PEX Tubing stapled to a subfloor and covered with a gypcrete or lightweight concrete topping pour provides the most efficient form of hydronic in-floor heating on suspended floors. Tubing is stapled to the platform with a manual or pneumatic clip gun for a quick and easy installation. We provide manual and pneumatic clip guns, and also rent the pneumatic tool. Check with your architect or engineers to make sure your joist structure can support the additional weight of a thin slab.