R-8.8 High Density 2" x 4' x 8' Expanded Polystyrene Foam Board Insulation (25 PSI)
Regular price $49.98R-8.8 High Density 2" x 4' x 8' Expanded Polystyrene Foam Board Insulation (25 PSI)
The R-8.8 High Density Expanded Polystyrene (EPS) Foam Board Insulation is a high-performance insulation solution designed for superior thermal resistance and durability. With a 2-inch thickness and a compressive strength of 25 PSI, this rigid foam board is ideal for insulating walls, floors, and roofs, ensuring maximum energy efficiency and long-term cost savings.
Unlike traditional insulation materials, this EPS foam board does not degrade or lose R-value when exposed to moisture, making it perfect for below-grade applications, under concrete slabs, and foundation walls. Lightweight and easy to cut, it provides a flexible installation process to meet the needs of various construction and insulation projects.
Designed for high-performance insulation, this foam board meets ASTM C578 standards, ensuring it maintains structural integrity and thermal efficiency over time. Whether used in residential, commercial, or industrial applications, this insulation board is a cost-effective and long-lasting solution.
Key Features
- Superior Thermal Resistance – R-8.8 insulation value ensures energy efficiency and reduced heating/cooling costs.
- Durable High-Density Foam – 25 PSI compressive strength makes it suitable for high-load applications, including under concrete slabs.
- Moisture Resistant – Unlike other insulation materials, it does not lose R-value when exposed to moisture or water.
- Versatile Application – Designed for below-grade foundation walls, under concrete slabs, exterior walls, and roofing systems.
- Easy to Work With – Lightweight and simple to cut, making installation quick and hassle-free.
- Environmentally Friendly – Formaldehyde-free material for better indoor air quality.
- Meets Industry Standards – Manufactured in compliance with ASTM C578 for quality assurance.
Specifications
| Attribute | Details |
|---|---|
| Product Type | Expanded Polystyrene (EPS) Insulation |
| Material | Expanded Polystyrene Foam |
| Overall Width | 4 feet |
| Overall Length | 8 feet |
| Thickness | 2 inches |
| R-Value | 8.8 |
| Compressive Strength | 25 PSI |
| Coverage Area | 32 square feet |
| Special Features | Formaldehyde-Free |
| Recommended Environment | Exterior, Below Grade |
| Application | Under Concrete Slabs, Foundation Walls, Roofing, Exterior Insulation |
| Listing Agency Standards | ASTM C578 |
| Moisture Resistance | Yes |
| Manufacturer | May vary |
| Shipping Dimensions | 96.00" H x 48.00" W x 2.00" D |
| Shipping Weight | 10.6875 lbs |
Frequently Asked Questions (FAQs)
Q: What is the R-value of this insulation?
A: This Expanded Polystyrene (EPS) Foam Board Insulation has an R-8.8 value, providing excellent thermal resistance.
Q: Can this insulation be used below grade?
A: Yes! It is specifically designed for below-grade applications, such as under concrete slabs and foundation walls.
Q: Does it lose its insulating value if exposed to moisture?
A: No. Unlike traditional insulation materials, EPS does not degrade or lose R-value when subjected to moisture, making it an excellent choice for damp environments.
Q: Can this foam board be used for roofing insulation?
A: Yes! It is commonly used in roof insulation systems due to its high compressive strength and durability.
Q: How do I cut this foam board for installation?
A: The foam board can be easily cut with a utility knife, saw, or hot wire cutter, allowing for custom fit installations.
Q: Is this insulation environmentally friendly?
A: Yes. It is formaldehyde-free, making it a safe and eco-friendly option for homes and buildings.
Q: Can I use this product in interior wall insulation?
A: While it is mainly designed for exterior and below-grade use, it can also be used in interior walls if properly installed with a fire-rated barrier.
Q: Is this insulation fire-resistant?
A: EPS insulation is combustible and should be used in accordance with local building codes and fire safety regulations. It may require a thermal barrier such as drywall when used indoors.
Q: How does this compare to extruded polystyrene (XPS) insulation?
A: EPS is more cost-effective and provides consistent R-value over time, whereas XPS has a slightly higher initial R-value but can degrade in performance due to moisture absorption.
Q: Does this foam board insulation meet ASTM standards?
A: Yes. It is manufactured in compliance with ASTM C578, ensuring quality, durability, and performance.
The R-8.8 High Density Expanded Polystyrene Foam Board Insulation is a top-tier choice for high-performance thermal insulation. Its high compressive strength (25 PSI) makes it a versatile solution for under concrete slabs, below-grade foundation walls, and roofing applications.
One of its biggest advantages is its moisture resistance—unlike traditional insulation materials, this EPS board does not lose R-value when exposed to damp conditions, ensuring long-term efficiency. Additionally, it is lightweight, easy to cut, and simple to install, making it ideal for both DIY projects and professional construction.
For homeowners and builders seeking cost-effective, durable, and reliable insulation, this foam board is an excellent investment. Whether insulating residential basements, commercial buildings, or industrial spaces, it offers consistent thermal performance and energy savings.
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