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Advanced Underground Utility Locating

Heated / Radiant Floor Heating Locating & Mapping 

Advanced Underground Utility Locating

Heated floor or radiant floor locating refers to the process of identifying the location of heating elements embedded within the flooring of a building. Radiant floor heating systems are designed to provide even and comfortable heating by using either electric heating cables or water-filled tubes (hydronic systems) installed beneath the floor surface. Locating these heating elements is important for various reasons, including maintenance, repairs, renovations, and preventing damage during construction activities.

Here's an overview of heated floor or radiant floor locating:

1. Types of Radiant Floor Heating:
●    Electric Radiant Floor Heating: This system uses electric heating cables or mats installed in the flooring. When electric current passes through the cables, they generate heat, which is then transferred to the floor and the surrounding space.
●    Hydronic Radiant Floor Heating: Hydronic systems involve water-filled tubes or pipes that circulate heated water or other fluids. The heat from the fluid warms the floor, which in turn radiates heat to the room.

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2. Importance of Locating:
●    Maintenance and Repairs: Locating the heating elements is essential for troubleshooting and repairs if the system malfunctions or requires maintenance.
●    Renovations: During renovations or remodeling, knowing the location of heating elements helps prevent accidental damage to the system.
●    Construction Activities: For new construction or installation of other utilities, accurate knowledge of the radiant floor layout prevents interference and damage.

3. Methods for Radiant Floor Locating:
●    As-Built Drawings: Existing building plans might include information about the layout of the radiant floor heating system.
●    Thermal Imaging: In some cases, thermal imaging cameras can detect temperature variations on the floor's surface, indicating the location of heating elements.
●    Floor Penetrating Radar (FPR): Similar to ground penetrating radar used for subsurface utilities, FPR can help identify the presence and layout of heating elements beneath the floor.
●    Electromagnetic Field Detection: Specialized devices can detect the electromagnetic fields generated by electric heating cables, helping to locate their position.
●    Professional Assistance from AUUL: Experienced technicians can use a combination of methods to accurately locate the heating elements and provide guidance for any necessary work.

4. Challenges and Considerations:
●    The accuracy of locating methods may vary based on the type of heating system and the floor's composition.
●    Additional layers like flooring materials, underlayment, or insulation can influence the detection of heating elements.

Advanced Underground Utility Locating
Advanced Underground Utility Locating
Radiant Floor Heating Locating & Mapping

What can happen if I hit a radiant floor line? 

If you hit a radiant floor heating line, whether through accidental damage or during construction activities, it can lead to various negative consequences that may affect the functionality of the heating system and the overall building. Here are some potential outcomes of hitting a radiant floor heating line:


  • Damage to Heating Element: Hitting a radiant floor heating line can cause physical damage to the heating cable or tubing. This damage can disrupt the flow of electricity or hot water through the system, reducing its effectiveness in providing radiant heat to the space.

  • Loss of Heating Capacity: A damaged heating line may not be able to generate the necessary heat to warm the floor and the room. This can result in uneven heating, cold spots, or a complete loss of heating in certain areas.

  • Reduced Energy Efficiency: A compromised heating line may require more energy to achieve the desired temperature, leading to increased energy consumption and higher heating costs.

  • Leakage (Hydronic Systems): If the radiant floor heating system uses a hydronic setup with water-filled tubes, hitting a line could result in water leakage. This not only impacts the heating efficiency but can also cause water damage to the floor, subfloor, and surrounding areas.

  • Repair Costs: Repairing a damaged radiant floor heating line can be costly. Depending on the extent of the damage and the location of the line, it might involve removing flooring materials, accessing the damaged section, and then resealing and retesting the system.

  • Flooring Damage: In order to access and repair the damaged line, flooring materials might need to be removed, which can lead to additional costs and disruptions.

  • System Shutdown: Depending on the extent of the damage and safety considerations, the radiant floor heating system might need to be shut down until repairs are completed. This can leave the building without its primary heating source during colder months.

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  • Construction Delays: If the damage occurs during construction or renovation activities, repairing the heating line might cause delays in the project timeline.

  • Inconvenience: A compromised heating system can lead to discomfort for occupants, especially during colder weather.

  • Safety Concerns: In the case of water leakage from a hydronic system, there can be safety concerns related to potential electrical hazards or slipping on wet floors.

  • Future Problems: If repairs are not done properly, there's a risk of recurring issues, reduced system lifespan, and potential long-term damage to the heating infrastructure.

To prevent hitting radiant floor heating lines, it's important to have accurate information about the system's layout before conducting any construction or renovation activities. If you suspect damage or encounter issues with a radiant floor heating system, it's recommended to seek professional assistance from technicians experienced in radiant floor systems to assess the damage, perform necessary repairs, and ensure the system's proper functioning.

Remodels are when most heated floors are often hit, either homeowner or contractor has no prior knowledge of where the system is going or homeowner doesn't know how their system runs or the extent of the system inside of a  home. Typical cost per hit on a heated floor is between $700-$2500 with coring, repair, repouring, inspection and other costs. Don't chance it.  

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Advanced Underground Utility Locating
Advanced Underground Utility Locating

If We Can't Find It, It Can't Be Found. Contact an office near you to get a free quote. 

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