Skip to main content

Coordination of roofing systems with other building envelope systems is paramount to successful building enclosure and in-service performance. CDC understands the complete building envelope from both the design and execution viewpoints, allowing us to anticipate and resolve issues in the specification and detailing stages so that they do not become problems during and after installation.

CDC's Design Services Include:

  • Systems and Material Selection
  • Performance Criteria Development
  • Specification Writing
  • System Detailing
  • Shop Drawing Preparation
  • Thermal Analysis
  • Wind Loading Analysis
  • Integration with Other Building Envelope Systems
  • Design Integration with Wind Tunnel Study

CDC's Construction Phase Services Include

  • Shop Drawing and Technical Submittal Review
  • On-site observation and reporting for quality assurance
  • Life Cycle Analysis
  • ROI (Return on Investment) Analysis
  • Comprehensive Maintenance Programs
  • Remedial Design and Bid Packages

Non-destructive Electrical Impedance Scanning

Electrical impedance moisture scanning uses a low-frequency electric signal to locate moisture. CDC performs nondestructive electrical impedance moisture scans to source and trace leaks in compatible roofing systems. Scans detect hard-to-find moisture below the roofing membrane and can be performed during normal working hours. Detecting leaks was previously dependent on either flood testing the membrane system or using hand-held tools to probe the leak area. Both methods are time-consuming and may not produce immediate results. Electrical Impedance Scanning delivers quicker, more accurate results. Moisture in a roofing assembly, left unaddressed, affects performance, and may ultimately result in the failure of the roofing system. By utilizing electrical impedance technology, scanning results deliver a relative moisture content value, which helps determine the amount of saturation present in the roofing assembly. Scans can be performed for both quality assurance, and leak detection, and are often utilized in concert with infrared scanning or destructive moisture testing techniques to perform a comprehensive moisture investigation.

Compatible Roofing Systems

  • Thermoplastic Polyolefin (TPO)
  • Performance Criteria Development
  • Ethylene Propylene Diene Monomer (EPDM)
  • Fluid Applied
  • Built Up Roofing (BUR)

Electronic Leak Detection (ELD) Testing

Electronic Leak Detection (ELD) is a state of the art technology that is revolutionizing the ability to detect leaks and provide quality assurance in the low-slope roofing and waterproofing industries. Both high voltage and low voltage methods are non-destructive and are performed by CDC for integrity testing or leak detection in roofing and waterproofing systems. High-voltage ELD is used on a dry membrane surface. A portable generator produces a small current with low amperages. The generator connects to a lead connected to the deck, and another lead that is attached to a copper bristle push broom. As the broom sweeps along the surface of the membrane, any breaches will complete the electric circuit and send a signal. Low-voltage ELD works by wetting the membrane and using a wire loop to create a conductive medium. Probes are then implemented to isolate the breach. Detecting leaks was previously dependent on either flood testing the membrane system, or using handheld tools to probe the leak area. Both methods are time-consuming and may not produce immediate results. Electronic Leak Detection delivers quicker, more accurate results in leak investigations. ELD testing incorporated into a green roof design can also allow for leak detection through soil overburden should a leak develop after the installation of a green roof..

Compatible Roofing Systems

  • Hot Fluid Applied (HFA) Rubberized Asphalt
  • Built Up Roofing (BUR)
  • Thermoplastic Polyolefin (TPO) Roofing
  • Polyvinyl Chloride (PVC) Roofing
  • Fluid Applied Roofing and Waterproofing
  • Cold Fluid Applied (CFA) Waterproofing