Handy Father already had an article on how to build floating stairs, but this post gets into more detail on the actual process used when they were being installed, step by step.
Related book: Building Stairs (For Pros By Pros)
There are many different ways how to build floating stairs, but this step by step illustration is only one. If you build your own floating stairs, HandyFather.com would love to feature your design in an article as well.
How to build floating stairs step by step
Step 1 & 2: These stairs were build in a basement, so the 2×4 wall posts were lag bolted to the concrete block wall. The inner stringer was lagged to the 2×4 wall posts after the stringer support braces were attached. Multiple screws were used for added stability.
Step 3: The floating stair step treads made. These step treads are 1 7/8″ thick by 14″x36″. They are custom made hardwood treads. An Amish man in Indiana made them.
Step 4: Step Supporting. The second stair stringer was installed using multiple screws as well as liquid nails for added stability. These floating stairs need vertical support as well. Notice also that “L” shaped brackets are attached already. It is easiest to install these before the second stringer is installed.
Step 5: Leveling boards. Floating stairs shown below with leveling boards that were made to ensure treads had a level surface to sit on. Step braces are finished and ready for the stair tread installation.
Step 6: Install Floating Stair Treads. Progress on first steps, adding wood face support and treads- had to start at the top and work your way down. Underside of steps: Five lag bolts and multiple screws to lock tread in place with leveling wood plate underneath the tread. Use Liquid Nails on all the wood joints.
This is ultimately this handy father’s design, and other than the custom treads (which he had an Amish man make) everything else was built/designed by him. He had to pre-drill all the lag bolts into the steps because of the wood being a hardwood (he broke a handful of lags because of this).
Liquid Nails was used in excess to ensure added security.
This has been How to build floating stairs step by step instructions. Please leave a comment below, or tweet @HandyFather if you have any questions or to share your own project with other Handy Fathers like yourself.