I'm building a 10x14 deck and working with hard clay soil. I'm planning to bury my 4x4 posts about 2-3 feet deep, but I'm wondering if using concrete is really necessary to ensure stability. I want to save on costs, so I'd prefer not to use concrete if it's avoidable. Also, has anyone used roofing tar on their 4x4's before burying them to help prevent rot? My deck is going to be just under 4 feet tall, and I work at a lumber yard, so I'll be using the usual stock posts we have available.
5 Answers
Instead of fighting the clay, how about setting saddles into concrete and keeping your posts above ground? This allows for better drainage, which is crucial. However, if you really want to go the wood-only route, make sure to keep drainage in mind to avoid future issues.
You might want to consider using concrete footings with post bases. I've seen people suggest setting posts on these bases to keep them dry and reduce rot. It'll help extend their life, especially in areas with high moisture. Check out Simpson ties for a solid solution!
Totally agree! Plus, there are nicer designs for post bases if you're looking for something more visually appealing.
If you don't want the hassle of rotting, consider galvanized hardware with sonotubes. It will keep your structure secure and safe long-term! Trust me, your future self will thank you for going this route instead of taking shortcuts now.
Honestly, I'd go for concrete footers with your posts on top rather than burying them directly. A lot of build codes require a sturdier base, especially for heights over about 24 inches. Just make sure to check your local codes before getting started!
Burying wood directly can lead to rot over time, no doubt about it. If you want your deck to last, you should look into concrete footings. If you're in an area where frost isn't an issue, you can keep the posts a bit shallower, but always ensure there's good drainage!
In Florida, the frost line is almost nonexistent. How deep do you suggest for the posts?
Could you show me an example of using saddles? I might consider that option!