Up to 50% of the air you breathe upstairs comes from your crawl space. A damp, vented crawl breeds mold, attracts pests, and drives up your power bill. Full encapsulation seals it off — and it is one of the highest-ROI upgrades a Durham homeowner can make.
Common signs you need help
- Musty smells on the first floor or near floor vents
- Sagging floors or buckled hardwood
- High humidity in the home, especially in summer
- Visible moisture, standing water, or efflorescence on crawl walls
- Recurring pest problems despite treatment
How Castle Exterminators handles it
Clean-out & repair
We remove old vapor barrier, debris, and damaged insulation and address any drainage or grading issues.
20-mil reinforced vapor barrier
Heavy-duty white poly liner sealed to the walls and piers — overlapping seams taped, edges mechanically fastened. No gaps, no shortcuts.
Seal vents + dehumidifier
We seal foundation vents and install a crawl-rated dehumidifier so the space stays under 55% relative humidity year-round.
Frequently asked questions
How long does encapsulation take?
Most Durham crawl spaces are completed in 2–4 days depending on size and prep required.
What is the typical ROI?
Homeowners commonly see 15–25% lower heating and cooling bills, plus eliminated mold and pest issues. Resale value improvement is significant — appraisers recognize encapsulation as a structural upgrade.