Hutchinson Design Group, Ltd. offers roof inspection, wall inspections, due diligence surveys, roof system design, masonry restoration, contract document preparation, construction observation, peer review, project management, expert witness and general building envelope consulting services. Hutchinson Design Group, Ltd. offers roof inspection, wall inspections, due diligence surveys, roof system design, masonry restoration, contract document preparation, construction observation, peer review, project management, expert witness and general building envelope consulting services.