Crawl Space Vapor Barrier Installation in Angier, NC
20-mil reinforced liner over bare Piedmont clay floors. Priced for Harnett County homes on Norfolk-Goldsboro Coastal Clay.
How much does crawl space vapor barrier installation cost in Angier, NC?
Crawl Space Vapor Barrier Installation in Angier, NC costs $3,800 to $8,400 for a typical home. A crawl space vapor barrier in the Triangle costs $1,800 to $4,200 and covers the dirt floor with a 20-mil reinforced polyethylene liner, seam-taped and mechanically fastened to foundation walls to block ground moisture from evaporating into floor joists.
Angier soil and why crawl spaces fail here
Norfolk and Goldsboro soils near Angier are coastal plain sediments with a moderately well drained surface over a slowly permeable clayey subsoil. Seasonal high water tables commonly sit between one and three feet below grade.
Shallow groundwater forces vapor straight through the thin 4-mil poly most builders installed, condensing on the underside and pooling in wrinkles. The plastic looks intact while the soil beneath stays permanently saturated.
Angier's commuter growth has produced a large stock of 2000s homes where upgrading from 4-mil poly to a sealed 20-mil system is the single highest-value fix.
Scope included in Angier
- 20-mil reinforced woven liner rated far above the builder-grade 6-mil poly used across Wake County subdivisions
- Seams double-taped and overlapped 12 inches, piers wrapped and sealed individually
- Termite inspection gap maintained per North Carolina building code
- Drainage matting added where Cecil clay perches water beneath the liner
Signs you need this
- Bare dirt or torn plastic under the house
- Musty odor rising into hallways and closets
- Condensation on ductwork in summer
Neighborhoods we cover in Angier
Other services in Angier
Vapor Barrier in nearby Triangle towns
See the full Angier crawl space guide or the Triangle-wide vapor barrier overview.
Vapor Barrier in Angier: common questions
Get a free crawl space inspection across the Triangle
Tell us your ZIP code and symptoms. We match you with licensed, insured local encapsulation contractors and you receive a written scope, not a sales pitch.