A cable spacing of 3 studs between runs is standard. However, cable may also be spaced at continuously alternating 3 stud – 2 stud intervals in isolated areas or over the entire floor. This practice may be desirable to increase heat output (e.g., over uninsulated on or below grade concrete subfloors) or to consume more cable length in a given area (e.g., when using the standard 3 stud spacing doesn’t allow the selected cable to fit the floor area and respect minimum spacing requirements from walls, partitions, etc.) A wider spacing (e.g.,4 studs or more) is not recommended as it may not provide sufficient power to warm the floor to the desired temperature, and may cause inconsistent floor surface temperatures.
Installer should discuss heating cable spacing with the homeowner before proceeding with the cable installation. Installer should discuss heating cable spacing with the homeowner before proceeding with the cable installation.
For alternative floor coverings, please refer to Alternative Floor Coverings