ISI Building Products

What ISI Building Products does

ISI Building Products is a privately held US manufacturer of vapor barriers, insulation, and building wrap products serving the North American construction industry. Founded in 1997 and headquartered in East Peoria, Illinois, the company operates manufacturing facilities throughout the Midwest and distributes through a nationwide network of representatives and dealers into the US, Canada, and Mexico. Its product portfolio is anchored by the Viper line of under-slab and crawl space vapor barriers, the Wraptor line of building wraps, and the Nu-Age Films engineered poly sheeting line, supported by insulation and accessory products such as Insul-Tarp, Space Age, Insul-Barrier, The Shoot, Bafflo, and Insullite.

ISI's core technology centers on proprietary multi-layer co-extrusion processes using virgin polyolefin resin, including a 7-layer EVOH barrier for soil gas and brownfield applications, cross-woven polyethylene films for tear and puncture performance, and patented product configurations such as The Shoot insulation baffle and Insul-Barrier. Products are specified to ASTM E1745 Class A, B, and C standards, carry ICC-ES code listings, and hold Clean Air GOLD low-VOC certification from Intertek, enabling contractor LEED and WELL Building Standard credit eligibility.

The company's revenue model is B2B sales of proprietary and private label building envelope products, executed through a hybrid channel mix: a nationwide distributor and dealer network for crawl space, vapor barrier, and wrap products, complemented by direct engagement for custom and private label manufacturing. Customer segments span residential and commercial construction, crawl space encapsulation contractors, and private label partners, with specification-side demand generation via 4specs.com, AEC Daily, RIB Speclink, Deltek Specpoint, and trade association memberships (NAHB, ACI, CSI, TCA, ICAA, SPFA, HPDC).

Name

ISI Building Products

Legal name

ISI Building Products

Website

https://isibp.com

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

11–50 employees

Short description

ISI Building Products is a private US manufacturer of vapor barriers, insulation, and building wrap products, distributing through a nationwide dealer network to residential and commercial construction customers across North America.

Ownership category

akta.pro rank

Product category

Building Envelope Materials

NAICS

Unlaminated Plastics Film and Sheet (except Packaging) Manufacturing (326113)

SIC

Unsupported Plastics Film & Sheet (3081)

akta.pro primary industry

Insulation & Air/Vapor Barrier Systems (Thermal, Acoustic, WRB/AVB) (IMAFAMAD)

akta.pro secondary industries

Vapor Retarders & Vapor Barrier Films (IMADAGAJ), Industrial & Protective Film Extrusion (Masking, Surface Protection, Barrier Films) (IMANACAD)

Keywords

• Vapor barrier products
• Building wrap materials
• Insulation products
• Crawl space encapsulation
• Under-slab barriers

Headquarters

HQ city

East Peoria

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Building Products Sales: B2B sales of vapor barriers, insulation, and building wrap products to construction industry customers including distributors, contractors, and builders throughout North America.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

ISI Building Products manufactures and distributes vapor barriers, insulation, and building wrap products for the construction industry. Its portfolio spans the Viper line of under-slab and crawl space vapor barriers (including proprietary multi-layer co-extruded and 7-layer EVOH products), the Wraptor line of breathable building wraps, and complementary insulation and accessories (Space Age reflective insulation, Insul-Tarp under-slab insulation, The Shoot and Bafflo baffles, and Insullite recessed light covers). The company also offers private label and custom manufacturing services for customer-specific labeling, color, sizes, and configurations.

Product overview

ISI Building Products is a building materials manufacturer offering a comprehensive portfolio of vapor barrier, insulation, and building wrap products for the construction industry. The product line centers around three core categories: (1) VAPOR BARRIER products including the Viper II Under-Slab, Viper II Platinum Residential, Viper Venom Gas & Vapor, Viper VaporCheck, Viper VaporScrim, and multiple Viper CS crawl space encapsulation solutions (CS, CS II, CSX), plus Insul-Barrier insulated vapor barrier and Nu-Age Films engineered poly sheeting; (2) INSULATION products including Insul-Tarp under-slab insulation, Space Age reflective foil insulation, and accessories like Insullite recessed light covers, The Shoot and Bafflo ventilation baffles; and (3) BUILDING WRAP products including Wraptor and Wraptor HP building wraps with complementary tapes. The company also offers private label/custom manufacturing services. All products are supported by technical documentation, warranties, and installation guides, with distribution throughout North America.

Differentiator

Problem solved

Functional benefit

Brands

• Viper: Product brand encompassing vapor barrier products including Viper II, Viper CS, Viper CS II, Viper CSX, Viper Venom, Viper VaporCheck, and Viper VaporScrim product lines
• Wraptor
• Insul-Tarp
• Insul-Barrier
• Space Age
• Nu-Age Films
• Insullite
• Bafflo
• The Shoot

Products and services

• Viper II Under-Slab Vapor Barrier Multi-layer co-extruded virgin polyolefin under-slab vapor barrier designed to prevent moisture and soil gas migration through concrete slabs; available in 6-mil to 20-mil thicknesses meeting ASTM E1745 Class A, B, and C requirements.
• Viper II Platinum Residential Vapor Barrier First residential under-slab vapor barrier to achieve ASTM E1745 Class A status for blown films under 10-mils thick; controls moisture, mold, radon, and methane gas migration.
• Viper Venom Gas & Vapor Barrier 20-mil commercial soil gas vapor barrier featuring 7-layer co-extrusion technology with EVOH layer for protection against radon, methane, hydrocarbons, and contaminated soil environments including brownfield sites.
• Viper VaporCheck Reinforced Vapor Barrier Cross-woven heavy-duty under-slab vapor barrier with enhanced puncture and tear strength; exceeds ASTM E1745 Class A requirements and is designed for commercial applications with heavy foot and equipment traffic.
• Viper VaporScrim Reinforced Poly Sheeting Multi-use polyethylene vapor retarder with high-strength string-weave reinforcing layer for construction, agriculture, and fumigation applications requiring vapor/dust control.
• Viper CS Crawl Space Vapor Barrier Cross-woven crawl space vapor barrier manufactured from premium virgin resin with no recycled content; offers tear strength, puncture resistance, and water vapor permeance for crawl space encapsulation.
• Viper CS II Crawl Space Vapor Barrier White co-extruded virgin polyolefin vapor barrier for crawl space moisture and soil gas control; available in 8-mil to 20-mil thicknesses with lifetime warranty.
• Viper CSX Radiant Crawl Space Vapor Barrier High-performance crawl space vapor barrier with bright white cross-woven skin laminated to a high-density flexible foam core; provides radon barrier protection, lifetime warranty, and Clean Air GOLD certification.
• Insul-Barrier Insulated Vapor Barrier Patented insulated vapor barrier for crawl spaces combining reflective technology with insulating layers for optimal thermal performance while preventing moisture migration.
• Insul-Tarp Under-Slab Insulation Cross-woven extrusion-coated polyethylene under-slab insulation with closed-cell foam and reflective technology creating a thermal break and vapor barrier between slab and soil.
• Nu-Age Films Engineered Poly Sheeting Premium plastic sheeting manufactured from prime grade virgin resin with zero recycled content; available in 4+, 6+, and 10+ formulations for construction, industrial, and agricultural applications.
• Space Age Reflective Insulation Rolled reflective foil insulation in FBBF and WBBF configurations; multi-purpose radiant barrier and moisture barrier for attics, crawl spaces, ductwork, post-frame construction, and RVs.
• Insullite Recessed Light Cover Fire retardant recessed light cover allowing safe insulation around recessed lights; ships flat with easy assembly and printed ruler for measuring insulation depth.
• The Shoot Insulation Baffle Patented insulation baffle for open framed areas in residential and commercial new construction; pre-scored to assist in alterations for odd sized openings; used in common wall, knee wall, and spray foam applications.
• Bafflo Ventilation Baffle Corrugated cardboard baffle enhancing attic ventilation and insulation efficiency; prevents batt blow-outs caused by wind and provides tight seal at top plate area; meets all energy code requirements for air infiltration.
• Wraptor Building Wrap Breathable cross-woven polypropylene building wrap preventing wall sheathing from absorbing moisture behind exterior cladding; semi-translucent design for stud location and tear-resistant structure.
• Wraptor HP Building Wrap High-performance breathable non-woven polypropylene building wrap optimized for air penetration resistance, water hold-out, UV protection, and permeance; semi-translucent design with UV stabilizer for extended exposure on residential, commercial, and post-frame applications.
• Private Label and Custom Manufacturing Custom manufacturing service offering customer-specific labeling, color, styles, sizes, and configurations for building products; available for branded and co-branded Wraptor HP and Wraptor Building Wrap products.

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Twelve partnerships are on record, tiered minor.

• 4specs-comminorGTM or Marketing PartnerConstruction-focused partner providing education and product awareness through their platform for building professionals.
• AEC DailyminorGTM or Marketing PartnerConstruction education partner providing online courses and continuing education for architects and design professionals.
• ACI American Concrete InstituteminorOthersTrade association partnership for concrete construction industry education and standards.
• CSI Construction Specifications InstituteminorOthersTrade association partnership for construction specification professionals.
• TCA Tilt-Up Concrete AssociationminorOthersTrade association partnership for tilt-up concrete construction industry.
• NAHB National Association of Home BuildersminorOthersTrade association partnership for residential builders and construction professionals.
• ICAA Insulation Contractors Association of AmericaminorOthersTrade association partnership for insulation contractors and professionals.
• SPFA Spray Polyurethane Foam AllianceminorOthersTrade association partnership for spray foam industry professionals.
• HPDC Health Product Declaration CollaborativeminorOthersPartnership for health product declaration standards and transparency in building materials.
• Red Feather DevelopmentminorOthersNonprofit partnership helping Indigenous communities develop and implement housing solutions. ISI supports through product donations or community giving.
• Sacks to MatsminorOthersSocial impact partnership using recycled plastic bags and Nu-Age Films to create sleeping mats distributed to people experiencing homelessness.
• Habitat for HumanityminorOthersNonprofit partnership helping families build and improve places to call home. ISI supports through product donations or community involvement.

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Stego Industries: Stego Industries is a leading North American manufacturer of vapor retarders and barriers (Stego Wrap) used under concrete slabs. Directly comparable to ISI's Viper II line on product category, ASTM E1745 compliance, and distribution through building envelope channels.
• Cosella-Dörken (DELTA): Cosella-Dörken manufactures DELTA-brand air, vapor and weather barriers, drainage membranes, and building wraps for North American construction. Closely comparable to ISI's Wraptor building wrap and full building envelope focus, with overlapping architect/specifier channels.
• Polyguard Products: Polyguard manufactures below-grade waterproofing, air barriers, and vapor retarders for commercial and residential construction. Comparable to ISI on building envelope category, with shared distribution through distributors and overlapping specification activity.
• Reef Industries (Griffolyn): Reef Industries produces reinforced polyethylene sheeting and vapor retarders (Griffolyn) used in construction and industrial applications. Comparable to ISI's Nu-Age Films and reinforced vapor barrier products on cross-woven polyethylene technology and channel.
• W. R. Meadows: W. R. Meadows manufactures building envelope products including vapor retarders, waterproofing membranes, and concrete construction chemicals. Comparable to ISI on vapor barrier and below-slab product category with broader portfolio overlap.

Broad incumbents

• Henry Company (Carlisle Construction Materials): Henry Company, now part of Carlisle, is a broad building envelope manufacturer offering air barriers, waterproofing, vapor retarders, and roofing systems. Comparable to ISI as a larger incumbent player in overlapping building envelope categories with greater scale and portfolio breadth.
• Kingspan Group: Kingspan is a global building envelope and insulation manufacturer with rigid insulation, vapor control layers, and building wraps (Kingspan Insulated Panels, Kingspan Optim-R). Comparable as a large incumbent in the broader insulation and vapor control category where ISI operates.

Regional players

• Epro Services: Epro Services specializes in below-grade waterproofing, vapor barriers, and methane/radon mitigation systems primarily in North America. Comparable to ISI's Viper Venom line on soil gas barrier technology and brownfield remediation applications.

Emerging players

• Prega International: Prega manufactures vapor barriers and concrete underlay products for residential and commercial construction. Comparable as a smaller direct competitor to ISI in the same vapor retarder category with overlapping product positioning.

Others

• Sealed Air Corporation: Sealed Air produces protective films, bubble insulation, and packaging materials using polymer extrusion technology relevant to ISI's Space Age reflective insulation and film-based product lines. Adjacent rather than directly competitive.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/isi_bp
• Facebookfacebook.com/isibuildingproducts

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ISI Building Products