Great Alternative to a Thin Slab

SubRay is an easy way to install radiant floor heating on top of existing frame or slab floors. SubRay can be installed as a whole-house heating system, or used to heat a basement or room addition.

Compared to Thin Slabs, SubRay is . . .

• THIN — 5/8" or 3/4" thick.
  
• LIGHTWEIGHT — Less than 2 lbs. per square foot.
  
• FAST RESPONDING — Twice as responsive as gypsum-based concrete.
• AN EASY INSTALLATION — No need to wait weeks for the slab to cure. No scheduling problems with separate subcontractors.
  
• MOISTURE-FREE — No hundreds of gallons of moisture to manage.
  

Compared to Other Slab Alternatives, SubRay is . . .

• CLEAN — No messy silicone needed.
• TWO SIZES — 15 mm (5/8") for 3/8" RadiantPEX; 18 mm (3/4") for 1/2" RadiantPEX or Onix.
• SILENT — Floating design. Won’t pop or squeak like some aluminum plate systems.
• QUALITY — Cabinet-grade, Group 1 Baltic Birch. Meets specs of all wood flooring manufacturers.
• ECONOMICAL

SubRay Warms ANY Cold Floor:

For slabs or frame floors

Pictured: Tile floor over SubRay system, over frame floor

Anatomy of a SubRay Radiant System Header Sticks hold radiant pipe at each end of the room on 8" centers. Sleepers are 6" wide and installed 2" apart. Sleepers support the finish floor. Grippers are used to hold RadiantPEX® where it enters or exits the floor. Radiant Tape reflects radiant energy to the floor. Aluminum Conduction Rolls evenly spread the heat. Corner Sweeps help RadiantPEX make 90° turns. C-Covers protect radiant tubing from nails; or support tile backer board. Note: All wood components made of Group 1 Baltic Birch.

Order the individual pieces for your installation
	Header Sticks: Cabinet-grade Baltic Birch Header Sticks are used to hold loops of radiant tubing at opposite ends of a room. Special Patent-Pending design holds PEX without squeaking or popping. They are made in two thicknesses, 15 mm and 18 mm. Order 15 mm components for 3/8" PEX; order 18 mm for 1/2" PEX, 1/2" RadiantPEX-AL or 3/8" Onix. They are CNC routed to precise dimensions to give you a precision-fit radiant subfloor. We use only Group 1 density or better as required by hardwood floor manufacturers to ensure fastener holding capacity. Each stick is 42" long and contains three bends. If using strip hardwood flooring, run sticks the same way as (parallel to) the flooring. Allow for enough length of Header Sticks to run along two opposite walls, or no fewer than six Header Sticks per 100 sq.ft.
	Sleepers: Cabinet-grade Baltic Birch Sleepers are installed 2" apart to form the 2" radiant channels that hold the radiant tubing. Sleepers are made in two thicknesses, 15 mm (for 3/8" PEX) and 18 mm (for 1/2" PEX and 3/8" Onix). Allow about 30 Sleepers for each 100 sq.ft. of floor.
	Grippers: Made of Group 1 Baltic Birch and are used for holding PEX tubing. Holds down with one screw. They are made to the same thickness as the Header Sticks and Sleepers. They are not required for Onix. They are normally 2" wide, but make sure the Gripper measures exactly 2" before using it as a spacer for the Sleepers. Use two Grippers for each PEX circuit, where it enters/leaves the floor.
	Radiant/Reflecting Tape: The tube in the radiant channel emits infrared heat. The 2" Reflecting Tape sends this heat back to the floor above. Use a tape dispenser to speed up the installation. Use one roll for each 240 sq.ft. of floor
	Aluminum Roll: Install Aluminum Conduction Rolls above the Sleepers, not below. Locating aluminum above the pipe reduces thermal striping. Try it and see for yourself. Each strip should be spaced about 1/2" apart, and installed perpendicular to the Sleepers. Do not cover the Header Sticks with aluminum if your finish floor is nailed down. Use one roll for every 70 sq.ft. of heated floor.
	Sweeps: This CNC-routed piece provides a nailing surface where the PEX turns a corner between the Header Sticks. Most rectangular rooms will need one or two Sweeps per pipe circuit.
	C-Covers (optional): Heavy steel covers that fit in the radiant channels. They come in 15 mm and 18 mm thickness. Typically used to protect supply/return lines that may run parallel to nailed strip flooring. Also used under superthin tile floors to support cement boards. Protects the tubing against errant nails or other fasteners. See manual for more applications.

See our MasterHEAT Pricing page for itemization & ordering information