My husband and I want to install 1" X 4" T&G beaded carsiding on the ceiling of our detached garage which seems to be a very solid structure and was built in the 1890's. We have taken off the garage doors and spanned a large header system across the front that anchors the side walls. There is a loft that has boards that rest on the top plate on three sides of the garage and nail into the rafters. We are putting V-groove carsiding on the walls which we are hoping will also add to the stability of the building. We removed the rotted shakes from the roof but left the board sheathing. We then put 1/2" plywood sheathing over the board sheathing and applied shingles. Our question is: Should we be concerned with the weight of the beadboard carsiding that we want to put on the ceiling? We certainly don't want the weight to splay the walls and have everything come crashing down. Everything "appears" tied together but we can't tell how much weight the building can withstand. Thanks!