# Crawl Space Insulation Cost in Wilmington, NC (2026)

> What crawl space insulation costs in Wilmington, NC — subfloor batts vs wall board, per square foot, and why the wrong choice costs more later.

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# Crawl Space Insulation Cost in Wilmington, NC

Cost guide Crawl Space Insulation Cost in Wilmington, NC By material, by approach, and by what your crawl space actually is. Updated 2 August 2026 Crawl space insulation in the Wilmington area typically costs $1,500–$4,000, or roughly $1.50–$3.50 per square foot installed. Wall insulation in a sealed crawl space usually costs less than subfloor batts across the same footprint, because there is less area to cover.

## Cost by approach

The two approaches are not interchangeable, and they do not cost the same. Which one applies is decided by whether your crawl space is vented or sealed — not by budget. Subfloor batts, vented crawl space — $1.50–$2.50/sq ft of floor area Rigid board to perimeter walls, sealed crawl space — $1,200–$3,000 for a typical perimeter Rim and band joist air sealing — $400–$900, and the best value item on this list Removal and disposal of failed existing insulation — $400–$1,200

## Why removal is so often on the quote

Most Wilmington crawl spaces built before the 2000s have fiberglass batts stapled to the subfloor, and in this climate a large share of them have come down. Wet, fallen fiberglass has no remaining R-value and holds moisture against the framing, so it has to come out before anything goes in. If a quote for insulation does not mention removal and your crawl space has existing batts, ask what happens to them.

## The item that pays for itself fastest

Air sealing the rim and band joist is consistently the highest-value line on a crawl space insulation quote and the most commonly omitted. It is a small area, it takes a fraction of the labour of a full floor, and it addresses the single largest air leakage path between the crawl space and the living space above.

## The bottom line

Budget $1,500–$4,000, expect removal of failed batts to be part of it in most older Wilmington homes, and make sure the rim joist is included whatever else is. For a number against your own crawl space, use the cost estimator , or call (910) 886-2018 and we will come and measure it. Get an exact quote A free on-site measure beats any online range. 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. Related service Crawl Space Insulation Related guides Crawl Space Insulation vs Encapsulation Crawl Space Mold Removal Cost in Wilmington, NC Crawl Space Repair Cost in Wilmington, NC Crawl Space Waterproofing Cost in Wilmington, NC Crawl Space Encapsulation Cost Per Square Foot in Wilmington, NC All guides → , not a heading: this is a CTA, not a section of the document outline. --> Get your crawl space measured and priced Free on-site inspection across Wilmington and New Hanover, Brunswick and Pender counties. Free quotes within 24 hours. Call (910) 886-2018 Get a free quote

## Questions

Is crawl space insulation worth the cost? In a sealed crawl space, generally yes — it is the difference between a semi-conditioned space and one that pulls heat out of the floor above. In a vented crawl space the case is weaker, because the space stays at outdoor temperature regardless. Does crawl space insulation qualify for a tax credit? Insulation and air-sealing can fall under the federal 25C energy efficiency credit, unlike encapsulation on its own. Keep the invoice itemised so the insulation portion is separable, and confirm with a tax professional. Can I install crawl space insulation myself? Physically yes, but the failure modes are subtle — vapor facing on the wrong side, unsupported batts that fall within two years, and foam left uncovered against fire code. The material is cheap and the mistakes are expensive.