Loose Wire – NADWS

Warmup’s cable is double-insulated with advanced fluoropolymers. That’s because it carries a very high Ohms resistance in order to provide heat outputs 25%-40% than any other cable on the market. Comes with a 30-Year warranty.

Can I Cut the Electric Floor Heating System Wire if I Have too Much?

This page explains why Warmup does not recommend you cut the wire for any reason and provides solutions to having too much cable.

Can the Floor Heating System Work Without Installing the Floor Sensor Probe?

While you can operate your floor heating system without installing the floor sensor probe, there are good reasons to install it.  Click “Read More” for detailed information.

Why does my floor get warmer in some spots?

Your floor can reach higher temperatures in some areas where furniture, area rugs, dog beds or other fixtures are trapping the heat. Click “Read More” for details.

What type of thinset should I use with my Warmup system?

This page explains the type of thinset recommended and installation methods.

How to repair an electric floor heating cable system

Here is an instruction sheet that will guide you through the repair process of a damaged heating system wire.

Can Warmup electric heating be installed in a shower?

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

I nicked the wire slightly; do I need a repair kit?

When slight damage is caused to the wire, a visual assessment needs to be made. Read more.

Can the cold tail lead be cut?

Yes, you can trim the cold lead but must leave at least 3ft past the factory joint. Click “Read More” for details.

Can a wooden floating floor be installed directly over the Warmup NADWS system?

This page discusses installation methods required for installing a Warmup heating system under a floating wood floor.

If I have too much mat or cable, can I cut it?

No, you should never shorten the heating wire. Click “Read More” for details.

Can I install the electric heating cable directly on top of the plywood ?

YES: wood is a natural insulator, no need of extra insulation.
Exception: if this is a non-insulated crawl space under the plywood, in that case we would recommend the use of insulation boards prior the installation.

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:

Was your electric floor heating system installed directly over a concrete sub-floor?

How does this effect your heat up times?  Click “Read More” for an explanation.

Specialized installation – under Nailed Hardwood

Floor heating can work under nailed hardwood as well.  Click “Read More” for detailed instructions to do it the right way.

Floor Heating Loose Wire Installation Video

Seeing is believing, so check out our installation video to see just how easy it is to install Warmup’s floor heating loose wire.  Click here to view it.

Is the electric floor heating system wired correctly?

Be safe and follow these important reminders before troubleshooting your floor heating system.  Click “Read More” for instructions.

Should I use Self-leveler or Thinset ?

Using self-lever or thinset depends on the type of flooring being installed and preference. 

How do you stick the insulation boards to the concrete slab ?

You can stick the insulation boards to the concrete slab using regular modified or pre-mixed thin set. We recommend a 1/4 x 1/4” trowel.

Can I use an uncoupling membrane with the NADWS cable ?

Warmup now offers our own DCM-PRO cable, which is a custom designed cable compatible with all uncoupling membranes.

How do I check if the cable is working ?

The only way to see if the cable is going to work and is not damaged is to use an ohmmeter to check the resistance between the heating conductors matches what it should be in the manual or on the box.

Need also to check and make sure that there is no resistance to the ground conductor.

Confirm there is enough power being supplied to operate your electric floor heating system.

Follow these suggestions related to your power source to ensure excellent performance of your floor heating system.  Click “Read More” to learn what to do.

Can I install a wooden floating floor directly on top of the cable ?

NO: cable must be embedded in thin-set or self-leveling compound. Once dry, the floating wooden floor will be installed on top. Alternatively, select the FOIL heating mats which can be installed without thin set.

Can I connect more than one cable to the thermostat ?

YES: if the total load of the cables does not exceed 15 amps.

Once a repair has been completed, can I replace the tile right away?

Upon completion of a repair it is completely safe to apply thinset and tile. Read more.

The Factory Joint Rule

The factory joint MUST be installed in the floor. Click “Read More” for details.

Should I use a 120V or 240V electric floor heating system?

As a rule of thumb, when you are using electric floor heating on an area over 130 sq ft, you will likely use a 240v system(s).  Click “Read More” to find out why.

Can I connect one cable to another (series connection) ?

NO: each cable must be individually connected to the thermostat (connection in parallel).

What is the EMF level of Warmup cables?

Our cable was tested and measured 0.5 mG at 1/2” (a typical distance between the cable and your feet). This measures at 1/200th of the acceptable value of 100 mG as established by the WHO and Intertek/ETL. It therefore complies with EN50366.


Why does my floor heat unevenly?

If wire spacing and floor height isn’t consistent, your floor may not heat evenly. Click “Read More” for details.

Do I choose electric cable or mat floor heating systems?

While both options utilize the same advanced floor heating wire, each one has installation benefits depending on the actual shape of your room.  Click “Read More” to find out why.

How long will my system take to heat up?

It depends on a lot of factors, but a classic installation over ¾” plywood with NADWS spaced at 3” would take about 30 minutes to heat from 60F to 80F. Click “Read More” for details. 

How do you stick the insulation boards to the concrete slab ?

You can stick the insulation boards to the concrete slab using regular modified or pre-mixed thin set. We recommend a 1/4 x 1/4” trowel.

What do I need to prepare for my electric floor heating project?

Before you order your floor heating system, there are a several things you can do in preparation. Read this before your start!

Make sure that the floor probe that came with the thermostat was installed and done so properly.

It is vital that the floor heating thermostat’s floor probe was not only installed but done so the right way.  Click “Read More” for details.