If you're considering spray foam insulation for your home or business, you probably have questions about how it works, what it costs, and whether it's the right choice for your property. Below are answers to some of the most common questions homeowners ask about spray foam insulation.
Weathertight Spray Foam provides professional spray foam insulation throughout New Hampshire, Southern Maine, and Northern Massachusetts.
What Is Spray Foam Insulation?
Spray foam insulation is an insulation material that is sprayed onto surfaces where it expands and adheres to create an insulating and air-sealing layer. Unlike traditional batt or loose-fill insulation, spray foam can fill gaps, cracks, and hard-to-reach areas.
Spray foam is commonly used in attics, walls, crawl spaces, basements, rim joists, foundations, floors, and other areas where air leakage or inadequate insulation may be a concern.
The two primary types are open-cell and closed-cell spray foam. The right option depends on the area being insulated, the existing construction, moisture considerations, available space, and the goals of the project.
What Is the Difference Between Open-Cell and Closed-Cell Foam?
The main differences are density, structure, R-value per inch, and moisture resistance.
Open-cell spray foam is lighter and softer and expands significantly after application. It is often used for larger cavities such as walls and attic areas where a flexible insulation and air seal are appropriate.
Closed-cell spray foam is denser and more rigid. It generally provides a higher R-value per inch and offers greater resistance to moisture and water vapor. It can be particularly useful where space is limited or additional moisture resistance is desired.
A professional can help determine which type is appropriate for each area of your home.
How Much Does Spray Foam Insulation Cost?
The cost of spray foam insulation varies from project to project. Factors that can affect the price include:
- The size of the area being insulated
- The type of spray foam used
- The thickness of the application
- Accessibility of the area
- Existing insulation and construction
- Preparation or removal work that may be required
- The complexity of the project
Because every property is different, the best way to determine your cost is with a property assessment and estimate.
Is Spray Foam Worth the Investment?
Spray foam can be a worthwhile investment when improving air sealing, insulation performance, and overall home comfort are priorities.
By helping reduce unwanted air movement and heat transfer, spray foam may help make rooms more comfortable and potentially improve energy efficiency. The value of the investment depends on the condition of the home, the areas being insulated, the type of insulation selected, and the property's heating and cooling needs.
How Long Does Spray Foam Last?
Properly installed spray foam insulation is designed to provide long-term performance. Unlike some loose insulation materials, spray foam adheres to the surface and maintains its structure when properly installed and protected.
The expected performance of a spray foam installation can depend on the product, installation conditions, building conditions, and whether the foam is exposed to factors that could damage it.
Is Spray Foam Waterproof?
Spray foam should not simply be considered a waterproofing system.
Closed-cell spray foam has greater resistance to water and water vapor than open-cell foam, and it can provide useful moisture resistance in appropriate applications. However, spray foam does not replace proper drainage, exterior waterproofing, flashing, grading, or other moisture-management measures.
A building should be evaluated as a complete system when moisture is a concern.
Can Spray Foam Prevent Drafts?
Yes. One of the major benefits of spray foam insulation is its ability to help reduce drafts by creating an air seal.
Spray foam expands into gaps, cracks, and irregular spaces, helping reduce unwanted air movement through the building envelope. Proper preparation and installation are important for achieving an effective air seal.
Can Spray Foam Help Lower Heating Bills?
Spray foam can help improve a home's energy efficiency by reducing unwanted air leakage and heat transfer. In a New Hampshire home, where heating is an important part of the annual energy load, improving the building envelope may help reduce the amount of energy needed to maintain comfortable indoor temperatures.
Actual energy savings vary based on the home, existing insulation, air leakage, heating system, weather, and other factors. Spray foam should be viewed as one part of an overall energy-efficiency strategy.
Is Closed-Cell Foam Better for Crawl Spaces?
Closed-cell spray foam can be a good choice for certain crawl-space applications because it is dense, rigid, and more resistant to moisture and water vapor than open-cell foam.
However, the best insulation approach depends on the specific crawl space, including its construction, moisture conditions, ventilation, access, and how the space is being used.
Spray foam is not a substitute for addressing existing water intrusion or drainage problems.
Can You Spray Foam an Existing Home?
Yes. Spray foam insulation can be installed in many existing homes as well as new construction.
Common retrofit applications include:
- Attics and rooflines
- Exterior walls
- Crawl spaces
- Rim joists
- Basements
- Foundations
- Floors over unconditioned spaces
- Difficult-to-insulate areas
The installation approach depends on the home's construction and the areas being addressed.
Can Spray Foam Be Installed in an Attic?
Yes. Attics are one of the most common applications for spray foam insulation.
Depending on the home's design and project goals, spray foam may be applied to the attic floor or roofline. Insulating the appropriate surface can help address air leakage and heat transfer between the conditioned living space and the attic.
The proper approach depends on the home's ventilation, roof construction, existing insulation, and overall building-envelope design.
How Long Does Installation Take?
Installation time varies depending on the size and complexity of the project.
A smaller residential project may take considerably less time than a large attic, whole-home, commercial, or new-construction installation. Preparation, accessibility, existing insulation, and the number of areas being treated can also affect the schedule.
During your consultation and estimate, Weathertight Spray Foam can discuss the expected scope and installation process for your project.
Do I Need to Leave My Home During Installation?
Depending on the type and size of the project, homeowners may need to leave the property during spray foam installation and for a period afterward.
Spray foam installation involves chemicals that require appropriate application procedures, ventilation, and safety precautions. The specific re-entry time depends on the products being used and the installation conditions.
Your installer should provide instructions regarding occupancy, ventilation, and when it is appropriate to return to the home.
Is Spray Foam Safe?
When properly selected, installed, and handled according to the manufacturer's requirements, spray foam insulation can be safely used in residential and commercial buildings.
Professional installation is important because spray foam involves chemical components, application equipment, temperature requirements, and installation procedures that need to be properly controlled.
Homeowners should follow the installer's recommendations regarding preparation, ventilation, and re-entry after installation.
What Areas of New Hampshire Do You Serve?
Weathertight Spray Foam serves homeowners and businesses throughout New Hampshire, including the Seacoast, Lakes Region, Manchester area, Concord area, and communities throughout the state.
Our service area includes communities such as Portsmouth, Hampton, Rye, Exeter, Dover, Manchester, Concord, Wolfeboro, Laconia, Meredith, Gilford, and surrounding areas.
If you are located elsewhere in New Hampshire, contact us to find out whether we serve your area.
Do You Serve Southern Maine?
Yes. Weathertight Spray Foam provides spray foam insulation services throughout Southern Maine.
Our service area includes communities in and around Portland, South Portland, Scarborough, Falmouth, Kennebunk, Wells, York, Kittery, Biddeford, Saco, Brunswick, and other Southern Maine communities.
Contact us to confirm service availability for your specific location.
Do You Offer Free Estimates?
Yes. Weathertight Spray Foam offers free consultations and estimates.
During the consultation, we can discuss your property, identify areas where spray foam may be appropriate, answer your questions, and develop a recommendation based on your project.
Whether you are building a new home, renovating an existing property, or addressing an attic, crawl space, wall, or other area, we can help you understand your insulation options.
Why Choose Weathertight Spray Foam?
Weathertight Spray Foam provides professional spray foam insulation for residential, commercial, renovation, and new-construction projects.
Our services include:
- Open-cell spray foam insulation
- Closed-cell spray foam insulation
- Hybrid spray foam insulation
- Attic insulation
- Crawl space insulation
- Wall insulation
- Under-slab insulation
- New construction insulation
- Commercial spray foam insulation
We serve customers throughout New Hampshire, Southern Maine, and Northern Massachusetts.
Get a Free Spray Foam Insulation Estimate
Have questions about spray foam insulation for your home or business? Weathertight Spray Foam can help you understand your options and determine what approach may be appropriate for your property.
Call Weathertight Spray Foam today at 603-343-3266.