Hi, I am looking to build a low level deck on existing concrete. Currently the concrete falls away from the house to a strip drain at approx 1m from the house then slopes back up. Due to low clearances at the worst point on the house line i only have 90mm from top of concrete to the existing floor level (where the entry door is). At this point what type of footing and structure system could i use?
Welcome to the Bunnings Workshop community @courtneyw. It's fabulous that you've joined us and many thanks for your question.
We need to work out your available height for structure and footings. We know the decking is going to be 19mm thick, so that leaves you with 71mm. The only real option for joists would be turning 90 x 45mm H3 outdoor framing timber on its 90mm face. The 45mm thickness gets removed from the remaining 71mm to give you 26mm clearance under the timber for air-flow and drainage. The Builders Edge 25-40mm Pedestal Foot Minifoot has a minimum adjustment of 25mm and would be perfect to support your joists. These pedestal feet would be a great choice as they can be adjusted to suit your slope.
You might like to start your own discussion about your project so we can delve deeper into it and provide more feedback. Please include as many details as possible, which might include a diagram and images of the area.
We look forward to following along with your project and please let us know if you have any questions.
Thanks for the reply Mitchell! That clears up what i was thinking with the structure under the low clearance portion, thanks for the assistance