Crawl Space Encapsulation in Pierce & Kitsap County

WHY CRAWL SPACE ENCAPSULATION MATTERS

• 50% — of the air you breathe inside your home originates in the crawl space

• 80%+ — average humidity in unprotected PNW crawl spaces during rainy season

• 24–48 hrs — is all it takes for mold to form at high humidity levels

A vented crawl space in the Pacific Northwest is a liability. Kitsap and Pierce County's persistent marine
humidity means that outside air pulled into your crawl space carries enough moisture to fuel mold growth,
accelerate wood rot, and dramatically reduce your home's energy efficiency — year round.

WHAT'S INCLUDED IN OUR ENCAPSULATION SYSTEM

Step 01 — Full Debris & Moisture Removal

We start by removing all existing debris, old vapor barriers, and standing moisture. Any existing mold is
treated before encapsulation begins.

Step 02 — Drainage System Installation
We install a perimeter drainage system to route any future water infiltration away from the crawl space
before it can accumulate beneath your home.

Step 03 — Heavy-Duty Vapor Barrier
We install a reinforced vapor barrier across floors and up walls — commercial-grade
thickness that far exceeds the thin barriers used by residential-only companies.

Step 04 — Dehumidifier & Ventilation Setup
A commercial-grade dehumidifier maintains safe humidity levels year-round, with proper ventilation setup to
prevent air stagnation in the sealed space.

BENEFITS OF A FULLY ENCAPSULATED CRAWL SPACE

Lower Energy Bills
Sealing the crawl space eliminates the largest source of heat loss and cold air infiltration in most homes.
Homeowners typically see measurable reductions in heating costs within the first full winter after
encapsulation.

Healthier Indoor Air
Since up to 50% of your home's air comes from below, encapsulation directly improves the air quality you
and your family breathe every day — reducing allergens, mold spores, and VOCs from decay.

Protected Wood Structure
Moisture is the primary cause of wood rot in crawl spaces. Encapsulation removes the moisture that feeds
decay, protecting your floor joists, beams, and structural elements from long-term damage.

THE COMMERCIAL-GRADE ADVANTAGE

Most residential waterproofing companies use 6-mil to 12-mil vapor barriers — the minimum specified by
building code. NW Concrete Waterproofing installs a minimum 20-mil reinforced barrier as standard
practice, the same specification used in commercial building enclosures.

The difference isn't just thickness. Commercial-grade barriers feature:

• Reinforced cross-laminated core that resists puncture and tearing during and after installation
• Anti-microbial treatment that inhibits mold growth on the barrier surface itself
• Taped and sealed seams verified with commercial moisture meters before sign-off

• Full wall coverage up to the sill plate — not just floor coverage

SERVICE AREAS
Tacoma, Lakewood, Puyallup, Gig Harbor, Bonney Lake, Auburn, Federal Way, Kent, Renton, Bremerton,
Silverdale, Port Orchard, Belfair, Kingston

CRAWL SPACE ENCAPSULATION FAQS

Q: What is crawl space encapsulation?
A: Crawl space encapsulation is the process of sealing your crawl space from outside air and ground
moisture using a heavy-duty vapor barrier, drainage systems, and controlled ventilation or
dehumidification. It converts a vented crawl space into a sealed, conditioned space that maintains safe
humidity levels year-round.

Q: How much does crawl space encapsulation cost in Washington state?
A: Crawl space encapsulation in Washington State can vary depending
on the size of the crawl space, current conditions, and components installed. We provide a detailed
written estimate after a free assessment.

Q: How long does crawl space encapsulation last?
A: A properly installed commercial-grade encapsulation system can last 25+
years. Annual inspections help ensure the system continues performing optimally.

Q: Do I need crawl space encapsulation if I already have a vapor barrier?

A: A thin vapor barrier alone is not the same as full encapsulation. Thin barriers don't cover walls, don't
address drainage, don't manage humidity, and degrade over time. If your home has a basic vapor barrier
but you're experiencing moisture issues, a full encapsulation assessment is worthwhile.

Q: Will encapsulation help with my heating bill?
A: Yes — most homeowners see a measurable reduction in heating costs after crawl space
encapsulation. Cold, moist air rising from an unencapsulated crawl space is one of the largest sources of

Ready to Encapsulate Your Crawl Space?
Free assessment, written estimate, no obligation. Commercial-grade results for your home