Radiant Heating Tube System Imaging Houston, TX Residential
Houston, TX
Project Overview
OmniVueNDT was contracted to perform a 3d subsurface assessment of a radiant heating system embedded within a residential concrete subfloor in Houston, TX. The objective was to accurately map the in-floor heating tubes to prevent damage during future construction activities.
A high-frequency 2.0 GHz Ground Penetrating Radar (GPR) system was used for this project, providing precise imaging of both the radiant heating tubes and the reinforcing steel within the slab.
Challenges in Radiant Heating System Mapping
Radiant heating systems are typically installed by securing plastic heating tubes to the top layer of steel reinforcement or wire mesh before pouring the concrete. These tubes are non-metallic, making them difficult to detect using conventional metal locators.
An alternative method for mapping radiant heating tubes involves using infrared thermography. A thermal camera can detect the temperature contrast between the heated tubes and the surrounding concrete, providing a lateral position estimate. However, this approach does not provide precise depth information, making it less effective for accurate construction planning.
GPR-Based Solution & Data Processing
Using 3D GPR scanning, OmniVueNDT provided a detailed subsurface map of the radiant heating system (See Picture 1). The scanning process involved:
Real-Time GPR Imaging - Captured 3D spatial data of the heating tubes and reinforcement.
Data Processing & Assessment - Interpolated radar cross-sections (radargrams) were analyzed to create a linear model of the heating system layout.
3D Vector Model Creation - The final dataset was processed into a 3D vector model (See Picture 1), allowing precise visualization of:
Pink curved lines - Representing the in-flor heating tubes.
Green and yellow lines - Indicating the lateral and longitudinal rebar reinforcement.
Picture 1 - The results of 3D GPR data assessment. Pink curved line represents in-floor heating tube. Green and yellow lines indicate later and longitudinal rebar reinforcement.
The processed 3D vector model was then exported in .DXF and .SHP formats, making it compatible with AutoCAD, BIM (Building Information Modeling) and other design platforms.
Project Outcome & Engineering Benefits
By integrating non-destructive evaluation (NDE) and non-destructive testing (NDT) techniques, OmniVueNDT provided a highly accurate subsurface map, allowing for:
Safe construction planning - Preventing accidental damage to heating tubes
Depth and spatial accuracy - Ensuring precise placement of future modifications.
Seamless integration with CAD & BIM systems - Enhancing project design workflows.
With detailed imaging and precise data outputs, the shape, depth and layout of the heating tubes are now fully visible, supporting efficient and risk-free construction.
