HouseWorks: Anchoring a shade sail

Q How can I find where wood is located behind aluminum siding so I can screw an anchor into it? My goal is to install a shade sail extending from the exterior wall of my house to the outer edge of a deck. Shade sails are large pieces of cloth meant to offer protection from sun and rain, and they need to be anchored securely against wind pressure. The house was built in 1959 and the aluminum siding was added over the original wood siding. Read More