:
Step 1 Timber Selection
Calculate your total length of decking boards and call DIRECTLINE to order
Step 2. Foundations
Calculate the number of stirrups and quantity of pre-mix you need and call DIRECTLINE to order
Step 3 Installing Posts & Bearers
Calculate the number of posts and bearers, galvanised bolts and hanger you need and call DIRECTLINE to order
Step 4 Installing Joists
Calculate the number of Joists you need and call DIRECTLINE to order
Step 5 Laying Decking
Calculate the number of galvanised fixing nails you need and call DIRECTLINE to order
Step 5 Coatings & Finishing Touches
Decide on the colour of finish (see our showroom for examples) you need and call DIRECTLINE to order
Components of a typical deck:
Typical sizes – however there are certainly other sizes available.
Most Merbau timber decking is sold in random lengths – set lengths subject to availability.
Posts – preservative treated pine or treated hardwood
Bearers & Joists – preservative treated pine or hardwood.
Hardwood decking boards – Merbau dressed all round.
Step 2 Foundations
Timber posts should be fixed to hot dipped galvanised steel stirrups set in concrete
A minimum clearance of 75 mm shall be provided between the top of the concrete footing and the bottom of the post as a termite inspection zone.
Posts embedded in the ground shall be a durable species
Step 3 Installing Bearers
Using the correct fixings
Setting up the correct bracing
Bearers shall be adequately fixed to posts. Where bearers sit on top of posts, fixed with proprietary post caps or brackets in accordance with manufacturer’s instructions.
Step 4 Installing Joists
Joists should be fixed on top of bearers or ledgers at 450 mm maximum spacing with either two 75 mm x 3.15 mm skew nails or proprietary framing anchors or brackets.
Nails for proprietory connectors to be hot dipped Galvanished Sizes shown in Table 4 in download PDF list.
Joists 50 mm wide are recommended because they are less prone to splitting and provide better bearing and fixing for decking boards at joins and ends.
For joists spans over 3 m, additional herringbone strutting or solid blocking should be provided in evenly spaced rows as follows.
Handrails and Balustrades Decks more than one metre above ground require a handrail or balustrade. Refer to TDS 23 for Timber Handrails and Balustrades.
Step 5 Laying Decking
Decking boards are available plain (square edged), with pencil round or arrised edges, or with one reeded or ribbed surface – although reeded have a lower life span.
Narrow boards are recommended as they shed water more readily and are therefore less prone to cupping and twisting.
Butt joints shall be staggered (i.e. not on adjoining boards). A slight back-cut will assist in obtaining a tight fit at butt ends.
Each board shall be fixed at every joist crossing with two nails.
Nail holes at butt joints shall be predrilled (80% nail diameter) to avoid splitting.
Nails shall be driven flush with surface (not punched).
Step 6 Coatings & Finishing Touches
All decks should have a finish applied as protection against the weathering effects of sun and rain.
Unprotected timber exposed to the weather will fade to a silver-grey colour and could distort and develop splitting and surface checking.
One coat of a water repellent preservative or an oil based primer plus one coat of the selected finish shall be applied to the top surface of joists and to all surfaces of decking (including cut ends) prior to fixing.
Additional coats shall be applied (to manufacturer’s instructions) to the top surface of decking after fixing.