Installing under tile radiant heating

But there are still some concerns to attend, including at least:. Your website gives me the information that I am as well to use particle board water pipe retainer than the expensive pre-constructed boards, I hope to find a 3mm polystyrene sheet coffee cup type material which can be placed between the existing concrete floor and the particle board before tiling on top of that.

Thanks for the very nice note, Robert. We work hard to provide researched, unbiased and useful information so I'm really happy when a reader finds it so. The material might also serve as a vapor barrier, since it's waterproof, and there's no reason not to also opt for a teensy bit of insulation too. The thin material you describe is indeed readily available if you shop for it in packaging and wrapping materials. I'm unclear on just how you plan to install, secure in place, and cover your radiant floor tubing.

Particularly, how do you plan to hold the tubing in place between the subflooring and the insulated slab? Key is keeping the tubing as high as possible in the design. Steve used a full inch of plywood over the tubing set in the concrete. Your tubing, atop the concrete, will lose less heat into the concrete than Steve's design.

But I'm not sure about what the radiant heat tubing manufacturer will say about how the plywood bears directly on the tubing - is compression a concern? In this design I'd give a call to the manufacturer of the tubing you plan to use. Ask for technical help from one of their engineers, and ask about your design and get her recommendations. Be sure to review the proper operating temperature range for the tubing too.

Would the grout gaps create the biggest problem in that regard due to insulation? If a manufacturer deems the wood safe over radiant heat, could it still pose a problem over the tile? Riki, I would have at least two concerns with what you proposed. One is that you will reduce the heat output from the floor and two you may find that the heat from the radiant system actually damages the flooring causing gaps or warping or it may colors off-gassing.

So you should not install engineered wood flooring or other flooring products over a tile floor that contains radiant heat without first discussing your plan with the manufacturer of the new flooring system. Can you install engineered wood flooring over tile with radiant heat underneath? If so, do you need to add any barrier between the layers? The radiant heat system is estimated to be about 20 years old from previous owner Thanks.

SC It may be quite reasonable to add a layer of thin-set tile on top of existing tile radiant heat floor. However I would want to diagnose the cause of the tile cracking first. It also may be helpful to include crack isolation membrane material under the the new thindet tile floor.

Our relative has a house with radiant floor. Do not the type of radiant floor. Keep in mind that some will insulate the side edge all the way down to the footing. For more details on insulating methods, please read our Design and Construction Suggestions Manual.

Once the insulation is in, the next step is to layout the radiant tubing. If you install the Crete-heat product then this part is easy. Simply step the tubing into the nubs. If you used traditional foam board then you still have a couple of options.

Some will staple the tubing down to the foam using Pex staples and a special gun which makes the work go quickly. The only downfall is that the staples can be somewhat expensive. Another option is to attach the tubing to the wire mesh or rebar using zip ties. This is the most common method because the zip ties are inexpensive and most are willing to sacrifice a little time if it means saving a lot of money. These are also called heat transfer plates or aluminum fins. A study conducted by Kansas State University some years ago showed that systems using heat transfer plates vs.

The significance is that you can typically lower the water temperature and reduce cycle times which can lower your operational cost. Radiantec also conducted our own plate study experiments and you can find the results here.

The most cost effective solution is to install the thin heat transfer plates in continuous coverage. Staple-up radiant install showing difference in plated vs. This picture shows the benefits of full aluminum heat transfer plate coverage vs.

Both areas were on the same zone and operated for the same amount of time. Our general rule of thumb is to space the aluminum plates continuously in carpeted rooms, bathrooms, and high heat loss areas such as great rooms.

Aluminum heat transfer plates in continuous coverage. Photo of aluminum reflective barrier installed in one joist bay for radiant floor heating. Insulation is usually put in after this see next step so if you can find a foil faced insulation with high enough R-value, you can forgo this product. If you can only do this once because the ceiling will be finished then the answer is absolutely yes. The amount of insulation is dependent on what is above and below.

If there is carpeting or a high heat loss area above then you should put in R If not, you can probably get away with R but R is better. Staple up insulation detail above a crawl space. If there is an unheated basement below then you should use R If the heat loss downward is entirely wasted to a crawl space, for example, then your insulation method should be extensive.

You should try to get in a minimum of R Some will insulate between the joists with fiberglass and then seal the entire underside with rigid foam. If the ceiling will not be finished, some will wait and see how the system performs and then add the insulation after if necessary.

Since radiant heat will go in all directions, the heat will just as easily go downward. Aluminum is expensive. We get it! Everything we do and everything we quote is for the sole purpose of creating the most energy efficient system possible. This in turn will save you money every single day that you operate the heating system. Will a radiant system without aluminum plates work?

The problem is, air is an insulator and Pex directly in contact with wood is a poor conductor. In order to make up for this poor heat transfer, the water temperature must be raised significantly.

In some cases, as high as degrees F.! Even then, on a cold day, the floor may not put out enough heat to heat the room if the home is older and not energy efficient. Also, you may not be able to use a water heater as the heating source because the system requires much warmer water to make up for the poor heat transfer.

In turn, your project may not be a great candidate for a solar hot water assist, either. Little luxuries like this are what makes a house a home. The ability to uniformly heat a space is one of the greatest benefits of radiant heating. Forced-air heating systems rely on vents to heat a room, meaning that the closer you are to the vent, the warmer you typically feel.

Likewise, the corners that are farthest from the vent take longer to heat up. Radiant floor heating, on the other hand, heats up the entire floor evenly and at the same time, creating a consistent temperature throughout the room and eliminating cold spots. Electric radiant heating systems, specifically, can heat up within half an hour to an hour.

As such, homeowners can set the radiant heating to be on only when rooms are in use by using a programmable thermostat or manually, so that no energy is wasted. To further improve the energy efficiency of hydronic radiant heating systems, homeowners can choose a system with highly conductive panels so that their boiler is taxed less.

Forced-air systems also suck the humidity out of your space leaving the air and your skin feeling dried out. Rather, radiant floor heating can help create an indoor environment lower in air allergens and can help you balance your space with a comfortable humidity.

Install radiant heating throughout your entire home, in one room, or even in just part of a room. Electric radiant heating systems are virtually maintenance-free after installation and often come with warranties of 25 to 30 years.

Wi-Fi or programmable thermostats allow you to control the heating easily. Hydronic heating systems require slightly more maintenance , but are still highly manageable. Heated floors are a smart idea if you eventually plan to sell your home. In a study of four million homes sold in and , Zillow found radiant heating to be among the most valuable upgrades homeowners could make to increase home value.

Certain floor coverings are well-suited for in-floor heating applications. For example, floor coverings such as hardwood and engineered wood can be ineffective thermal conductors, leading to energy loss.

Wood products can also be damaged by water and heat, and carpet fails to meet any of these requirements. When paired with ceramic tile, radiant heating can be used anywhere in your home.