We originally intended to use SureCav between our MBC timber frame and the local (Cotsworld-like) stone skin.  Anyway we were unhappy about the price and our builder was unhappy about the profile build-up, so we decided between us that we could manage keeping the cavities clean by other methods.  There are two alternatives that we considered, but ended up using a third which work well.  The first two alternatives were: To use internal slipformers. You can Google this and I found some dece