A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
Uneven floors in new house.
Many older homes have problems with sloping and sagging floors.
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.
Uneven floors are typical in old houses.
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.
Cracks uneven floors and doors that don t fit correctly are signs of poor workmanship and need correction.
A floor that sags towards the center of the 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.
Mold and or rot in your crawl space.
Sloping floors are most often caused by normal and acceptable deflection bend in the wood joists which comprise the floor structure.
Uneven floors are rarely caused by problems with the floor itself.
Though a sloped floor might indeed bring some character to a house some of the issues that can cause them can lead to other problems down the road.
The cause is usually settling or shifting of the foundation underneath the floors.
However when looking at a brand new home i have a higher standard that i inspect to.