Roof Surveys


Exercise 7.1   Run the video below and use this FORM to record your notes.


Drone Surveys

EagleView for Measuring Roofs

Google Maps for Measuring Roofs 

Surveying using a mast camera 

Survey Review 


Exercise 7.2    How are Surveys carried out in your business, do you have standard forms or checklists that you use, what access methods are used?    Please prepare a brief report on how surveys are carried out, what works for your business.    UPLOAD HERE


Leak Testing


Leak detection can be used on a wide range of roof types and materials.


Detection Methods include

  • Thermal Imaging
  • Electronic Leak Detection
  • Pressurised smoke testing
  • Flood or Dye testing
  • Ultrasonic Leakage Analysis
  • Moisture Mapping
  • Electronic Resistance Testing.

We will consider these methods in the group learning session.

Core Sampling 

To carry out an effective flat roof survey you will need to know:  

  • What is it made of?
  • What condition is it in?
  • How many layers are stacked up on top of each other? 
  • Has it been well maintained?

To answer these questions we can take a core sample.  

The sample is taken with a special tool which makes a hole through the layers of the roof.

The “core” can then be pushed out of the pipe and its component parts examined.

The round hole is easily patched. etc.

Once the core sample is taken, it can be analyzed for the following information:

  • Layers – how many layers are in place?
  • Materials – what are the different layers made of and what are the weights of each layer?
  • Thickness – how thick is the current roof system?
  • Slope – is the slope on the roof in the insulation or in the roof decking?
  • HazMat – are there hazardous materials in the layers (like asbestos)?
  • Deck – what is supporting the roof system?
  • Water – is there water trapped in the roofing material?