What method is recommended to avoid contamination during post-construction treatment?

The recommended method to avoid contamination during post-construction treatment involves pulling back carpet and sealing before each treatment. This approach allows for careful application of treatment materials while minimizing the risk of the chemicals spreading to unintended areas. It ensures that the treatment is focused and contained in areas where wood-destroying pests are likely to be present.

By sealing back the carpet, any potential overlaps or accidental spills are mitigated, thus protecting living spaces and any surfaces that should not come into contact with pesticides. This method is particularly important in residential settings where occupants may be sensitive to chemical exposure.

Other methods, such as using high pressure or treating all areas in one go, could lead to increased risk of overspray or runoff, which can contaminate non-target areas. Drilling multiple holes in rapid succession might also lead to larger openings that could facilitate greater diffusion of chemicals, resulting in a similar risk of contamination. Therefore, the careful approach of pulling back and sealing is the best practice for ensuring safety and efficacy in pest control treatments.