How to build a deck with H3 treated Pine?

Hi Guys

I have to build up a deck with 90x45 H3 treated pine i have couple of question if anyone can help me

1) which paint i can use to protect the timber framing i m already using joist deck tape but i need to protect all of the framing

2) which screws and what size i have to used it for joists

3) I have look the treated pine screws it has 2 options one is with Countersink Head screw Drive and the other one is Countersink Rib Head Philips drive

Thanks

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MitchellMc

Welcome to the Bunnings Workshop community @savtar13. It's marvelous to have you join us, and many thanks for your question about constructing a deck.

Bitumen paint would be suitable for sealing your timber.

If you're screwing through 45mm thick joists into the end of others, I'd recommend going for Buildex RapidDrive Treated Pine Screws 10g x 100 mm (10 TPI) Climacoat - Box of 50.

You could use Zenith 8 - 10 x 100mm Treated Pine Countersunk Head Screws, but It would be worth using the thicker gauge as linked above as they are significantly thicker and will add to the rigidity of your deck.

Here's a couple of helpful guides: How to build a deck and How to build a low-level deck.

Please let me know if you have any questions.

Mitchell

savtar13

https://www.workshop.bunnings.com.au/discussion/comment/37312#Comment_37312

@MitchellMc Thanks for your help

I have started the deck and almost finished the framing structure attached the photos please have a look

Its a L shaped deck

now I have 2 questions:

First which width of merbau I need to choose 90 or 140 mm

my deck is super low max height from concrete to finishing floor is 120 mm including merbau 19 mm

It might have the drainage and airflow issues as well

Second: which type of screws do i need to use for each of them and what is your recommendations.

thanks

EricL

https://www.workshop.bunnings.com.au/discussion/comment/82715#Comment_82715

Hello @savtar13

The choice is up to you regarding deck panel sizes, I personally prefer using the 90mm sized panels as the different shades of the decking timber are more visible when laid out.

I suggest using 10g x 65mm decking screws. This is the common size used for decking panels. When you think of how it is embedded in the timber 20mm will be buried into the decking panel and the remaining 45mm will be drilled into the decking frame. So, 2/3 of the function of the screw is to hold the decking panel in place. If you happen to be in an area where strong storms pass regularly, then it would be worth putting in larger screws. Just remember to drill pilot holes for the screws to prevent splitting the decking panel.

Using stainless steel screws is always a plus. They provide excellent durability thanks to high vibration resistance that makes it difficult to unscrew them. It's low maintenance due to stainless steels resistance to corrosion

If you need further assistance, please let us know.

Eric

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