spray foam 10x the cost, why do it.

love the idea of the spray foam but I wonder if my money isn&#;t better spent elsewhere. 2 1/2 inches would be about R-17.5, 3 1/2 inch fiberglass is R-13. 600 sq ft of spray is around dollars, same area with fiberglass is 150 bucks. I&#;d still have to put plastic on fiberglass to get vapor barrier but significant difference for 4.5 more insulating value. I could double the fiberglass, 7 inches thick and have R-26. This is for floor over crawl space. Obviously the fiberglass is my cost, no labor as DIY project.

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Kevin

When budgeting for a spray foam insulation project, there are a few factors to keep in mind, including the spray foam&#;s thickness and whether you hire a pro to apply it for you.

Spray Foam Thickness

Applying spray foam in thicker applications will end up costing more than thinner applications of the same foam type because it will require more materials and labor. Typically you&#;ll want to apply open-cell spray foam thicker than you&#;ll need to apply closed-cell spray foam because closed-cell has a higher R-value. However, always follow manufacturer instructions and assess based on where you&#;re applying it.

Location in Home

The location of the insulation in your home can also affect your costs since different areas require different types and thicknesses of spray foam insulation.

• Attic: Insulating an attic is often the most costly insulation project largely because it requires thicker insulation to adequately prevent heat loss. Attics also may be more difficult to access, which can further increase costs.
• Basement: Basement insulation can also get pricey since it often requires the extra moisture resistance provided by closed-cell insulation, which costs more than open-cell. Like attics, basements can also be more difficult to reach and navigate than other areas of the home, potentially driving up costs.
• HVAC: HVAC insulation applications require precision to adequately insulate all of the little nooks and crannies around your HVAC ducts and vents. It also often involves insulating hard-to-reach areas, like basements and crawl spaces. The complexity of this installation can increase your costs.
• Garage: Garage insulation costs vary widely. If you only need basic insulation to protect equipment from extreme heat or cold, then it&#;s relatively inexpensive compared to other areas in the home. But if you want to extend your livable square footage into the garage, creating a comfortable space that you can use all year, you&#;ll likely need more insulation to properly regulate and control the temperature, which can increase your costs.

Accessibility

If you&#;re insulating an area that&#;s difficult to access and navigate, like a crawl space or small attic, it can require more time, labor and special equipment to complete, which will increase your costs compared to insulating highly accessible spaces.

Labor Cost

Unless you&#;re insulating the space yourself, you&#;ll need to hire a pro to do it. Labor costs vary depending on the company, location and season, but they typically add between $0.44 and $3.20 per square foot to your overall costs. Some contractors may also charge per hour, so be sure to ask how they determine their prices before hiring.

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New Construction vs. Current Home

It&#;s generally easier and more affordable to insulate new construction due to the absence of existing structures and insulation. Retrofitting insulation in an existing home often requires additional labor and planning since there are already structures and systems in place that you&#;ll need to navigate around. Insulating new construction usually ranges from $2.75 to $6.50 per square foot, including labor, while insulating existing construction costs between $3.15 and $7.50 per square foot.

Spray Foam Material Type

Spray foam insulation can be made of several different materials. The material you choose can significantly affect your costs.

• Traditional polyurethane spray foam: Polyurethane is the most popular spray foam insulation material. It&#;s also the most affordable, ranging from $0.44 to $1.50 per board foot. However, some may have concerns about the environmental and chemical impacts of this type of spray foam.
• Soybean spray foam insulation: Soybean spray foam insulation can be a greener alternative to polyurethane insulation, but it&#;s also pricier, ranging from $1.15 to $2.50 per board foot.
• Water-based spray foam: Water-based insulation is typically among the best insulation materials when it comes to low environmental impact, but it can affect the efficiency of surrounding oil-based insulations. It usually costs between $0.50 and $2.50 per board foot.
• Vegetable oil spray foam insulation: Vegetable oil spray foam insulation is also typically considered to be environmentally friendly, but it&#;s not as widely available as other insulation types, which increases its costs, ranging from $1.50 to $3 per board foot.

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