A soft spot by the tub, a dip in the middle of the living room or a kitchen floor that bounces when you walk across it usually means something has changed in the crawl space below. In older Oklahoma homes the cause is rarely a single bad board. It is usually a combination of crushed shims, piers that have settled into the clay, joists spanning too far between supports, or wood weakened by rot and termites.
Remodeling over the years plays a part too. Plumbers and HVAC installers have notched and cut many joists to run pipes and ducts, and heavy additions like stone countertops, cast iron tubs or a piano can push already marginal framing past its limit. Moisture from a damp crawl space softens wood over time, so floors over wet areas tend to sag first.
We start with a free inspection from under the house, taking floor readings and checking every joist, beam and support in the problem area. The written quote explains the cause and the repair, whether that is a few new posts or sistered joists and a new beam section. We serve all of Oklahoma from our shop at 7220 S Western Ave in Oklahoma City.
Oklahoma tip: check the bathroom and kitchen first
In older Oklahoma homes, the framing under bathrooms and kitchens takes the most abuse: plumbing notches, slow leaks and heavy fixtures. If one area of your floor feels soft, crawl under that room with a flashlight and look for dark, stained or crumbly wood and joists cut deep for drain lines.
Signs You Need Sagging Floor and Floor Joist Repair
- A dip or slope you can see or feel when walking
- Bouncy or springy spots in the floor
- Cracked floor tile or grout in one area
- Joists that are notched, cut or split in the crawl space
- Soft, dark or crumbling wood on joists or the sill
- Gaps opening between the floor and baseboards
Finding the Cause Before Choosing the Repair
Sagging floors come from a few common causes, and each one has its own fix. Crushed shims and settled piers are support problems, solved by reshimming, adding adjustable steel posts or setting new piers under the beam. Joists that span too far get a new support line, often a beam on posts, to shorten the span. Joists that have been notched, cracked or cut are usually sistered: a new full-length board is fastened alongside the old one so the pair carries the load.
Rot and termite damage need more care. Wood that is soft must be cut out or reinforced, and the cause, usually a plumbing leak or a damp crawl space, has to be fixed so the new wood stays sound. Rotted sill plates along the outside walls are replaced in sections. When several piers and beams are involved, the work overlaps with pier and beam foundation repair, and when the crawl space is damp we recommend moisture control so the repair lasts.
Sagging Floor and Floor Joist Repair Services We Help With
Joist sistering
New full-length lumber fastened alongside damaged or undersized joists.
Adjustable steel support posts
Posts added under beams and joists to shorten spans and lift low spots.
Supplemental beams
A new beam line on posts to cut long joist spans in half.
Beam section replacement
Damaged sections of girders removed and replaced with shoring in place.
Sill plate repair
Rotted sill plates at the perimeter cut out and replaced.
Subfloor patching
Soft or rotted subfloor sections opened up and replaced where needed.
Sagging Floor and Floor Joist Repair Cost in Oklahoma
| Project | Typical Range | What Affects It |
|---|---|---|
| Adjustable steel support post | $300 to $900 each | Height, footing, access |
| Sistering a floor joist | $300 to $900 each | Length, obstructions, access |
| Beam or girder section replacement | $2,500 to $8,000 | Length, load, shoring |
| Sill plate repair | $100 to $300 per linear ft | Extent of rot, wall access |
| Typical sagging floor and joist repair | $2,000 to $8,000 | Number of joists and supports involved |
How It Works
- 1
Inspection from below
We take floor readings and check joists, beams, posts, piers and sills under the sagging area.
- 2
Written repair plan
The quote names the cause and lists the posts, sistered joists or beam work needed.
- 3
Repair and gradual lift
Damaged framing is reinforced or replaced and low areas are raised slowly.
- 4
Final check
We recheck floor readings and walk the floor with you upstairs.
Pier and Beam Foundation Repair by City
Local details on soil, housing and common pier and beam repairs in each city we serve: