To limit the probability of openings at joints between the foundation wall and the sill plate, between the sill plate and rim joist, between the rim joist and the subfloor material and between the subfloor material and the bottom plate of the wall above, which could lead to a loss of airtightness, which could lead to excessive air infiltration and exfiltration through the building envelope, which could lead to excessive heat loss or gain, drafts or high indoor relative humidity, which could lead to the excessive use of energy for heating and cooling, which could lead to an unacceptable effect on the environment.