A major concern when adding a room addition to your home is the weather. This is even more true when adding a second story to your home. Weather becomes a major concern when you have to remove your existing roof to add a new second story floor system, new exterior walls, new roof trusses and then your new roof itself. A lot of precautions and pre-planning has to occur to make this happen without any mishaps. A surprise rain storm could cause an insurmountable amount of damage to your home unless the necessary precautions were made in preparation.