The cause is usually settling or shifting of the foundation underneath the floors.
Uneven floors in new house.
Uneven floors are typical in old houses.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
Sloped floors are common in older homes and even in homes as new as 15 to 30 years.
Sloping floors are most often caused by normal and acceptable deflection bend in the wood joists which comprise the floor structure.
However when looking at a brand new home i have a higher standard that i inspect to.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
If you re a home buyer seeking that perfect historic or old house uneven floors are something you ll have to deal with sooner or later and even if a home was recently built as it gets older the floors will become less level while you own it.
Uneven floors are rarely caused by problems with the floor itself.
Mold and or rot in your crawl space.
Cracks uneven floors and doors that don t fit correctly are signs of poor workmanship and need correction.
In a lot of cases the owners of these homes simply ignore the problem or pass it off as a normal part of having a classic house.
When i am inspecting pre owned homes small cracks in walls uneven floors and doors that don t fit perfectly are all part of what i call character.
Many older homes have problems with sloping and sagging floors.