Bergen County, NJ · Veteran-Owned

Closed Cell Spray Foam Insulation in Old Tappan, NJ

Professional closed cell spray foam insulation for general contractors and developers in Old Tappan and across Bergen County. Certified crews. Commercial-grade materials. On your schedule.

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Walls & Ceilings Top 25 Contractor Certified Applicators NJ Energy Code Compliant

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Old Tappan & Bergen County

The Highest-Performance Insulation System Available

Closed cell spray foam delivers an R-value of up to R-6.5 per inch — the highest of any commercially available insulation product. Its dense, rigid structure functions simultaneously as a thermal barrier, a Class II vapor retarder, and a structural reinforcement layer.

For GCs and developers working in Old Tappan, closed cell spray foam is often the only product that satisfies thermal, moisture, and code requirements in a single application — critical on tight schedules and high-performance projects.

JB Insulation & Drywall is a certified spray foam applicator based in Oakland, NJ. We work directly with general contractors and developers — no homeowner calls, no retail jobs.

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R-6.5

R-value per inch — highest available

2-in-1

Insulation + vapor barrier in one pass

Class II

Vapor retarder — no separate product needed

Insulation services for any GC scope

What Closed Cell Spray Foam Delivers

Every benefit that matters on a GC or developer project — performance, compliance, schedule, and long-term durability.

Highest R-Value Per Inch

Up to R-6.5 per inch means thinner assemblies that meet or exceed NJ energy code in less space — critical for tight wall cavities and low-slope roofs.

Class II Vapor Retarder

No separate vapor barrier required. Closed cell foam satisfies NJ IECC vapor retarder requirements for climate zone 4A assemblies in a single product.

Structural Reinforcement

The rigid closed cell matrix measurably increases wall racking resistance and roof deck adhesion on any commercial build in Bergen County.

Moisture & Mold Resistance

Closed cell foam does not absorb water — the preferred specification for crawl spaces, below-grade walls, and rim joists in NJ construction.

Unvented Roof Assembly Compliant

Approved for use in unvented (hot roof) assemblies per NJ building code when applied at the required minimum thickness.

Air Sealing Included

Seals all penetrations and irregular gaps in the same application — eliminating the need for a separate air barrier product and reducing field labor.

Common Applications in Old Tappan & Bergen County

Rim JoistsCrawl SpacesUnvented Roof DecksBelow-Grade WallsCommercial EnvelopesMultifamily Party WallsMetal Building InteriorsCold Storage

The Sub GCs in Bergen County Call First

JB Insulation & Drywall is a B2B insulation and drywall subcontractor. Our clients are general contractors, developers, and project managers. Here's why they keep coming back.

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Veteran-Owned & OperatedAccountability, professionalism, and zero excuses on every job site.
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Walls & Ceilings Top 25 Insulation ContractorNationally recognized among the top insulation contractors in the country.
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NJ Energy Code CurrentWe stay current on 2021 IECC requirements so your project closes out clean.
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Scaled for Developer & GC VolumesCrew depth and scheduling discipline for large multifamily and commercial projects.
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Full-Scope Sub — Insulation + DrywallOne sub for both scopes means fewer handoffs and fewer schedule conflicts.

JB Insulation & Drywall — At a Glance

Base:56 Spruce St, Oakland, NJ 07436

Service Area:Bergen, Passaic & Morris Counties, NJ; Hudson Valley, NY

Services:Open & Closed Cell Spray Foam, Fiberglass, Blown Cellulose, Drywall, Firestopping, Coatings

Recognition:Walls & Ceilings Top 25 Insulation Contractors

Ownership:Veteran-Owned Business

Clients:General Contractors, Developers, Project Managers — B2B only

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Frequently Asked Questions

Answers to what GCs and developers ask most about closed cell spray foam in New Jersey.

What is closed cell spray foam insulation?

Closed cell spray foam is a rigid, high-density insulation product with a fully closed cell structure that traps a blowing agent inside each cell. This gives it an R-value of up to 6.5 per inch — the highest of any insulation type — and makes it function as both a thermal barrier and a Class II vapor retarder. It also adds measurable structural rigidity to the assembly it is applied to.

When does NJ building code require closed cell spray foam?

New Jersey follows the IECC energy code, which mandates vapor retarder requirements for certain climate zone assemblies. Closed cell spray foam satisfies these requirements without a separate vapor retarder product. It is also required or strongly specified for unvented roof assemblies, below-grade walls, crawl spaces, and rim joists in high-performance construction across Bergen County.

How does closed cell compare to open cell spray foam?

Closed cell delivers a higher R-value per inch (up to R-6.5 vs. approximately R-3.8 for open cell), acts as a vapor barrier, and adds structural strength. Open cell is lower density, more cost-effective per board foot, and provides superior sound attenuation. The right choice depends on the specific assembly, climate zone requirements, and project budget.

Does JB handle large commercial closed cell projects in Bergen County?

Yes. JB Insulation & Drywall is a commercial-focused insulation subcontractor. Our certified crews are scaled for developer and GC timelines on multifamily, commercial new construction, and large renovation projects across Bergen County, including Old Tappan. Call (201) 485-8990 or visit jb-insulation.com/contact.

What R-value do NJ walls require in Bergen County?

Under New Jersey's adopted energy code (2021 IECC), above-grade wall assemblies in Bergen County typically require a minimum of R-20 continuous insulation or R-13 cavity plus R-5 continuous. Closed cell spray foam applied to the appropriate thickness can meet or exceed these requirements in a single application.