Nuclear Backscatter - Flat Roofs

Identify Roof Moisture Intrusion in Almost Any System

Nuclear Backscatter - Flat Roofs

What This Inspection Finds

Nuclear backscatter measures low-energy neutrons in roofing materials, which are detectable after colliding with hydrogen nuclei (thermalization). The more thermalized neutrons are measured, the greater the moisture detected.

Nuclear backscatter gauge diagram

Why It Matters

Nuclear backscatter testing can be used on nearly all roof types, except metal, and is required for ballasted roofs, double roofs, and systems containing lightweight insulating concrete, or when weather conditions are unfavorable for thermal inspections. It is also often used to verify findings when infrared thermography is the primary testing method.

How It Helps You Decide

Like infrared testing, nuclear backscatter provides detailed data on probable moisture intrusion issues within your roofing system. Combined with our grid-based mapping system, it gives a clear, comprehensive view of your roof's current condition.

Sample nuclear backscatter roof drawing

Inspection Methods

Troxler or Seaman Moisture Gauge
Grid-pattern surveying (Typically: 5x5 or 10x10)
Baseline calibration for each roof
Core sampling verification (approval required)

Common Questions

Insight Starts Here, Transforming Data into Direction

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