In Washington State, wood to earth contact is a concern the inspector must call out, if he or she is a licensed structural pest inspector. The problem is that, over time, earth against wood will always lead to decay, infestation by wood destroying insects or both. Even pressure treated lumber will eventually decay over the years. I always recommend to people moving into homes that they make sure that there is clearance between their plants and the structure. I also suggest that they maintain several inches clearance between the wood and soil and grade the soil back so there is a slope away from the home.
Steven L. Smith
Bellingham WA Home Inspections
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