Should hardie board be caulked?
Score: 4.3/5 (34 votes) When James Hardie siding products butt into wood-based materials, a 1/8" gap will allow for expansion and contraction of the wood-based product. Caulks and Sealants: James Hardie recommends the use of caulks and sealants that remain permanently flexible.Do you caulk seams on ...