When it comes to installing balusters, a common question homeowners and DIY enthusiasts often ask is, "Do balusters go inside or outside the stringers?" The placement of balusters can significantly impact the overall aesthetics and safety of your staircase. Let's delve into this query, providing clear guidance to help you make the right decision.

Before we dive into the placement of balusters, let's briefly understand what they are. Balusters, also known as spindles, are vertical supports that connect the treads and risers of a staircase, providing both structural support and aesthetic appeal. They come in various shapes, sizes, and materials, allowing you to choose a design that complements your home's decor.

Understanding Stringers
To determine where balusters should go, it's crucial to understand the role of stringers in a staircase. Stringers are the supporting structures that run vertically along the sides of the staircase, providing the framework for the treads and risers. They are typically made of wood or metal and are cut with notches to accommodate the treads and balusters.

Stringers can be open or closed. Open stringers have spaces between the treads and risers, allowing you to see through the staircase. Closed stringers, on the other hand, have solid surfaces between the treads and risers, creating a more private and enclosed feel. The type of stringer you have will influence where your balusters should be placed.
Balusters and Open Stringers

In staircases with open stringers, balusters are typically placed inside the stringers. This means the balusters are inserted into the notches cut into the stringers, providing both structural support and a visually appealing design. The balusters should fit snugly into the notches, ensuring they are secure and stable.
To install balusters in open stringers, you'll need to measure and mark the center of each notch. Then, using a drill or driver, create a pilot hole in the center of each mark. This will help prevent the balusters from splitting when you drive them into place. Once the pilot holes are created, you can secure the balusters using screws or other appropriate fasteners.
Balusters and Closed Stringers

In staircases with closed stringers, balusters are usually placed outside the stringers. This is because closed stringers have solid surfaces between the treads and risers, making it difficult to insert balusters into the stringers themselves. Instead, balusters are typically attached to the outer edge of the stringers, providing both support and a visually appealing design.
To install balusters on closed stringers, you'll need to measure and mark the location of each baluster on the outer edge of the stringer. Then, using a drill or driver, create pilot holes at each mark. Once the pilot holes are created, you can secure the balusters using screws or other appropriate fasteners. Ensure that the balusters are evenly spaced and aligned with the treads and risers for a polished look.
Safety Considerations

Regardless of whether your staircase has open or closed stringers, it's essential to consider safety when installing balusters. Building codes typically require balusters to be spaced no more than 4 inches apart to prevent small children or pets from slipping through the gaps. Additionally, balusters should be securely fastened to both the treads and stringers to ensure they can withstand the weight of people using the staircase.
When selecting balusters, choose materials that are durable and easy to clean. This will help ensure that your staircase remains safe and visually appealing for years to come. Regularly inspect your balusters for signs of wear or damage, and replace any that show signs of weakness or instability.


















In conclusion, the placement of balusters depends on the type of stringers in your staircase. For open stringers, balusters are typically placed inside the stringers, while closed stringers usually require balusters to be placed outside. Always prioritize safety when installing balusters, and don't hesitate to consult a professional if you're unsure about any aspect of the installation process. With careful planning and attention to detail, you can create a staircase that is both functional and visually stunning.