Image of the cement foundation of a residential building
Spray Foam United States

Foundation and Under Slabs

When used as continuous insulation on the foundation wall, closed-cell spray foam provides occupant comfort by managing interior temperature variations and reducing the potential for condensation on surfaces in the basement. Closed-cell spray foam can also be used as a continuous insulation under the concrete slab for a variety of benefits.

Spray Foam United States
Applications
Residential
Foundation & Under Slabs

Spray Foam United States

Foundation & Under Slabs

Start With A Solid Foundation

Spray polyurethane foam (SPF applied to the exterior foundation of residential home can provide energy savings, a more uniformly conditioned space, help to manage moisture and may also provide a good base for the application of a liquid-applied waterproofing or damp-proofing material. When spray foam insulation and coatings are used together, a seamless and fully adhered system is created that is unmatched by conventional foundation insulation and waterproofing systems.

In addition, when applied to basement walls and under slab, WALLTITE® closed-cell SPF can help control entry of radon and other soil gases.

Image of a construction site with the cement foundation finished

Benefits of Insulating Foundation and Slabs with SPF:
 

  • Closed-cell structure to help manage water vapor transmission
  • Acts as a secondary barrier to bulk water entry, preventing moisture-related problems in below-grade areas
  • Helps prevent soil gas migration through the concrete slab or foundation footings
  • Excellent adhesion ensures long-lasting performance, while its high R-value is unaffected by moisture

BASF Solutions for Foundations & Under Slabs

WALLTITE BASF Closed-cell Spray Polyurethane Foam applied in wall cavity
WALLTITE®
WALLTITE® is a high-performance, closed-cell spray polyurethane foam (SPF) insulation that creates a seamless insulating air barrier to help improve the energy efficiency, comfort, and durability of homes and buildings. Spray-applied as a liquid, WALLTITE® expands and adheres to most substrates, flowing into cracks, joints, and hard-to-reach areas to form an airtight seal. Its closed-cell structure also adds rigidity and can help reduce air leakage and moisture intrusion, supporting long-term building performance. WALLTITE® easily seals corners and transitions, as well as areas around pipes, wiring, and other openings.
  1. Learn more about WALLTITE®
Image of a flat roof with BASF Spray Polyurethane Foam Roofing system installed
SKYTITE®
SKYTITE® high-performance roofing systems provide seamless, leak-free protection from the elements, delivering some of the highest wind uplift and hail resistance ratings in the industry. Spray-applied as a liquid, these exterior low-slope roofing systems are self-flashing and easily conform to unusual shapes and complex details, helping create a continuous, monolithic membrane. SKYTITE® can be applied over many existing substrates, reducing disruption, minimizing the need for costly tear-offs, and helping cut landfill waste. This high-density SPF material, typically used in roofing applications, can also be utilized below slab when higher compressive values are needed, such as in garages and other high-load areas. The result is durable, long-lasting protection that supports building resilience, performance, and application versatility.
  1. Learn more about SKYTITE®