Can You Install Radiant Floors Over Existing Flooring?

Planning for Installation

When installing radiant floors over existing flooring, it’s essential to assess the condition and type of the existing floor. A good rule of thumb is to install the radiant floor system at least 2-3 inches below the existing floor level. This allows for adequate space for the hydronic tubing, insulation, and a solid base for the new flooring. For instance, if you’re planning to install a 2-inch thick radiant floor system, you’ll need to remove existing flooring that’s less than 4-5 inches thick to achieve the required clearance.

Preparing the Existing Floor

Before installing the radiant floor system, the existing floor must be prepared to ensure a smooth and even surface. This involves checking for any unevenness, rot, or damage and making the necessary repairs. The existing floor should also be dry and free of any old adhesive, as this can compromise the new flooring’s adhesion. If the existing floor is made of plywood or oriented strand board (OSB), it’s recommended to install a new layer of plywood or OSB on top of it to provide a solid base for the radiant floor system.

Installing the Radiant Floor System

Once the existing floor is prepared, the radiant floor system can be installed. This involves laying out the hydronic tubing in a grid pattern, followed by the installation of insulation and a solid base for the new flooring. The tubing should be spaced at a maximum of 12 inches apart to ensure even heat distribution. The insulation should be installed around the tubing to prevent heat loss and ensure optimal performance. The new flooring can then be installed on top of the radiant floor system, following the manufacturer’s instructions.