Premier Underfloor mats use purple-colored high-tech heating elements woven into a white polymer. The heating elements get warm and they conduct that energy to the surface of the floor. The floor becomes a large radiating surface that warms you and the room.

Most people put down the mat and then cover it with a 3/8" covering of latex modified mortar. So figure that a warm floor will be 3/8" higher than a cold floor.

The surface of your floor should not exceed 85 degrees F (29 degrees C). Your control is programmed to let your floor "set back" to a reduced temperature

Your Premier Underfloor control has a floor sensor that measures temperatures where you walk and there is a high temperature limit built in. Floors should not operate past 85 degrees F at the surface, so anything below that is a personal choice.

The answer depends on what is below your tile. Is there insulation or a heated space or a cold slab? All will affect temperature rise. From a cold start, a Premier Underfloor mat over a frame floor in a thinslab masonry construction can take a half hour or longer. However, once you get your Premier Underfloor control installed, it will typically set back your temperature to a lower setting, but not ice cold. Then you can program your control to start the system warming before you need it, so it is the perfect operating temperature when you step on the tile. The Premier Underfloor control actually learns how much time it takes to bring your floor up to temperature and makes adjustments so you don't waste energy, but you are always on a warm floor.

Wire damage happens duringinstallation. Usually, there is a sharp trowel involved. You should test your mat when you're ready to begin and during installation, but sometimes people forget to do that. If you finish your floor on top of a wire that has been damaged, we can help you find it. Then a licensed electrician can make a repair. The heating elements are small and you have to make sure the ground plane is working, so that's why licensed electricians should do the work. It's better to follow the precautions in your written manual and prevent problems.

In most cases, yes, depending on the heat loss from the room. For most people however, they already have some sort of heat available, so they use their Premier Underfloor system for floor warming, but not necessarily space heating. You may find that you can close off your heating ducts or the baseboard heaters to the room.

The people who make masonry thinset recommend waiting to make sure their products are properly cured. Look on the side of the bag or check with them to see what cure time they require.

Underwriters Laboratory specifies that this mat be installed in at least a 1/4" of masonry. This includes latex modified thinset or self leveling masonry compounds. Over these, you can put many kinds of heat-stable floor coverings including tile, stone, slate, laminate floors and etc.

We don't recommend putting vinyl flooring over Premier Underfloor because it may not be designed for a warm floor. Carpets and pads are not recommended because they insulate you from your warm floor.

Each Premier Underfloor system should have a Premier Underfloor control. You can control one mat or several mats up to a total of 150 square feet on a single control.

Install it on an interior wall out of direct sunlight. Make sure you can run the floor sensor wire from the control to the floor below.

The most popular places are bathrooms, followed by kitchens, sunrooms, mudrooms and entrys.

Insulation is always a good idea. Some types of tile backerboard have insulation built in, like Wediboard. Otherwise, if you can insulate below your frame floor, it will save energy and improve your response time.

EMF is an Electromagnetic field. These fields are all around us, but experts agree that we should minimize our casual contact with it. Some products are unshielded from EMF and they can produce more radiation than an operating microwave oven. Premier Underfloor uses two heating elements twisted together to minimize EMF to the lowest levels in the radiant floor industry.

Cover the area you want to be warm. The heat won't travel much beyond the last heating element, so always put a mat where you will be standing or walking. Use the product calculator to calculate a specific amount.

Lay out the mat and then cut the white webbing when you need to make a turn. Never cut the purple heating element.

You can always cut the white webbing, but you can never cut the purple heating element. If you have too much you can follow directions in the manual to find places in your floor to put the wire: on each side of toilet for example. Never roll up excess mat in a wall cavity. It will get hot and fail.

You can find a product calculator on this website that will estimate the operating cost based on your utility rates and the amount of floor you're heating.

Your manual shows a number of otions. For example, you can pull the wire from the webbing and secure it on your floor with hot glue. Then cover this loose wire with masonry.

No. The Premier Underfloor control has an ALCI (Appliance Leakage Circuit Interrupter) built in and it will conflict with a similar device on the same circuit.

Premier Underfloor uses 120 Volt power from your circuit box.

Premier Underfloor is UL listed for use with 120 volt power. There is no advantage, either in energy use or safety to using another voltage for this use.

You can find a list of things to NEVER DO in your installation manual. Follow these procedures as well as your local electrical code and your system will work fine.

We provide support in the United States and Canada. You can call us toll free at 1-888-432-8932 from 8 AM to 5 PM Central Time, Monday through Friday.