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ARDEX FLEXBONE® HEAT Membrane

In-Floor Heating Systems, 3-in-1 Membrane

  • 3-in-1 In Floor Heating, Uncoupling and Waterproofing
  • Maximum heat efficiency, more heat comfort with less energy usage
  • Single-Source, Complete System Solution
ARDEX FLEXBONE HEAT
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  • ARDEX FLEXBONE HEAT

Information ARDEX FLEXBONE® HEAT Membrane

ARDEX FLEXBONE® HEAT is an electrical in-floor heating system for use with tile or stone. The unique crossbones pattern provides less touch points between the cables and the membrane, and less air space within the mat structure, providing faster and more efficient heating of the floor covering. The unique design also allows for easy prefilling in just one pass with ARDEX high-performance mortars, or approved ARDEX Self-Leveling Underlayments can be used for easier, faster prefilling to fully encase the heat cables.

ARDEX FLEXBONE® HEAT can be used as a waterproofing layer in bathrooms and other wet areas. Ideal for large-format tile and stone installations, ARDEX FLEXBONE® HEAT is also an uncoupling membrane that helps to prevent grout joint and tile damage from underlying substrate movements.

Key Features

  • 3-in-1 In-Floor Heating, Uncoupling and Waterproofing
  • Uncoupling: protects tile and grout joints from shear movement in the substrate
  • Waterproofing: protection for use in bathrooms, laundry rooms and other wet areas
  • Maximum heat efficiency, more heat comfort with less energy usage
  • Minimal roll memory – rolls out flat every time!
  • High quality heating cables – more efficient, easier to install, less cable required
  • Ideal for large-format tile and stone installations
  • FLEXBONE® Effect: prefill with mortar in just one pass
  • ARDEX Self-Leveling Underlayments; worry-free prefill option that fully encases cables
  • Single-Source, Complete System Solution
  • 10-Year system warranty

System Warranty

Please click here to learn all about the ARDEX FLEXBONE HEAT System Warranty.

To qualify for the Warranty, please submit a completed copy of the Installation Worksheet and Warranty Validation Form via email or mailed in copy.

*Form is available in the Downloads section of this page along with complete details on how to submit for warranty submission. 

 

 

Technical Data ARDEX FLEXBONE® HEAT Membrane

Size and Coverage Available

1/4″ (6 mm) Mat
Rolls – 39″ wide x 41′ long (1 m wide x 12.5 m long) roll
Coverage of 134.5 sq. ft. (12.5 sq. m) per roll

FLEXBONE® HEAT Sheets

40 Sheets per carton
Sheet Size:  38.5” x 31”  (0.98m x 0.79 m)
Coverage: 8.3 sq.ft. (.77m2) per Sheet

 

 

Calculator ARDEX FLEXBONE® HEAT Membrane

 

 

FAQ

The small black wires are sensor probes, used to measure the amount of heat in the floor. They send a signal back to the thermostat, so it knows when the floor is fully heated. Although 2 probes are included with your system, only one is wired into the thermostat; the second probe is simply a backup should the first probe ever fail. There is a terminal block on your thermostat labeled A-B-C-D with the C-D reading “Sensor In”. This is where the sensor probe is attached.
No, the power module is a slave unit which receives instructions from the thermostat. The thermostat has a terminal block labeled A-B sensor out, and C-D sensor in. A 22-gage signal cable is used from the thermostat to the power module to receive the same instructions simultaneously to both heat wires. Thermostat labeled A-B sensor out runs over to the power module labeled C-D sensor in.
Screws 2-3 labeled LINE receive the power from your panel box to power up the unit. Screws 1-4 labeled LOAD receive the blue heat wire. Two conductors have an insulated jacket and the third wire is bare, which is the ground wire. The jacketed conductors are attached to screws 1-4. Take note that there is no polarity so either jacketed wire can go in either screw 1-4.
No, simply have the licensed electrician that installed the thermostat switch the LINE side and LOAD side wires and everything should work just fine.
The thermostats and power modules are duel rated, meaning they can be fed with either voltage. Important to note that the correct voltage entering the thermostat or power module from the electrical panel must match the voltage of the selected Flexbone Heat Cable.
The thermostat has a test button on the top and a reset button on the side. The test button will trip the built in GFCI which will stop the power feed to the heat cable, resulting in a red flashing light on the side. The reset button can be pressed whenever you want your floor to start heating again. Please note that since the thermostat is recommended to be placed on a dedicated circuit, you can also turn off the circuit breaker which will power off the unit.
No, this is simply the child lock feature. Simply trace a line with your finger between the dots and it will unlock the thermostat. The child lock feature can be turned on or off in the user settings.
No, the thermostats and power modules all contain a built in GFCI to protect from over current and electrical shock. Placing a second GFCI on the line may interfere with the built in GFCI causing nuisance tripping.
The breaker and wire sizes are selected based on the total amperage of the heating system connected to a single thermostat. Please note that our thermostats are not rated for output greater than 15 amps. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12-gauge wire with a 20-Amp breaker and loads up to 12 Amps with a 14-gauge wire and a 15-Amp breaker. Your certified electrician can assist and install your electrical connections to maintain compliance with the local and National Electrical Codes.

Contact Us

Questions? Please fill out the form below to contact us with any of your questions or concerns. We look forward to hearing from you, and we’ll be in touch shortly.

"*" indicates required fields

Name*
Address

Information ARDEX FLEXBONE® HEAT Membrane

ARDEX FLEXBONE® HEAT is an electrical in-floor heating system for use with tile or stone. The unique crossbones pattern provides less touch points between the cables and the membrane, and less air space within the mat structure, providing faster and more efficient heating of the floor covering. The unique design also allows for easy prefilling in just one pass with ARDEX high-performance mortars, or approved ARDEX Self-Leveling Underlayments can be used for easier, faster prefilling to fully encase the heat cables.

ARDEX FLEXBONE® HEAT can be used as a waterproofing layer in bathrooms and other wet areas. Ideal for large-format tile and stone installations, ARDEX FLEXBONE® HEAT is also an uncoupling membrane that helps to prevent grout joint and tile damage from underlying substrate movements.

Key Features

  • 3-in-1 In-Floor Heating, Uncoupling and Waterproofing
  • Uncoupling: protects tile and grout joints from shear movement in the substrate
  • Waterproofing: protection for use in bathrooms, laundry rooms and other wet areas
  • Maximum heat efficiency, more heat comfort with less energy usage
  • Minimal roll memory – rolls out flat every time!
  • High quality heating cables – more efficient, easier to install, less cable required
  • Ideal for large-format tile and stone installations
  • FLEXBONE® Effect: prefill with mortar in just one pass
  • ARDEX Self-Leveling Underlayments; worry-free prefill option that fully encases cables
  • Single-Source, Complete System Solution
  • 10-Year system warranty

System Warranty

Please click here to learn all about the ARDEX FLEXBONE HEAT System Warranty.

To qualify for the Warranty, please submit a completed copy of the Installation Worksheet and Warranty Validation Form via email or mailed in copy.

*Form is available in the Downloads section of this page along with complete details on how to submit for warranty submission. 

 

 

Technical Data ARDEX FLEXBONE® HEAT Membrane

Size and Coverage Available

1/4″ (6 mm) Mat
Rolls – 39″ wide x 41′ long (1 m wide x 12.5 m long) roll
Coverage of 134.5 sq. ft. (12.5 sq. m) per roll

FLEXBONE® HEAT Sheets

40 Sheets per carton
Sheet Size:  38.5” x 31”  (0.98m x 0.79 m)
Coverage: 8.3 sq.ft. (.77m2) per Sheet

 

 

Calculator ARDEX FLEXBONE® HEAT Membrane

 

 

FAQ

I have a small black wire included in my thermostat box and an extra probe included in my heat wire box. Do I use both, and how are they hooked up?

The small black wires are sensor probes, used to measure the amount of heat in the floor. They send a signal back to the thermostat, so it knows when the floor is fully heated. Although 2 probes are included with your system, only one is wired into the thermostat; the second probe is simply a backup should the first probe ever fail. There is a terminal block on your thermostat labeled A-B-C-D with the C-D reading “Sensor In”. This is where the sensor probe is attached.

I have a second heat wire in my room attached to a “Power Module”. It has a terminal block labeled A-B-C-D with the A-B labeled “Sensor Out” and C-D labeled “Sensor In”. Should I hook the black sensor probe wire to this power module?

No, the power module is a slave unit which receives instructions from the thermostat. The thermostat has a terminal block labeled A-B sensor out, and C-D sensor in. A 22-gage signal cable is used from the thermostat to the power module to receive the same instructions simultaneously to both heat wires. Thermostat labeled A-B sensor out runs over to the power module labeled C-D sensor in.

My thermostat has 4 terminal screws on the back labeled 1-2-3-4. Screws 2-3 are labeled LINE and screws 1-4 are labeled LOAD. Which screws receive power from my panel box and which screws receive the blue heat wire the runs under my floor?

Screws 2-3 labeled LINE receive the power from your panel box to power up the unit. Screws 1-4 labeled LOAD receive the blue heat wire. Two conductors have an insulated jacket and the third wire is bare, which is the ground wire. The jacketed conductors are attached to screws 1-4. Take note that there is no polarity so either jacketed wire can go in either screw 1-4.

My Line feed and load wires were reversed resulting in the thermostat not powering up. Is my thermostat now permanently damaged?

No, simply have the licensed electrician that installed the thermostat switch the LINE side and LOAD side wires and everything should work just fine.

I see the Flexbone Heat cables are offered in both 120-volt and 240-volt versions. Which voltage can I use for my thermostat or power module?

The thermostats and power modules are duel rated, meaning they can be fed with either voltage. Important to note that the correct voltage entering the thermostat or power module from the electrical panel must match the voltage of the selected Flexbone Heat Cable.

I am going away on an extended vacation and want to turn my thermostat off to my heated floor. Is there an on/off switch I can used to turn off my floor for a few months while I am away?

The thermostat has a test button on the top and a reset button on the side. The test button will trip the built in GFCI which will stop the power feed to the heat cable, resulting in a red flashing light on the side. The reset button can be pressed whenever you want your floor to start heating again. Please note that since the thermostat is recommended to be placed on a dedicated circuit, you can also turn off the circuit breaker which will power off the unit.

Each time I touch my thermostat, it comes on but the screen has 3 red dots and does not allow me to do anything. Is my thermostat defective?

No, this is simply the child lock feature. Simply trace a line with your finger between the dots and it will unlock the thermostat. The child lock feature can be turned on or off in the user settings.

I was told I need to install a GFCI circuit breaker in my panel box that feeds the thermostat?

No, the thermostats and power modules all contain a built in GFCI to protect from over current and electrical shock. Placing a second GFCI on the line may interfere with the built in GFCI causing nuisance tripping.

What breaker and wire size do I need to use for a floor heating system?

The breaker and wire sizes are selected based on the total amperage of the heating system connected to a single thermostat. Please note that our thermostats are not rated for output greater than 15 amps. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12-gauge wire with a 20-Amp breaker and loads up to 12 Amps with a 14-gauge wire and a 15-Amp breaker. Your certified electrician can assist and install your electrical connections to maintain compliance with the local and National Electrical Codes.

Contact Us

Questions? Please fill out the form below to contact us with any of your questions or concerns. We look forward to hearing from you, and we’ll be in touch shortly.

"*" indicates required fields

Name*
Address
This field is for validation purposes and should be left unchanged.