In modern energy-efficient buildings, ground-level insulation is increasingly recognized as a crucial factor influencing thermal performance, indoor comfort, and overall energy consumption. This is especially true in regions with cold climates or large day-night temperature swings, where uninsulated ground slabs can become a major source of heat loss.
Why Under-Slab Insulation Matters
Studies show that up to 30% of a building’s heat loss can occur through the floor. Without insulation beneath the concrete slab, heat escapes to the ground or cold penetrates upward, leading to unstable indoor temperatures and increased heating or cooling demand.
By installing CCEWOOL® Rock Wool Insulation Board beneath the slab, builders can effectively eliminate thermal bridging and create a consistent, high-performance insulation layer that enhances energy efficiency and improves occupant comfort.
Key Benefits of CCEWOOL® Rock Wool Board for Sub-Slab Applications
Long-Lasting Thermal Performance：Low thermal conductivity helps maintain stable indoor temperatures by reducing heat gain or loss through the floor.
High Load Resistance and Structural Compatibility：Engineered for excellent compressive strength, the board can support the weight of the concrete slab and typical live loads, making it suitable for residential, commercial, and industrial buildings.
Superior Fire Resistance：Made from natural basalt rock, CCEWOOL® Rock Wool Board withstands temperatures up to 1000°C and meets Class A1 non-combustible standards—ensuring increased safety in foundation systems.
Vapor-Permeable and Moisture-Resistant：The board’s open-fiber structure allows vapor diffusion, preventing trapped moisture, condensation, and mold—ensuring long-term structural durability.
Dimensional Stability and Long Service Life：Resistant to environmental stress from humidity and temperature changes, the boards retain their shape and performance over time, requiring minimal maintenance.
Engineered for Excellence: Full Process Quality Control
CCEWOOL® Rock Wool Board is manufactured using advanced four-roll centrifugal technology and a fully automated production line. This ensures consistent quality at every stage:
High-Temperature Melting：Natural basalt rock is melted at 1500°C to form dense, uniform fibers with reliable thermal performance.
Fiber Mat Formation and Water-Repellent Coating：A precise water-based resin coating enhances moisture resistance and dimensional stability, making the board suitable for complex sub-grade conditions.
Precision Cutting and Density Control：Boards are cut to exact dimensions with consistent density and clean edges—ensuring fast installation, minimal material waste, and efficient on-site handling.
Ideal for New Construction and Renovation Projects
CCEWOOL® Rock Wool Board has been widely used in under-slab insulation systems across a variety of building types, including:
Subgrade insulation for new residential foundations
Floor insulation for commercial building slabs
Energy retrofit solutions for aging structures
It delivers safe, durable, and energy-efficient performance—making it an ideal choice for modern high-performance buildings.
Customer Testimonial
Guatemala Customer
Cooperation Years: 5 years
Ordered Product: CCEWOOL® Rock Wool Board
Product Size: 50 × 600 × 1200 mm
Since the start of our cooperation, CCEWOOL® has consistently delivered competitive pricing and reliable product quality. As of June 2025, we’ve procured the 50 × 600 × 1200 mm
Rock Wool Board multiple times each year. The product has proven effective in a wide range of residential and commercial building projects. From thermal efficiency and easy installation to dependable supply and service, CCEWOOL® has demonstrated its strength as a trusted partner in insulation materials.
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