Under Slab Insulation | Insulation Underslab

Looking for an insulation solution that combines sustainability, performance, and breathability? Wood fiber insulation is the smart choice for eco-conscious homeowners, builders, and architects. At Insulation4US, we offer a curated range of high-quality wood fiber insulation products designed to deliver thermal efficiency, sound control, and environmental responsibility in one natural package. Whether you're insulating walls, roofs, or floors, our wood fiber insulation options are built to last and are easy to install.

What is Wood Fiber Insulation?

Wood fiber insulation is a natural building material made by compressing wood fibers — often reclaimed from sawmill residue — into dense, insulating boards or batts. These fibers are treated and formed using minimal synthetic binders, preserving the breathable and moisture-regulating properties of wood. With excellent insulation values and environmental credentials, wood fiber is ideal for use in sustainable construction and renovation projects.

Our Under Slab Insulation Products

At Insulation4US, we offer a curated selection of under slab insulation products designed to meet various construction needs:

1. Owens Corning FOAMULAR® XPS Insulation

Extruded polystyrene (XPS) foam board is known for its high compressive strength and moisture resistance.

Benefits:

• Excellent thermal performance with R-values up to R-10.
• Resistant to water absorption, maintaining insulating properties over time.

• Ideal for below-grade applications and under concrete slabs.

   

2. Rmax Thermasheath® Polyiso Insulation

Polyisocyanurate (polyiso) foam board offering high R-values in a thin profile.

Benefits:

• High thermal resistance, providing R-6 per inch.
• Lightweight and easy to install.

• Suitable for various applications, including under slab insulation.

   

3. EcoFoil Ultra CBF Under Slab Insulation

Reflective bubble insulation is designed specifically for under concrete slabs.

Benefits:

• Combines a vapor barrier and radiant barrier in one product.
• Reflects up to 97% of radiant heat, enhancing energy efficiency.

• Easy to install with minimal tools required.

   

Why Choose Under Slab Insulation?

Under slabs insulation is a critical component in modern construction, offering numerous benefits that contribute to a building's longevity, energy efficiency, and indoor comfort. By installing insulation beneath concrete slabs, you can:

• Improve Energy Efficiency: Reduce heat loss through the floor, leading to lower energy bills and a more comfortable indoor environment.
• Control Moisture and Mold: Act as a barrier against ground moisture, preventing condensation and mold growth within the building.
• Enhance Structural Integrity: Provide compressive strength to withstand heavy loads, adding stability to the floor system.
• Prevent Radon Infiltration: Serve as a barrier against radon gas, promoting a healthier indoor environment. 

• Comply with Building Codes: Meet or exceed energy efficiency standards and building codes that require under-slab insulation.

   

Applications of Under Slabs Insulation

• New Build Projects: For homes and buildings with concrete floor slabs system is the best solution.
• Basements & Ground Floors: To reduce ground heat loss and moisture ingress.
• Warehouses & Industrial Facilities: Where high compressive strength insulation is critical.
• Passive House & Low-Energy Buildings: Meets strict thermal performance targets.

• Garage Floors & Utility Rooms: Ideal for areas where cold floors are common.

   

Structural Installation Tips

• Prepare the Base: Ensure the ground is level and compacted before installation.
• Install Vapor Barrier: Lay a vapor barrier to prevent moisture infiltration.
• Place Insulation Boards: Position the insulation boards tightly together to avoid gaps.
• Seal Seams: Use appropriate tape to seal seams and enhance moisture resistance.
• Pour Concrete: Proceed with pouring the concrete slab over the insulation layer.

Why Buy from Insulation4US?

• Wide Selection: Find our diverse range of under-slab insulation products to suit various project requirements.
• Expert Advice: Our team of insulation experts and professionals is available to assist you in selecting the right product for your needs.
• Competitive Pricing: We provide high-quality insulation materials at competitive prices.
• Fast Shipping: Enjoy prompt delivery to keep your project on schedule.