Sampling - Step by Step
Roofing
Equipment
      The following equipment is required:
       1. Shaving Foam
       2. Knife
       3. Flathead Screwdriver
       4. Ziplock-type plastic sandwich bag
       5. Paper
       6. Pen
Sample Site Selection
       1. A sample can be collected from any location on the roof that appears to be a homologous part of the roof. If variations in the appearance of the roofing are present then each different area of the roof should be sampled.