How to Attach Pex Tubing to Rigid Foam Insulation

A variety of PEX tubing is used for both heating and clean-water plumbing applications, with different versions of the tube useful for separate application types. Regardless of the tube version, installing the tubing requires much the same installation process. If you’re placing the tubing onto rigid foam insulation, you’ll need to secure it in place so that it won’t move during use. With a PEX stapler, you can secure the tubing quickly and with a minimum of effort. Each staple holds a section of the tube tightly against the board surface, allowing you to place the tubes where needed, without damaging them in the process.

PEX tubing
Utility knife
PEX stapler tool
PEX staples
Safety goggles

Instructions

- 1
  Lay the PEX tubing where needed, setting it flush against the foam-board surface. Cut the tubing at the end of the layout with a utility knife.
- 2
  Load the PEX stapler with a line of PEX staples, following the stapler manufacturer’s instructions as to the loading method. Use 1 1/2-inch staples for 1-inch foam board, and 2 1/2-inch staples for 2-inch foam board.
- 3
  Put on a pair of safety goggles to protect your eyes against possible staple breakage.
- 4
  Place the groove on the base of the PEX stapler over the tubing about an inch from the start of the tube run. Hold the stapler so that it’s parallel to the surface of the foam board beneath the PEX tubing. Press downward on the stapler handle to drive a staple over the sides of the tube and through the foam board.
- 5
  Move down the tube line about 10 inches, and then repeat the process. Continue in this manner, placing a staple every 10 inches along the line of tubing, until you reach the end.

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