I really don't know where to locate the opening for the crawl space. We inherited some problems with this house obviously! The inspector said that the siding was some kind of asbestos siding?? He said it works great....but it will be a mess and expensive to replace. So cutting into it to put a outside door access to the crawl space kind of scares me. Believe me I would LOVE to have a crawl space door in a different spot! I want different flooring in the bath...not the carpeting that is in there! Thanks for your advice Ron!!