Manufacturers'
Caulk and Sealant Recommendation Sheet S-100B
Issued July 2000
APPLICATION:
General: James Hardie believes it is good building practice
to seal the joints to prevent moisture, such as wind-driven rain
and snow, from penetrating the wall cavity. Caulking around
windows, doors, eaves and trim edges gives added insurance that
leaks will not occur. 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. Look for the words
‘permanent flexibility’ or ‘permanently flexible’ written
on the label or in the accompanying literature. Allowing caulks to
dry for the recommended time will help to prevent paint from
flashing and/or cracking over the caulked joint.
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Siding Caulking Tips
