908 How To Videos
How to Build a Deck FoundationBy: Danny Lipford
Building a deck starts with a sturdy foundation. The foundation needs to be able to easily support the weight of the deck materials plus the live load of those using it. Here are the steps I take when constructing the foundation for a deck:
- Start by laying out the location of the deck foundation so it’s square and level with the house and at the proper height to line up with the interior floor.
- Mark the location of the footings for the deck on 8’ centers, and dig 2’x 2’ holes that are 2’ deep.
- Cut and tie together a grid of metal rebar that will be embedded in the concrete, and position it in the hole several inches above the bottom.
- Drive a grade pin made from rebar in the hole to mark the exact depth the concrete will be poured.
- Fill the holes with concrete to the proper height. Steel straps are embedded in the concrete to act as tie downs for the deck framing.
- After the concrete has set, lay a concrete block foundation
- Framing begins with pressure treated 2”x6” blocks caps on each column.
- 6”x6” treated sills are positioned on top of the blocks to support the floor joists.
- 2”x10” floor joists are placed perpendicular to the sills and nailed in place.
Linking all these elements together from the concrete up provides a nice, rigid platform to support the heavy deck. Watch this video to find out more.
Please Leave a Comment
We want to hear from you! In addition to posting comments on articles and videos, you can also send your comments and questions to us on our contact page or at (800) 946-4420. While we can't answer them all, we may use your question on our Today's Homeowner radio or TV show, or online at todayshomeowner.com.