For untreated wood siding, what is the minimum distance it must be kept above grade?

For untreated wood siding, what is the minimum distance it must be kept above grade?

• A. 12 inches
• B. 18 inches
• C. 6 inches
• D. 0 inches

Answer: (C)

Keeping untreated wood siding above grade is essential to prevent moisture damage and pest issues. The minimum distance required is six inches. This clearance helps stop moisture from wicking up into the wood and reduces the likelihood of rot and termite intrusion. If siding is treated for ground contact or designed for lower clearance, different rules may apply, but for untreated siding the six-inch gap is the standard minimum. The other options either imply ground contact or exceed the minimum without necessity.

Keeping untreated wood siding above grade is essential to prevent moisture damage and pest issues. The minimum distance required is six inches. This clearance helps stop moisture from wicking up into the wood and reduces the likelihood of rot and termite intrusion. If siding is treated for ground contact or designed for lower clearance, different rules may apply, but for untreated siding the six-inch gap is the standard minimum. The other options either imply ground contact or exceed the minimum without necessity.