FAQs

Spray polyurethane foam (SPF) is created through a chemical reaction between isocyanate and polyol components. These components are heated and pumped through a proportioner to a spray gun, where they mix and are applied to the substrate. The foam expands during curing, forming a seamless rigid plastic layer. For proper application, the surface must be clean, dry, free of contaminants, and correctly fastened to the substrate in accordance with building codes. Contact our team for more information about spray foam roofing applications.

Spray foam is indeed permitted by all major building codes in the United States and Canada. It's one of the most extensively tested insulation products available. The International Codes Council (ICC) allows the use of SPF insulation and roofing systems in their model building codes. Specifically, the International Building Code (IBC) Section 2603 and the International Residential Code (IRC) Section R316 address SPF as a type of foam plastic, focusing on fire protection requirements for safe installation. Many SPF products have third-party code compliance evaluation reports detailing installation methods that meet model building code requirements. However, as state and local jurisdictions may adopt different editions or modify these codes, it's crucial to verify specific requirements with your local building department before proceeding with a spray foam roofing project.

Closed-cell spray polyurethane foam (ccSPF) offers significant structural benefits due to its rigid nature and strong adhesion to various materials. It can enhance the structural integrity of framed buildings by increasing the racking strength of certain framed walls and the uplift strength of framed roof decks. As little as 2-3 inches of SPF can provide these improvements. For more detailed information on the structural benefits of spray foam, we recommend consulting the Spray Polyurethane Foam Alliance (SPFA) at www.sprayfoam.org.

Closed-cell spray polyurethane foam (SPF) does not absorb water. In fact, it actively repels water and is recognized by FEMA as a flood-resistant material. While it resists water absorption, closed-cell SPF still maintains a low vapor transmission rate. This property allows the roof to 'breathe,' preventing moisture accumulation beneath the foam surface. These characteristics make SPF an excellent choice for roofing applications where water resistance is crucial.

Spray foam is not considered toxic when properly applied and cured. In typical spray foam roofing applications, any potentially hazardous fumes dissipate within 24-48 hours of installation, provided there is adequate ventilation. After this period, the cured foam is generally safe for occupants.

Spray polyurethane foam (SPF) can indeed function as an effective air barrier when applied to specific minimum thicknesses. For closed-cell foam, this thickness is approximately 1.5 inches, while open-cell foam requires 3.5-5.5 inches. When correctly installed as part of a well-designed building envelope, SPF plays a crucial role in creating air barrier assemblies and systems. For more comprehensive information on air barriers, we recommend visiting the Air Barrier Association of America (ABAA) website at www.airbarrier.org. The ABAA provides a material specification for SPF under their document 07263.

As spray polyurethane foam (SPF) is combustible, model building codes typically require it to be separated from interior spaces by a 15-minute thermal barrier, such as ½" gypsum board or drywall. In areas with limited access like crawlspaces and attics, an ignition barrier may be permitted instead of a thermal barrier. The model building codes define prescriptive thermal and ignition barriers, but alternative coatings, coverings, and assemblies may also be used. For more detailed information on thermal and ignition barriers, we recommend reviewing the SPFA guideline AY-126, available in the Technical Documents section at www.sprayfoam.org.

North Central Insulation brings over five decades of experience in spray foam application, dating back to 1969. Our spray foam crews average 20 years of experience each, demonstrating mastery in foam techniques and industry training. We hold an A+ rating with the Better Business Bureau, are fully bonded and insured, maintain a high Dunn and Bradstreet rating, and have an excellent safety record. Our commitment to customer satisfaction and integrity ensures that your project will be completed correctly the first time by a professional team with a long-standing reputation for quality work. We are a trusted local provider for spray foam and commercial roofing services.

A spray polyurethane foam (SPF) roofing system is a versatile solution that can be applied over various substrates including concrete, wood, metal, and even failed built-up or single-ply roofs. After thorough cleaning and preparation of the roof deck, a layer of SPF is applied. This liquid application rapidly forms a solid, seamless, closed-cell membrane through a chemical reaction. The thickness can be adjusted to provide additional insulation, create positive slope, or eliminate areas of water ponding. Unlike traditional roofing systems with seams, joints, and fasteners that can create thermal inefficiencies, SPF forms a monolithic layer without these potential weak points. The foam is then protected by two coats of elastomeric coating and granules, creating a durable, weather-resistant membrane. This system is self-flashing and can be applied to vertical surfaces. Only highly skilled, qualified applicators should install this system. Upon completion, an independent engineering laboratory inspects each application to validate the warranty. Our SPF roofing systems are Energy Star approved, LEED certified, UL rated, FM certified, Miami-Dade County approved, and meet California Title 24 requirements.

North Central Insulation has been at the forefront of spray foam roofing technology since 1969, making us one of the pioneering businesses in this field nationwide. The majority of the roofs we've installed since that time continue to perform well with basic maintenance. According to Home Advisor, a properly installed foam roof typically lasts for at least 20 years and can extend up to 50 years with appropriate care and maintenance.