What should be done to the floors and walls during preparation?

Covering the floors and walls with poly is an essential step during preparation for asbestos abatement. This practice helps to contain any potential asbestos fibers and prevents them from spreading to other areas of the building. By using polyethylene sheeting, you create a barrier that protects underlying surfaces and minimizes contamination. The use of poly is crucial for ensuring a safe and controlled environment while the abatement work is being conducted.

In contrast, leaving floors and walls exposed could result in asbestos fibers becoming airborne, posing risks to both workers and occupants. Painting them a lighter color does not offer any protective function against asbestos contamination. Similarly, varnishing provides a superficial coat but does not adequately seal or protect the surfaces from asbestos release. Thus, covering with poly is the most effective and protective measure to take during the preparation phase.