How Much Does Spray Foam Insulation Cost
Jun 26, 2023
Spray foam insulation is a popular and effective method of insulating homes and buildings, providing superior thermal resistance and energy efficiency. It offers numerous benefits, including reduced heating and cooling costs, improved indoor comfort, and enhanced moisture control. Suppose you’re considering spray foam insulation for your property. In that case, it’s essential to understand the associated costs to make informed decisions and budget accordingly. In this guide, we will explore the factors that influence spray foam insulation cost, discuss the different types of spray foam insulation available, and provide you with a general overview of the expenses involved.
Price of Spray Foam Insulation
Filling a wall with open-cell foam spray insulation would cost between $123 to $182. Closed-cell spray foam insulation would cost between $280 and $420 to cover the same 80-square-foot wall. These estimates were calculated using the costs per square foot of open-cell insulation (between $0.44 and $0.65) and the range in price for closed-cell spray foam insulation (1.00 to $1.50).
Open-Cell vs. Closed-Cell
Installing spray foam insulation is typically between $1,284 and $3,741. However, prices can vary depending on the type.
- Open Cell: This type of spray foam is softer and more flexible because the cells do not entirely encapsulate. Installing open-cell spray insulation costs between $0.44 and $0.65 per board foot.
- Closed-Cell Foam: Like open-cell, closed-cell is made by mixing a polyurethane fluid with air. This causes the foam to expand, sealing any gaps and openings. True to its name, closed-cell foam insulation features air cells that are entirely enclosed. Closed-cell insulation foam is denser and more moisture-resistant than open-cell—closed-cell spray foam installation costs between $1 and $1.50 per square foot.
Type of Installation, Labor, and Accessibility
The labor cost for spray foam insulation is a significant portion of your final bill. Most spray foam insulation professionals are trained to install a specific brand of insulation and use a spraying rig that the manufacturer designates. Project labor costs can range from $50 to $100 an hour, depending on the location. The cost of labor is not affected by the type of insulation.
Area Size
The area that needs to be insulated will determine the project’s cost. Spray foam insulation costs between $44 and $150 for a 100-square-foot project. Most projects are more extensive; a home with 3,000 square feet of wall space will cost between $1,320 and $4,500.
Geographic Location
Spray foam insulation costs can vary significantly from one location to another, depending on the number of companies that offer the service and the average labor cost. The average price of spray foam insulation can vary widely depending on the community.
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Additional Costs and Considerations
It is best to install insulation during the construction of a new home when there are more wall openings, and it is easier to install. The labor cost for installing spray foam insulation are lower at this stage, ranging from $50 to $100 an hour. This is because the installer can easily access the spaces.
In an existing house, however, removing portions of the drywall may be necessary to gain access to the studs. Specific installers will not take on the project if these spaces are not visible. Spray foam insulation can be applied thinly in layers up to an inch thick. The first layer must be dehydrated before adding the next. The insulation cost will increase if you have to remove the drywall to reach the studs and rafter space.
Mold Remediation
Moisture is a significant problem for some types of insulation. For example, fiberglass batts can be damaged by moisture. They tend to shrink when wet and thus lose their insulating properties. Leaks in wall cavities can destroy fiberglass insulation and lead to mold growth. This should be addressed before insulating the wall again.
Mold remediation can cost between $1,500 and $3,500 depending on the size and type of the area to be treated and the labor rate in the locality.
Vapor Barrier Installation
Local building codes may require the installation of a vapor-proof barrier on exterior walls. This will prevent moisture from escaping. Professionals use closed-cell spray foam as a barrier. Open-cell insulation cannot be used as a vapor barrier. If the homeowners choose open-cell, but the code requires a vapor barrier, they must purchase an additional vapor barrier, which could cost $0.65 to $1 / square foot.
DIY vs. Hiring a Professional
During spray foam insulation it’s best to leave it to the professionals. DIYers who are enthusiastic about saving money will often do their work. Some insulation manufacturers only sell to certified and trained technicians. This means that DIYers can’t buy their product.
Spray foam insulation kits are available for DIY, but it is unclear if they are the best option. Spray foam insulation is difficult to install because you must apply it thinly. It can become saggy or expand beyond the wall studs if you use too much spray foam simultaneously. After that you must remove the excess later.
Spray foam insulation is a skillful product that requires an expert touch. The product manufacturer will likely not warranty the installation if not done by one of their certified technicians.
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