Hi everyone, new member, just moved into my first house and experiencing the fun of DIY.
I'm building a deck out the back door and am trying to work out what footings to use and then found the footing free option. I'm concerned that if I build too close to the house or connect decking to the house I will void my warranty with the builder. Footing free seems like a good idea if I can make it solid enough that it won't move.
I saw the post that talks about footing free bearers: https://www.workshop.bunnings.com.au/t5/How-To/How-to-build-a-low-level-deck/ba-p/45715
My questions are:
a) I have H2 type soil, is this an issue, can I still use this method to build footing free?
b) The previous post talks about H5 timber, can I swap this out for aluminium bearers?
c) Is there a product recommendation for the membrane?
d) I have crusher dust for the compacted soil, what depth does it need to be after compaction?
e) How do I ensure there is no water building up on the higher side of the bearer while still keeping my decking level?
Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thank you for sharing your questions about your low-level deck.
Let me try and answer some of your questions:
It's great that you've seen the guide to how to build a low-level deck by @Adam_W. Before going any further, I recommend visiting your local council and having a look at the rules and regulations when building a low-level deck on open ground near your house. We definitely don't want to void your warranty with the builder. Some states require that you place a gap between your deck and the house others require a termite barrier, it all depends on what the rules are.
Would it be possible for you to post a photo of the area where you plan on building your deck? Can you please also include what your proposed deck size will be? Our members can then assess the conditions in the area. We can then make recommendations on the best possible course of action.
Here are some more amazing decking resources:
If you have any other questions we can help with, please let us know.
Thanks for the feedback it is very helpful for a beginner.
For context this is where I am up to at the moment:
The plan is to fill the back yard 50mm below the slab height and then lay turf on top taking the lawn to slab height (about 50 cubic meters in total).
Under where the decking is going I have needed to fill this so that any water will not sit under the decking and become a pool. To do this I have put in Crusher Dust with the plan to compact it sloping away from the house.
Have a put in about 150mm deep of crusher dust currently:
Leaving me about 150mm to work out the decking (height of bricks).
Dimensions for the decking is about 8000x3000mm.
So as to not void the warranty of the house I don't want to connect the decking to the brickwork and will leave 10-20mm gap for termite inspections etc.
Close to the house I'm not sure how to go about setting up the posts / bearer supports.
At the end & on the sides I can do Posts at 400mm deep x 300mm wide (I think thats right?)
Actually, here is a drawing I think explains it:
So the unknown for me is what to use along the house?
You can still concrete in posts next to the house. Set them back far enough away from the wall to create your footer. The deck portion along the wall can then be counter-levered between the last footer and the house. I've created a rendering for you below to illustrate it better.
Depending on the size of the timbers you're using for the structure, you might need more support than what you've featured. Typically, 90 x 45mm pine shouldn't span more than 1000mm, and you're spanning 1500mm. Just something to consider.
Please let me know if you have any questions.
I've been reviewing the diagram and decided that the design I am aiming for won't work with that solution so I will need to attach the ledge to the house.
I'll be taking precautions to ensure the termite barrier is visible for inspections and there is a gap between treated timber and the home.
I'll be starting on the outer edge posts to frame the area tomorrow, I'll post the progress as I go.