If you own an old or historic home and notice uneven or bouncy floors, you’re not alone. Uneven or sloping floors are one of the most common features found in historic and antique homes, especially those built before modern construction standards (pre-1900). The good news is it’s usually fixable once you understand what’s causing it.
The sill beam supports the entire house. When moisture gets in, the sill rots and floor joists lose support, causing floors to dip or pull away from the walls.
Learn more about the root of your home’s water damage by reading our blog on the “5 Ways to Prevent Water Damage from Weakening Your Home’s Foundation.”
Older builders used fewer or smaller joists. Add heavy modern loads (tile, appliances, & furniture), and the floors start to sag in the middle.
Stone or brick foundations shift over time from frost, moisture, or poor support, making floors slope toward one side of the house.
Learn more about settling foundations in our blog “How to Repair a Settling Foundation in Historic Homes: A Guide to Repair and Restoration.”
Powderpost beetles and termites can hollow out beams from the inside, weakening the structure without obvious signs.
Stacked bricks, wood shims, or old jack posts were “quick fixes” in the past, but they fail over time, and floors sink again.
High humidity slowly weakens wood joists and beams, especially in crawl spaces without vapor barriers.
Note: General contractors often “patch” the floor but ignore the structure. In historic homes, that only hides the problem, which is why you should call a structural restoration expert.
Sagging floors are a warning sign, not the main problem. The real issue is almost always structural and fixable with the right expertise.
At Colonial Restorations, we’ve been repairing sills, beams, and foundations in antique homes since 1981. We understand historic framing and fix the source, not just the surface. We’ll assess your home and present the best course of action for the longevity of your home.
Let’s take a look before it gets worse. Call Brad at 508-290-5298 and schedule a structural evaluation today.