my house was built in the 1890's and has 1 room which spans the entire width of the house at that end. Approx. dimensions are 12'7 X13'. This was an addition built onto the house over the years. my question is as follows- coming from the main body of the house entering the room the floor is level where the addition meets the original construction. however, there is a small grade as you proceed thru the length of the room to the end of the house. this grade appears to be about 1 - 2" overall. is it possible to utilize a liquid floor leveler which hardens, or, since i have to rip out the entire floor due to extensive water damage and relay new subflooring, is there a way to shim the sheets? I presume that over time, this section of the house has weighted down, due to poor gutter, no gutters and no quality footer around the base parameter. as it is built over a crawlspace whereas the main/original structure has a solid foundation/basement beneath it. I have considered utilizing jacks under the joists when i rip up the flooring, however i do not want to cause more structural damage. I would like to level the floor in such a way that i can lay tile. any suggestions? thanks!

We're having our old screen porch converted into a sunroom and also made larger. The existing porch had a nice cement foundation, very thick. For the add-on part they just put in three cement footings (or whatever they're called) and built it out of wood. There is no "bottom" to this floor. I asked if they were going to put a wood bottom on it to ENCLOSE it and they said, "No, wood will rot." (well, the whole THING is made from wood. Am I missing something here? Can't you buy pressure treated plywood? Maybe not???) He said the bottom would be styrofoam with the floor insulation on top of that and then covered with the plywood floor boards. So, my concern is we live in the country. We have a TON of pocket gophers and chipmunks - a TON. In fact, I've already seen them running into this area. We also have field mice everywhere (not in the house, but out in the lawn and garden shed, etc.) With only styrofoam between the ground and the insulation, wouldn't it be super easy for rodents to get into my FLOOR!?!?! Here is a pic of it right now: http://img26.photobucket.com/albums/v79/wijody/sunroom.jpg Any advice/thoughts/opinions welcome! Thanks!