Floor Joist Repair in Montgomery, AL

Floor joists are the wooden beams that support your floors in pier‑and‑beam homes. In

Montgomery, Alabama, moisture, termites, and age can cause joists to rot, sag, or crack. Floor

joist repair restores structural integrity and prevents floor collapse.

Signs of Floor Joist Problems

You may notice floors that feel bouncy or spongy when you walk. Sagging or uneven floors,

especially in the center of the room. Cracks in drywall above the floor. Visible rot or water

damage if you can access the crawl space. Termite damage (hollow‑sounding wood, mud

tubes). A musty odor in the crawl space. If you see any of these, schedule an inspection.

Montgomery Foundation Repair Co has extensive experience diagnosing and repairing floor

joists in Montgomery’s older and newer homes.

Common Causes of Joist Damage

The leading cause of floor joist damage in Montgomery is moisture. High humidity in crawl

spaces (often over 70%) promotes wood rot. Floor joists in contact with damp soil or concrete

can decay from the bottom up. Termites are attracted to moist wood and can hollow out joists

from the inside. Overloading (adding heavy furniture or appliances) can cause sagging. And

poor original construction—undersized joists or inadequate bridging—can lead to excess

deflection. Montgomery Foundation Repair Co addresses the root cause (moisture) as part of

any joist repair.

Repair Methods for Damaged Joists

For minor rot or cracks, we can “sister” a new joist alongside the old one, bolting them

together. The new joist carries the load while the old one remains in place. For severe rot, we

may need to remove a section of the old joist and replace it with new lumber supported on

both ends. Sagging joists can be jacked up level and then supported with a new beam or

adjustable steel posts. For termite damage, we treat the infestation, then replace the damaged

wood. Montgomery Foundation Repair Co uses pressure‑treated lumber for all replacements to

resist future rot.

Preventing Future Joist Damage

After repairing joists, we recommend crawl space encapsulation to control moisture. A vapor

barrier, sealed vents, and a dehumidifier keep humidity below 55%, preventing rot. We also

recommend annual crawl space inspections to check for termites or new moisture issues.

Proper grading and gutters keep water from entering the crawl space. With these measures,

your repaired joists will last for decades.

Frequently Asked Questions