Do dormer windows require strapping under rough faced channel cedar siding?

Our house has rough faced channel cedar siding installed vertically on the exterior walls, with strapping placed over black fibrous boards underneath. There is a flat dormer window that protrudes from… Our house has rough faced channel cedar siding installed vertically on the exterior walls, with strapping placed over black fibrous boards underneath. There is a flat dormer window that protrudes from…Read MoreGreenBuildingAdvisor