Most modular homes are brought on site and put together, but the crawlspace gets neglected. Over time the conditions only get worse: Groundwater from the earth and plumbing leaks from above result in mold on surfaces of the belly pan, wooden structural elements, insulation, and the exposed earth or the dusty vapor barrier not properly sealed or damaged in traffic areas overtime - resulting in that musty crawlspace smell or Microbial Volatile Organic Compounds (MVOC's) - emitting into your home and leading to poor indoor air quality - ultimately affecting your health and well-being.
We were able to clean the belly pan & apply a white fungicidal coating. We added R10 2" foamboard to the walls, closed the vents (not needed for make up air for any combustible appliances), and closed cell spray foamed the air gaps. Then we installed our 20 mil cord reinforced vapor vapor barrier to the floor and walls to create a semi-conditioned space that should last the life of the home.
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