1. On top of the compacted earth or sand, install a vapor barrier.
  2. Lay down at least 2″ of rigid foam insulation.
  3. Install the wire mesh or rebar for the concrete slab.
  4. Attach the tubing to the wire mesh or rebar using plastic zip ties.

Also question is, how do you install radiant heat in tubing?

General Rules of Thumb for Concrete Slab Underfloor Heating Installations

  1. On top of the compacted earth or sand, install a vapor barrier.
  2. Lay down at least 2″ of rigid foam insulation.
  3. Install the wire mesh or rebar for the concrete slab.
  4. Attach the tubing to the wire mesh or rebar using plastic zip ties.

Furthermore, what size PEX tubing should I use for radiant heat? The most common sizes of PEX Pipe for Radiant Heat Systems is 3/8 Inch, 1/2 Inch, 5/8 Inch and 3/4 Inch. Generally, for residential Radiant Heat Systems we recommend 1/2 Inch PEX Tubing. The PEX Tube size dictates the flow rate that can be achieved and thus the maximum loop length of the pex tube.

Simply so, how do you install heated concrete floor?

  1. Measure and Design the Template. Electric radiant heating systems use wires embedded in a mat laid right on your concrete.
  2. Prepare the Floor and Mat. Make sure your concrete has completely cured before you lay down your in-floor heating mat.
  3. Fit the Mat.
  4. Install the Mat.
  5. Finished Flooring.

Can you run PEX in concrete?

Yes, PEX pipe can be installed under a concrete slab. Since PEX pipe is supplied in coils, installation can be completed in one continuous length without the need for extra fittings. In cases where PEX pipe penetrates a concrete slab, it must be protected with a nonmetallic sleeve at the penetration point.

Related Question Answers

How long does radiant floor heating last?

35 years

How long should radiant loops be?

The important thing to remember is that most zones consist of multiple parallel “circuits” or “loops”, and a loop should be no longer than 400 ft. (300 ft. for ½ PEX tubing). This is because after the hot water travels through 400 ft.

How do you prepare a concrete floor for underfloor heating?

How to prepare your floor for underfloor heating
  1. Clean the area of all debris and dirt.
  2. Fit the insulation boards neatly and stable ideally with all gaps and joints taped.
  3. If using liquid screed, a membrane of between 500 and 1000 gauge must be laid as crease/fold free as possible with all joints taped and no gaps.

Can you heat concrete floors?

Due to their high thermal-mass, concrete floors are ideal to be heated by an underfloor heating system. Concrete provides quick heat-up times and retains heat well, even storing the warmth produced by solar gain, making a heated polished concrete floor a great option to improve the comfort and warmth of your home.

How far apart should PEX tubing?

PEX tubing is usually installed within a distance of 8″. Closer spacing (usually no less than 4″) can be applied to areas with higher heat loss or floors with lower heat conductivity. Length of each tubing loop – The length of a tubing loop is directly correlated to the flow rate and heat output.

What are the pros and cons of radiant heat?

Pros and Cons of Radiant Heat
  • Uniform heating. The biggest benefit of floor-heating systems is their ability to uniformly heat a room and floor.
  • No maintenance. Electric floor-heating systems do not require maintenance.
  • No noise.
  • Non-allergenic.
  • Energy efficient.
  • Easy to install.

Is Radiant Heat expensive to run?

Electric radiant floor heating costs about $6 per sq. ft. for materials but is often less expensive to install because of lower labor costs. Unfortunately, it's far more costly to operate and therefore generally makes sense as a supplemental, not primary, heat source.

Can radiant floor heating be used for cooling?

A hydronic radiant floor heating and cooling system heats and cools a structure by circulating warm or cool water through flexible PEX (crosslinked polyethylene) tubing located underneath or within the floor. Hydronic radiant floor heating can be used alone or in conjunction with traditional forced-air heating systems.

How much does WarmBoard cost?

Warmboard panels are about $7 per square foot which is potentially about ½ the price of a completed radiant system. Check out for installation videos and additional technical details.

Is radiant floor heating worth it?

In short, if you already have plans to replace the flooring in a room, then installing in-floor heating is definitely worth it. These radiant heating systems must be installed under the flooring, which means the best time to install heated floors is when you're updating the flooring anyway.

What is the best radiant floor heating system?

Hydronic radiant floor heating

Hot water radiant floor heating systems are ideal for use in areas where the price of electricity is very high and for homes built off the power grid. Companies that offer water underfloor heating: Janes Radiant, WarmBoard, Radiatec and Infloor Heating Systems.

How efficient is radiant heat in the ceiling?

Radiant heating systems supply heat directly to the floor or to panels in the wall or ceiling of a house. It is more efficient than baseboard heating and usually more efficient than forced-air heating because it eliminates duct losses.

Can you use a hot water heater for radiant floor heat?

Because the slab installations will require less than 140 deg F water, it is safe to use a water heater to heat the radiant slabs. We will also be installing 2 separate water heaters; one to supply domestic hot water and a separate water heater to supply the radiant floor.

Can you retrofit radiant floor heating?


You can retrofit radiant floor heating beneath the floors, in effect warming the actual structure of your home. Not only is this a very energy-efficient way to heat your home, it's also very pleasant.

Can you paint heated concrete floors?

Yes! The fact that you have radiant heating in your slab floor does not inhibit your ability to paint the surface. Start with a good thorough vacuuming of the floor. Once you‘ve got it all cleaned up, apply a coat or two of a masonry block filler or “block sealer”.

How do you insulate a concrete floor?

There are two ways to handle insulating concrete floors. You can attach wood sleepers to the floor, fill the gaps with rigid-foam insulation, and then apply your finish flooring. Or, as demonstrated here, you can cover the slab with rigid-foam insulation, add two layers of plywood, and then add the finish flooring.

Can you pour concrete over underfloor heating?

Concrete is an excellent heat conductor and is easy to pour over an underfloor heating system. A floor than benefits from solar gain. In spaces where the sun is allowed to shine in, a polished concrete floor will absorb and hold the heat well.

Can you tile over concrete?

Although tile can be placed directly over a concrete slab, products such as Schluter's Ditra are designed to separate, or “uncouple,” the tile from any potential movement in the substrate and protect the tile and grout from cracking.

How do you install radiant floor heating under tile?

Table of Contents
  1. Step 1: Expose the Subfloor.
  2. Step 2: Apply a Crack-Suppression Membrane.
  3. Step 3: Install the Grids for the Radiant-Heat Wires.
  4. Step 4: Snap the Cables Into the Grids.
  5. Step 5: Mix and Spread the Thinset Mortar.
  6. Step 6: Power the Radiant-Heat Floor.
  7. Step 7: Determine the Layout.