I bought a 1824 house with water rotted first floor & around four windows. a structural company came in and did a great job of shoring up the floor and is coming next week to frame in new windows. I am getting estimates from from liquid siding company and a contractor who will use the jim.hardie products. any one had experience with either one? The framing for the roof is the original 2x4 and not today's 2x10s. Does anyone have a recommendation for insulating the inside of the roof which I am going to use as/with a cathedral ceiling? Thanks.