Geofoam and Under-Slab Insulation
Our geofoam blocks and under-slab insulation boards are trusted by contractors, architects, and engineers across New Mexico
- Lightweight Fill
- Thermal Insulation
- Versatility
- Moisture & Mold Resistance
Build Smarter with EPS Geofoam & Under-Slab Insulation Solutions
Geofoam Sizing (thickness)
1 inch
1.5 inches
2 inches
Lightweight with High Strength
Moisture & Mold Resistant
Thermal Insulation
Environmentally Friendly
What is Geofoam & Under-Slab Insulation?
Geofoam is a lightweight, engineered fill material made from Expanded Polystyrene (EPS). It’s designed specifically for use in geotechnical and structural applications where traditional soil or aggregate would be too heavy or unstable.
- Lightweight with High Strength
- Faster, Easy Installation
- Reduces Structural Load & Settlement
Key Benefits of using Geofoam
Choosing the right roofing insulation is essential to building performance, long-term savings, and occupant comfort. At All Star Foam Inc., our high-quality EPS roofing insulation products are engineered to deliver efficiency, durability, and protection for both new builds and retrofits.
Superior Thermal Insulation
Under-slab insulation helps maintain consistent indoor temperatures by forming a thermal barrier between the foundation and the ground.
Wide Range of Applications
EPS foam products can be cut, shaped, and engineered to meet the needs of a variety of construction projects.
Moisture & Mold Resistant
The closed-cell structure of EPS resists water absorption, helping prevent mold, rot, and moisture damage.
The Perfect Solution Geofoam Applications
EPS geofoam is a versatile, lightweight fill material that solves a wide range of geotechnical and construction challenges. From stabilizing slopes and reducing structural load behind retaining walls, to creating elevated plaza decks and supporting stadium seating—geofoam delivers powerful results with reduced weight, faster installation, and lower costs.
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Retaining Walls
Used as backfill behind retaining walls to significantly reduce lateral earth pressures, thereby minimizing structural requirements and potential failures.
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Stadium Seating
Forms tiered seating in locations such as auditoriums, movie theaters, and gymnasiums, offering design flexibility and ease of installation.
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Road Construction Over Weak Soils
Geofoam acts as a lightweight alternative to traditional fill, making it ideal for building roads over soft or unstable ground. It helps prevent excessive settlement and speeds up construction timelines.
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Plaza & Rooftop Decking
Geofoam blocks are used to create elevation changes or level surfaces on plaza decks and rooftops without adding heavy loads, making them perfect for landscape design or pedestrian areas.
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Foundation & Under-Slab Fill
When used beneath foundations or slabs, geofoam helps reduce stress on underlying soils, making it a smart solution in areas with compressible ground or where soil movement is a concern.
Using geofoam from All Star Foam was a game-changer for one of our recent roadwork projects in Santa Fe. The soil conditions were challenging, and traditional fill would have added unnecessary weight and cost. All Star delivered high-quality EPS geofoam quickly, and their team worked closely with us to cut everything to spec.
Frequently asked questions
Geofoam is a lightweight, rigid EPS (Expanded Polystyrene) material used as a structural fill to reduce loads on soil and structures. It’s commonly used for retaining walls, road embankments, slope stabilization, and under-slab insulation.
Yes! Geofoam is available in various densities and compressive strengths. When engineered properly, it can support buildings, roads, and even bridge approaches while maintaining its shape and performance.
Geofoam is up to 100 times lighter than soil, reduces settlement, speeds up installation, and minimizes the need for heavy equipment. It’s also moisture-resistant and highly customizable for unique project needs.
Absolutely. Geofoam is commonly used as under-slab insulation due to its excellent compressive strength and thermal properties. It also resists mold and moisture, making it ideal for long-term below-grade use.
Yes! All Star Foam specializes in custom-cut geofoam, tailored to your exact dimensions and project requirements. Whether you need tapered blocks, cutouts, or large volumes, we’ve got you covered.
Lead times vary depending on project size, but most standard orders can be fulfilled same day. Custom orders may take slightly longer—contact us for a quote and timeline.
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Our team is here to help, please contact us with any questions, or to get a quote today.