Taken from:
http://www.peabuilders.com/sips-stru...ted-panels-faq
Q: Are insect infestations from ants and termites a problem with SIPs?
A: Unfortunately, termites and ants can infiltrate SIPs. Although they are no more likely to infest a SIP home than they are a traditional stick-framed home (especially since insects do not eat the foam for food), pests have been known to tunnel out foam and nest inside panels. Preventative treatments (such as borate-treated foams, topical sprays, and physical barriers) are available to deter infestation.
So far as SIP panels go if they are installed correctly - correctly being the key word - you're no better or worse off far as potential infestation. Fixing an area that does get compromised may be a heck of a challenge with SIPS seeing the way these things are put together.