I'm making addition to my current block on slab home from sometime in the 60s. I love this house: is like a fortress, and I get no rodents or bugs.I want to ask them to use the same.

= Does anyone suggest a different material? I feel like the last time I was here I learned a new promising idea, another material maybe.
= Do you think I will encounter resistance, greater cost, too much unfamiliarity?
= Other thoughts?