Re: Square Rooms
I bought a house that was built in 1936 and has been remodeled a few times over the years. The main floor wasn't level or plumb. So I leveled it out. Now the upstairs isn't level or plumb.
Realize that houses settle over time. This is especially true for older houses, which often were built on soft soil without bearing on more solid soil such as rock or clay. Even for those houses built on firm soil, there can still be settling. Without driving piling to solid rock, there will be settling, and that solution is more expensive than most people are willing to pay. Prior to the invention of sheet goods (plywood, OSB, sheetrock) it was common for walls to rack (turn from rectangles to parallelograms) because they lacked shear strength, unless the builder installed proper diagonal bracing.
When remodeling, it's always best if you can first restore conditions to what they were the last time the structure was built or remodeled. That means you should probably make sure the floor is level and the walls are square before you install any new materials.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.