Curved Stairs with Stone Treads

A curved staircase has been an architectural highlight for centuries. While the geometries of curved staircases are all closely related, the fit and finish options are virtually unlimited. Let's take a look at the use of stone treads overlaying a wooden stair structure. Of all available building materials, nothing presents a timeless feel more than a stone surface.

The first difference in using stone treads versus wood treads is that the stone is set onto the stair from above versus being built into the stair.

The second difference is that wood treads are still needed to support the stone, and they must be set lower than the finish surface calculated for the stair. Once the stone is set, you then have the correct surface heights for each tread.

Since woodwork and stone work are not done by the same craftsmen, coordinating the design with each company can be the most difficult part of the project. Using a professional stair company or experienced stair builder to build the staircase is very important with stone elements. Special structural considerations may need to be made, taking into account the added weight of the stone. Strict tolerances help ensure a quality outcome. Trying to rough frame the stair almost always produces inaccuracies and variances in the structure that will come back to haunt you in the final fit of the finish material. The stair builder would build the curved stair, taking into account the thickness of the stone you have selected. Once the stair is installed, your stone contractor would come to the site to take their own measurements. Once the stone is precisely cut at their shop, they will return to install it and drill any holes that may be required. Then the stair contractor would return after the stone is set to install the railing system over the top. The added cost and labor on this project will warrant careful considerations and attention to detail. This is one case where your choices will be set in stone.