Heating Mats – NADWM

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Warmup’s radiant electric floor Heated Mats, also called “StickyMat”, or NADWM, is an electric underfloor heating mat system. Installers install our heated mats in regularly-shaped areas. In addition, users find our heated mats provide even heat distribution as they are manufactured with the utmost superior material.



NADWM---Heating-Mat

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How to Check the Resistance Readings of your Electric Floor Heating System


If you purchased a Digital Multimeter from Warmup you will have 2 connectors. Please make sure that the contacts that will be plugged into the multi-meter are properly exposed.

Can I Install a Warmup System Under Carpet Tiles?


The Warmup DCM-PRO or StickyMat system may be used under carpet tiles as long as it is embedded in latex based modified polymer self-leveling compound prior to the installation of the carpet tiles. 

How do I test my system using a Megger (Mega-Ohmmeter)?


The megger is used as a quality control measure to test the insulation resistance to detect any fault in the heater cable jacket. Such leaks cannot be spotted with a regular ohmmeter and help spot any damage to the cable and cable jacket.

Is GFCI (Ground Fault Circuit Interrupter) Required for Bathrooms?


Thermostats with an internal GFCI including the Warmup 4iE and WUDG will fulfill this requirement. If a non-GFCI thermostat like our Tempo thermostat is being used, a GFCI breaker will be required. Consult with your local electrician to make sure your installation is properly protected and meets National and Local Electrical Code.

Can I Install my Floor Heat over an Existing Sheet of Vinyl Floor?


If using a DCM-PRO membrane, scrape/scratch and prime the vinyl to ensure bonding with a highly modified thinset and install the membrane directly to it.

Can you heat under glass mosaic tiles ?


Yes you can heat under glass tiles. The thin-set holds the heat. The glass (silicon) isn’t a very good conductor but the thin-set does the work.

Can I connect one Warmup heater to another in series?


Connecting one system to the other in series is often referred to as “daisy chaining”. Each floor heating system must be connected individually to the operating floor heating thermostat.

Can the cold tail lead of your Warmup indoor heating system be extended?


This page explains how to extend your lead wire or connect your heater to a thermostat in a remote location.

Can the lead of your Warmup heating system be trimmed?


This page will give you pointers about trimming your cold lead to fit easier in the conduit and electrical box.

Do I choose cable or mat electric floor heating systems?


This page explains the difference of the mat and loose cable options but ultimately either the cable or mat option will give you the design freedom you are looking for.

Can Warmup Electric Heating be Installed in a Shower?


This page discusses the recommended practices of installing Warmup mats or cables in a shower.

Can I install my Warmup system directly on top of plywood ?


This page outlines installation recommendations when installing over a plywood sub-floor.

Can I connect one Warmup heater to another in series?


Connecting one system to the other in series is often referred to as “daisy chaining”. Each floor heating system must be connected individually to the operating floor heating thermostat.

Can I connect more than one Warmup heater to a thermostat?


As long as all systems that connect to the thermostat do not exceed 15 amps, running multiple leads up the conduit to the thermostat location is completely acceptable.

Was your electric floor heating system installed directly on a concrete slab?


Without a thermal break, the concrete acts as a heat sink. Therefore, the heat is drawn first into the concrete sub-floor before your floor covering. This is why Warmup recommends installing Warmup Insulation Boards over the concrete sub-floor to act as a thermal break. This forces the heat radiate upwards first rather than down into the concrete slab. Warmup insulation boards can increase ramp up time by over 70% and decrease heat loss by over 90%.

Can I replace tile immediately when repair is completed?


After completing a heated wire repair it is safe to replace the needed tile. Make sure your resistance readings are correct before re-laying the tile after the repair is completed.

Floor Probe Installation Instructions


The thermostats come with a 9’ sensor cable to detect the temperature under the floor finish. The end of the probe wire contains a capped sensor that should be evenly centered between two heating cables at least 12” into the heated area. At no time should the probe wire cross the heating cable.

Can I install a 120V mat on one leg of a double pole breaker?


There is no neutral leg on a double pole breaker and the polarity between the two sides does not match. This will cause the thermostat to trip and/or it will send too much voltage into a 120V heater.

Can I cut my floor heating mat if it’s too large?


Instead, try pulling the cable off the mesh and spacing the cable every 2 or 2.5 inches apart. Consult your installation manual with further questions regarding where the cable or mat can be run.

How to install a floor heating mat around a drain in a shower ?


While you must NEVER cut the wire, the mat system is designed to allow you to separate the wire from the mesh. The unusable mesh can be cut away from the mat. Now that you have freed the wire, you can install the wire around the area using hot-glue or tape to secure the cable away from any drains or screw-mounts.

How do I install the factory joint which is thicker than the heater wire?


If it is not installed in the floor, the joint may give and your system will no longer work. Not only will your warranty be voided but you will have to repair the joint and place it back into the floor. The joint connects the heated wire to the unheated lead. NEVER leave the factory joint exposed to air and do not place it in or behind the wall.

Electric Floor Heating Mat Installation Video


Warmup electric floor heating mats are designed to make installation easy. Take a peek at our brief installation video to see for yourself.  Click here to view it.

What are the electrical requirements for my Warmup system?


Please verify that the circuit can handle the amount of amperage your heating system requires. Your thermostat can only handle up to 15 amps so if you are connecting multiple heaters to one thermostat location, you may need to use a relay and a larger breaker. Your or your electrician can find out the amperage rating of your specific floor heating system in installation manual or printed on the box. Note: Just because the Warmup thermostats are dual voltage, this does not mean you can supply any voltage to your heating system. You must supply the voltage supplied to the voltage of your specific heater.

How do I use my TDR Meter?


The TDR Meter is used to measure the distance to an existing fault in the wiring of your heating system. It sends an electrical pulse into the connected cable, traveling along the cable until it reaches the fault and then that pulse is sent back to the TDR. The time it took for that pulse to reach the fault and travel back is measured and converted to a distance reading that will appear on the TDR Meter.

Check the Resistance Readings of your Electric Floor Heating System


If you purchased a Digital Multi-meter from Warmup you will have 2 connectors as shown below. Please make sure that the contacts that will be plugged into the multi-meter are properly exposed as illustrated below. It is possible that you may have to remove some of the sheathing from the connector ends to expose them enough to make the needed contact with the multi-meter in order to receive accurate readings.

Warmup Shower Installations


When installing a curbless shower, you are only required one heating system for the bathroom and the shower. However, if the shower has a curb, you will need two separate systems:

How Long will my Electric Floor Heating System Take to Heat Up?


It depends on a lot of factors, but a classic installation over ¾” plywood with NADWM mats would take about 30 minutes to heat from 60F to 80F. Click “Read More” for details. 

How to install a floor heating mat around a drain in a shower.


While you must NEVER cut the wire, the mat system is designed to allow you to separate the wire from the mesh. The unusable mesh can be cut away from the mat. Now that you have freed the wire, you can install the wire around the area using hot-glue or tape to secure the cable away from any drains or screw-mounts.

Will the Electric Floor Heating System Work Without the Floor Sensor Probe?


While you can operate your floor heating system without the floor sensor probe it is better to have it installed.  Click “Read More” for detailed information.

Installation tips for the Electric Floor Heating Mat System


You will want to review these floor heating installation tips before you begin your electric floor heating installation project.  Tips such as how the factory joint is positioned to how to extend the unheated lead.  Click “Read More” for details.

Are you getting a “Ground Fault” error after a few years?


That “Ground Fault” error on your thermostat after several years could indicate your floor heating system had been damaged during installation.  Click “Read More” to learn why.

Can the cold tail lead of your Warmup indoor heating system be extended?


This page explains how to extend your lead wire or connect your heater to a thermostat in a remote location.

Can I connect more than one Warmup heater to a thermostat?


As long as all systems that connect to the thermostat do not exceed 15 amps, running multiple leads up the conduit to the thermostat location is completely acceptable.

Can the lead of your Warmup heating system be trimmed?


This page will give you pointers about trimming your cold lead to fit easier in the conduit and electrical box.

Was your electric floor heating system installed directly on a concrete slab?


Without a thermal break, the concrete acts as a heat sink. Therefore, the heat is drawn first into the concrete sub-floor before your floor covering. This is why Warmup recommends installing Warmup Insulation Boards over the concrete sub-floor to act as a thermal break. This forces the heat radiate upwards first rather than down into the concrete slab. Warmup insulation boards can increase ramp up time by over 70% and decrease heat loss by over 90%.