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Case Study: Crawl Space Access Door Installation & Closed-Cell Spray Foam Insulation in Queens, NY
An empty crawl space in need of an access door and insulation

Project Type: Crawl Space Access & Insulation
Location: Queens, NY
Service Area: Crawl Space (Approx. 128 sq.ft.)


Project Overview

At Zavza Seal, our team was called to a residential property in Queens, NY, where the homeowner needed a custom access solution for a sealed crawl space and a high-performance insulation upgrade. The project involved cutting into the foundation, ensuring structural integrity, and applying closed-cell spray foam insulation to an R-30 rating—ideal for energy efficiency, moisture control, and long-term durability.


Client’s Main Concern

  • The crawl space was completely inaccessible, making inspections and maintenance impossible.
  • The home suffered from cold floors, increased utility bills, and moisture buildup.
  • The client was looking for energy-efficient insulation that would last long and seal out external elements.

Zavza Seal’s Assessment

Upon inspection, our experienced crawl space specialists determined that:

  • The property lacked proper access to the crawl space (approx. 128 sq.ft.).
  • The absence of insulation contributed to heat loss, poor air quality, and potential moisture intrusion.
  • Installing closed-cell spray foam would offer the highest R-value and air/vapor sealing capabilities.

Our recommendation was a two-phase plan:

  1. Create a structurally sound crawl space access point.
  2. Fully insulate the crawl space using closed-cell polyurethane foam to R-30.

Scope of Work

Crawl Space Access Door Installation

Objective: Create a permanent, weather-resistant, and structurally sound access door for future inspections and maintenance.

Tasks:

  • Cut through the brick façade and foundation to create a crawl space entry point.
  • Install a steel channel above the cut to support the load-bearing structure, ensuring no damage to the foundation or façade.
  • Build a custom crawl space access door using pressure-treated lumber, weather-sealed and painted to the client’s preferred color for aesthetic consistency.
  • Ensure door fit is tight to prevent drafts, pest intrusion, and water infiltration.

Crawl Space Preparation and Insulation

Objective: Improve energy efficiency, block moisture, and increase home comfort with a durable insulation solution.

Tasks:

  • Clean and prepare the floor joists to ensure maximum adhesion for spray foam.
  • Apply closed-cell spray foam insulation to the crawl space walls and floor, reaching an R-30 thermal rating.
  • Use professional-grade spray equipment to ensure full coverage, seamless seals, and a long-lasting finish.

Why Closed-Cell Spray Foam?

  • Achieves R-6.5 to R-7 per inch — the highest R-value per inch in insulation
  • Creates a moisture barrier, helping prevent mold and mildew
  • Adds structural rigidity to the floor above
  • Great for air sealing and pest prevention
  • Does not sag, settle, or lose effectiveness over time

Project Results

After our work, the homeowner enjoyed the following benefits:

  • Safe and accessible crawl space with a durable, weather-resistant entry point
  • Noticeably warmer floors and reduced drafts in the living space above
  • Lower energy bills due to improved insulation and air sealing
  • Protection from future moisture buildup and mold risks
  • A fully sealed crawl space ready for long-term comfort and maintenance

empty crawl space

Why Homeowners in Queens Trust Zavza Seal

  • Over 15 years of insulation and waterproofing expertise
  • Specialists in crawl space and foundation access
  • Licensed & insured professionals
  • Customized solutions using top-tier materials
  • Serving Queens, Brooklyn, Long Island, and the Bronx

Don’t Neglect Your Crawl Space – Insulate It Today

Your crawl space plays a critical role in your home’s energy efficiency, comfort, and air quality. Whether you need access for repairs or want to upgrade your insulation, Zavza Seal is your go-to crawl space contractor in Queens, NY.


Services We Offer:

  • Crawl space access door installation
  • Closed-cell spray foam insulation
  • Crawl space sealing & waterproofing
  • Foundation access cutting & structural support

Get Your Free Crawl Space Estimate Today

Zavza Seal | Queens’ Trusted Crawl Space Contractor
Serving Queens, Brooklyn, Long Island & the Bronx
Call: (631) 980-1800
Visit: www.zavzaseal.com

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