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How to Find Asbestos Insulation Inside Walls (for Building Demolition)Joseph BurleyFreelance Enviro-Tech/Tri-TechMichigan ...
How to Find Asbestos Inside Walls
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How to Find Asbestos Inside Walls

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Transcript of "How to Find Asbestos Inside Walls"

  1. 1. How to Find Asbestos Insulation Inside Walls (for Building Demolition)Joseph BurleyFreelance Enviro-Tech/Tri-TechMichigan Asbestos Building Inspector #A13808Recently during a pre-demo survey of a house the builder client expressed amazement athow easily I found the asbestos hidden inside the walls. I have never seen the methoddescribed and always figured it was fairly obvious. However, if a builder didnt knowhow it was done, I figured it was worth reviewing for those still learning the asbestossurvey business. This works for both hot-water and supply insulated pipe and ductinsulation. This example is based on a typical 2-story house with the basement but thebasic concepts can be applied to other house configurations or commercial buildings.1. Draw a relatively to-scale plan of the house starting with an enlarged aerial and/orassessors shell plan to get the basic dimensions. Use outside window positions as a cuefor the room configurations. Map out each air duct or radiator in each room as well aswater supplies (sinks/shower/toilets). Check the supply water areas first for pipe hatchesor whether the piping goes straight down. Determine if the domestic is insulated--typically it isnt for residential in my area, otherwise it needs to be accounted for usingthe same method as for the heating system.2. In the basement, map out where the risers enter the ceiling and match them up with theradiators above. Two lines for each radiator. With ducts typically only the supply isinsulated but double check the returns anyways. Look for evidence of duct insulationremoval on bare ducts--sometimes its been removed from the basement facing but leftaround the duct above the ceiling behind the register. Once the first floor risers areaccounted for, look at the remaining risers. Typically they are right below thecorresponding radiators/ducts on the second floor.3. Connect the dots and project where on the first floor the risers should be hidden. Put onyour respirator, take careful aim with a sledgehammer and let it fly-- but not too hard--you may not know the asbestos content of the plaster or drywall and you dont want tocrush the asbestos behind it. Hopefully, as shown below you find it on the first shot. Good luck and happy hunting!http://commonground.edrnet.com/posts/8d1d7f98cc

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