Rigid Insulation
Rigid insulation, also known as rigid foam board, is a high-performance insulation material designed to improve a building's thermal efficiency. Installed in walls, roofs, foundations, and other building assemblies, rigid insulation helps slow heat transfer, keeping interiors warmer in the winter and cooler in the summer.
Benefits of Rigid Insulation
- High R-value for efficient thermal performance
- Helps reduce energy costs
- Available for a wide range of residential and commercial applications
- Select products offer added moisture resistance
Wholesale Rigid Insulation for Your Next Project
From foundation walls to full commercial sheathing systems, F. V. Vleck Company stocks rigid insulation at wholesale pricing for contractors, distributors, and builders who need reliable supply without retail markup. Ordering wholesale gets you volume-based pricing that improves as your project scales, dependable inventory so board thickness and compressive-strength ratings are on hand when your schedule calls for them, and one point of contact for a complete insulation and barrier system instead of separate vendors for foam, facers, and flashing. Tell us your project's R-value targets, load requirements, and square footage, and we'll put together a wholesale quote.
Learn more about the brands we carry:
DuPont
DuPont has been a trusted name in building materials for decades, offering rigid insulation products that help improve energy efficiency and long-term building performance. No matter the project, DuPont's foam board insulation delivers reliable, durable products designed for straightforward installation — backed by warranties up to 50 years on XPS insulation.
Thermax™ Sheathing
DuPont™ Thermax™ Sheathing combines dependable insulation and moisture management into a single rigid wall sheathing solution. Its glass-fiber-infused foam core provides thermal performance, fire resistance, and dimensional stability, while reflective aluminum facers help keep water and water vapor out of the wall assembly.
Key Features:
- High, long-term thermal resistance
- Helps reduce moisture condensation within and behind the insulation
- Lightweight and easy to cut, handle, and install
- Can eliminate the need for a separate membrane or building wrap in some applications
- UV-stable technology allows the product to remain uncovered for up to six months
- Available in R-values from approximately R-3.3 to R-24 depending on thickness
- Available in 4' × 8' and 4' × 12' boards
- Class A fire rating (ASTM E84)
Styrofoam™ Brand Scoreboard™ XPS Foam Insulation
DuPont™ Styrofoam™ Brand Scoreboard™ XPS Foam Insulation is an extruded polystyrene (XPS) foam board designed for exterior cavity wall and foundation applications. Its scored surface makes it easy to cut to common jobsite sizes, while its resistance to water and water vapor helps maintain consistent thermal performance over time.
Key Features:
- Excellent insulating characteristics with an R-value of 5.0 per inch
- High resistance to water and water vapor
- Exceptional compressive strength and long-term durability (25 psi)
- Scored at 16" and 24" centers for easy sizing and installation
- Available in thicknesses from ¾" to 3"
- Available in 4' × 8' boards
- Meets ASTM C578, Type IV requirements for rigid cellular polystyrene thermal insulation
Styrofoam™ Brand Highload™ Insulation (40, 60 & 100)
For projects that need more than standard-duty foam, DuPont's Highload Styrofoam line steps up compressive strength while keeping the same low water absorption and Class A surface-burning characteristics as the rest of the Styrofoam family.
- Highload™ 40 – 40 psi compressive strength, suited for below-grade and moderate-load applications.
- Highload™ 60 – 60 psi compressive strength, suited for higher-load foundation, plaza deck, and paver applications.
- Highload™ 100 – 100 psi compressive strength, built for the most demanding structural loading conditions, including parking structures and roadways.
DuPont™ Commercial Wall Systems
Rather than insulation alone, DuPont packages complete wall assemblies — pairing Styrofoam XPS or Thermax polyiso insulation with DuPont's air and water barrier technologies (Tyvek®, LiquidArmor™, ArmorWall Plus™) into single-source, tested systems. This reduces compatibility risk between insulation and barrier components and simplifies specification for multilayer, 3-in-1, and 5-in-1 fire-rated wall assemblies.
Rigid insulation, also known as rigid foam board, is a high-performance insulation material designed to improve a building's thermal efficiency. Installed in walls, roofs, foundations, and other building assemblies, rigid insulation helps slow heat transfer, keeping interiors warmer in the winter and cooler in the summer.
Benefits of Rigid Insulation
- High R-value for efficient thermal performance
- Helps reduce energy costs
- Available for a wide range of residential and commercial applications
- Select products offer added moisture resistance
Learn more about the brands we carry:
DuPont
DuPont has been a trusted name in building materials for decades, offering rigid insulation products that help improve energy efficiency and long-term building performance. No matter the project, DuPont's foam board insulation delivers reliable, durable products designed for straightforward installation.
Thermax™ Sheathing
DuPont™ Thermax™ Sheathing combines dependable insulation and moisture management into a single rigid wall sheathing solution. Its glass-fiber-infused foam core provides thermal performance, fire resistance, and dimensional stability, while reflective aluminum facers help keep water and water vapor out of the wall assembly.
Key Features
- High, long-term thermal resistance
- Helps reduce moisture condensation within and behind the insulation
- Lightweight and easy to cut, handle, and install
- Can eliminate the need for a separate membrane or building wrap in some applications
- UV-stable technology allows the product to remain uncovered for up to six months
- Available in R-values from approximately R-3.3 to R-24 depending on thickness
- Available in 4' × 8' and 4' × 12' boards
Styrofoam™ Brand Scoreboard™ XPS Foam Insulation
DuPont™ Styrofoam™ Brand Scoreboard™ XPS Foam Insulation is an extruded polystyrene (XPS) foam board designed for exterior cavity wall and foundation applications. Its scored surface makes it easy to cut to common jobsite sizes, while its resistance to water and water vapor helps maintain consistent thermal performance over time.
Key Features
- Excellent insulating characteristics with an R-value of 5.0 per inch
- High resistance to water and water vapor
- Exceptional compressive strength and long-term durability
- Scored at 16" and 24" centers for easy sizing and installation
- Available in thicknesses from ¾" to 3"
- Available in 4' × 8' boards
- Meets ASTM C578, Type IV requirements for rigid cellular polystyrene thermal insulation