Spiral Staircase Construction Step-by-Step

A spiral staircase allows you to move from one level of a house to another. They are ideal structures for homes with limited space. They add a focal point to a room and serve both function and style in the home. Here's how to install a spiral staircase.

Step 1 - Determine the Placement of the Spiral Staircase

Spiral staircases are ideal for midlevel floor changes or transition areas for a loft to the main floor. You want to make sure you place the staircase in an area with plenty of room for a turning radius and that the staircase is not built too close to a wall. Allow for adequate headroom at the top of the spiral staircase and clearance for the handrails (at least 1 to 2 inches).

Step 2 - Obtain Permits and Purchase Kit

Many localities require a building permit for the construction of stairs, patios, and decks. This requirement helps to keep you safe and prevent damage or injury due to poor or sloppy work that is not performed to code. Before ordering a spiral staircase kit, check with the building inspector’s office and obtain the necessary permits.

Step 3 - Remove the Staircase from the Kit

Remove the pieces for the staircase from the kit and do an inventory check to determine if any pieces are missing. You should have a complete set of risers and steps, staircase posts, handrails, and balusters. If any piece is missing, contact the retail or manufacturer immediately.

Step 4 - Follow The Manufacturer’s Instructions

Follow the manufacturer’s instructions, which accompanied the kit. The instructions should guide you through the installation of the posts, risers, stair steps, handrails, and balusters.

Step 5 - Attach the Posts

The posts will be secured with screws on the bottom and top. Line the posts up with the top beam to make sure that the screws make contact and the post is secured. After setting the posts and making sure that they are set at the appropriate distance from each other, the risers will be attached. The posts will come with markings so that you know where each should be placed.

Step 6 - Attach the Risers and Steps

The steps will attach to the risers and should have pre-drilled holes to allow them to be secured. If not and if instructed to do so, drill holes into the steps in order to attach them to the riser.

Step 7 - Attach the Handrails and Balusters

Follow the instructions carefully for attaching the handrails. You will be required to use the level to position the handrails and secure them to the posts. Once in place and secured, the balusters will be secured an equal distance to the risers and handrail. The balusters will provide additional stability and strength to the staircase assembly.

Once you have completed the assembly of the balusters, the project is complete. Clean up any dust or excess debris that may have accumulated and enjoy your new spiral staircase.