Saturday, January 29, 2011

18" Clearance

California Building Code requires a minimum of 18" clearance between the bottom of floor joists and the finish grade inside of the footing stem walls. The photo below shows a situation where the builder didn't adhere to this requirement and the inspector didn't catch it. However, for some reason or another, the contractor also did not provide adequate ventilation for the sub-floor area. The takeaway is, if you do not provide adequate ventilation, (EVEN UNDER THE OCCUPIED SPACES!) problems will occur. Please do not cut corners. The bottom photo shows the growth and problems that can arise from an improper installation.

The result. The white and black are mold...