What type of materials suspected of containing asbestos should not be disturbed?

The correct answer is based on the significant risk posed by thermal wrap on heating pipes when it contains asbestos. Asbestos was commonly used in the past for its fire-resistant properties in insulation materials, including pipe wraps. If such a material is intact and undisturbed, it may not pose an immediate health risk; however, any disturbance can release asbestos fibers into the air, which is hazardous when inhaled.

While subflooring materials, wall paint, and roofing shingles may also contain asbestos, their potential for risk varies. Subflooring materials can pose a risk if they are broken or disturbed during renovations. Similarly, some wall paints may have historically contained asbestos but are less likely to be disturbed during normal usage. Roofing shingles containing asbestos can also pose risks, especially if they are damaged or removed.

The thermal wrap on heating pipes is particularly concerning because it is often in areas that may require maintenance or repairs, increasing the likelihood of accidental disturbance. Therefore, these materials should be carefully managed and left undisturbed unless handled by professionals trained in asbestos abatement and mitigation.