# Sagging Floor Repair in Wilmington, NC > Floors that bounce or slope usually trace to a failed girder, a settled pier or rot at the band joist. We. What it costs, and when it is the wrong answer. URL: https://910crawlspacepros.com/services/sagging-floor-repair/ Home / Services / # Sagging Floor Repair Sagging Floor Repair What the work involves in Wilmington and the Cape Fear region, what it costs, and the situations where it is the wrong thing to buy. Last updated: 2 August 2026 ASTM E1745 reinforced liner • IRC R408.3 closed crawl space • Class I vapor retarder (<0.1 perm) • ICC-ES certified flood vents • Written scope before work starts 910 Crawl Space Pros provides sagging floor repair across Wilmington and the Cape Fear region. Sagging floor repair addresses floors that bounce, slope or feel soft underfoot by correcting what is happening below them — a failed girder, a settled pier, decayed joists, or inadequate support that was never right to begin with. ## What we do on the first visit Measure the actual deflection with a level across the affected area, then get underneath and find which member is not doing its job. The symptom upstairs rarely sits directly above the cause. ## Four causes, and they need different fixes Bounce without slope usually means joists that are undersized or over-spanned for the load — common in older homes and in rooms that were converted. The fix is additional support or sistering, not lifting. Slope toward one point usually means a settled pier or a failed footing under it. Slope along a line usually means a girder that has sagged or decayed. Soft, localised give usually means decay in the subfloor or the joist directly beneath. Bounce, no slope → span or joist capacity Slope to a point → settled pier or footing Slope along a line → girder failure Localised softness → decay in subfloor or a single joist ## Lifting is slow, and rushing it cracks the house A floor that has settled over twenty years cannot be lifted back in an afternoon. The structure above has adapted — plaster, drywall, tile and trim have all moved with it — and lifting fast simply transfers the movement into cracked finishes. Correct practice is incremental: a small adjustment, then time for the structure to relieve, then another. Depending on the amount of settlement that can mean weeks. Anyone offering to level your floor in one visit is telling you what will happen to your walls. ## Sometimes the right answer is support, not lifting Where the settlement is old, stable and not progressing, adding permanent support to stop further movement is often the better purchase than attempting to return the floor to level. It costs less, risks nothing upstairs, and addresses the actual problem — which is movement, not the absolute position. ## What's included Level survey establishing actual deflection, not an impression Identification of the specific failed member Adjustable steel jacks on poured footings sized to the load Sistered or replaced joists and girders where decayed Incremental lifting over an appropriate period where lifting is agreed Correction of the moisture source where decay is involved Written explanation of cause, not just the remedy Before and after level readings Price my sagging floors Free quotes within 24 hours. Free on-site assessment first. Website What do you need? Select a service… Crawl Space Encapsulation Crawl Space Insulation Crawl Space Waterproofing Crawl Space Mold Removal Crawl Space Vapor Barrier Installation Crawl Space Dehumidifier Installation Crawl Space Drainage Crawl Space Sump Pump Installation Crawl Space French Drain Crawl Space Cleanup Crawl Space Structural Repair Sagging Floor Repair Crawl Space Door Replacement Flood Vent Installation Not sure — I need someone to look ZIP code Continue Your name Phone What are you seeing? (optional) Back Request my inspection Got it — your request is in. We'll be in touch with a quote. Standards we work to ASTM E1745 — vapor retarder specification Class I vapor retarder, below 0.1 perms IRC R408.3 — unvented crawl space conditioning NC Residential Code crawl space requirements Other services Crawl Space Encapsulation Crawl Space Insulation Crawl Space Waterproofing All services → ## DIY, cheap quote, or done properly Most of the price difference between quotes is not labour — it is which of these steps the quote silently leaves out. DIY Cheapest quote Done properly Liner 6 mil builder sheet, laid loose 6–8 mil, taped seams, not fastened to walls Reinforced 12–20 mil to ASTM E1745, sealed to piers and walls Groundwater Not addressed Sealed over — water ends up under the plastic Drainage and sump first, liner second Humidity control None, or a household dehumidifier on an extension cord Undersized unit, condensate draining to the soil Unit sized to cubic footage, pumped to a proper discharge Vents Left open, or foam blocks pushed in Covered, not sealed Sealed and detailed so the space is genuinely closed Wood already affected Bleach from a spray bottle Surface treated, moisture source left in place Growth removed, framing treated, dried, then sealed What it costs $300 – $900 in materials $1,500 – $3,000 $4,200 – $14,000 How long it holds A season or two Often fails within a few years Liner life measured in decades when water is handled first ## How sagging floors work runs 01 Assess and measure Humidity, moisture content in the framing, standing water, clearance and access — photographed throughout. 02 Written scope Line by line, in the order the work has to happen, with a price against each component. 03 The work Water handled first where present, then the fix itself, then verification. 04 Verify and hand over Post-work readings recorded and left with you, along with the photographs. , not a heading: this is a CTA, not a section of the document outline. --> Get sagging floor repair priced for your home Free on-site assessment across Wilmington and New Hanover, Brunswick and Pender counties. Call (910) 886-2018 Get a free quote ## Sagging Floor Repair questions How much does sagging floor repair cost? A single support point on a new footing may be $800–$1,500. A failed girder line with multiple footings and sistered joists runs $4,000–$12,000. The level survey and probe are what produce a real number. Can a sagging floor be made perfectly level again? Rarely, and attempting it is often the wrong goal. A floor that settled over decades has finishes that moved with it. Incremental lifting can recover much of the deflection; chasing the last of it tends to crack plaster and tile. Is a bouncy floor dangerous? Usually not immediately — it is more often a stiffness problem than a strength one. Localised softness underfoot is the one to take seriously, because that suggests decay rather than deflection. Why did my floor start sagging? On the Cape Fear coast, most often sustained crawl space moisture that allowed decay in a girder or joist ends. The second most common cause is a pier footing that has settled in saturated soil. Related services Crawl Space Encapsulation A sealed liner across the floor, piers and walls, taped and mechanically fastened, with the vents closed and the space dried. It is the full system, not a sheet of plastic laid on dirt. Crawl Space Insulation Wall insulation for a sealed crawl space, or subfloor batts for a vented one. Which is correct depends on whether the space is closed — installing the wrong one traps moisture against wood. Crawl Space Waterproofing Stopping water getting in, before anything gets sealed. Grading, downspout extensions, perimeter drainage and a sump where the water table demands it.