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Ivan King

How Much Does Closed-Cell Spray Foam Insulation Cost?


One of the most common questions we receive is, "How much does spray foam insulation cost?" While it’s challenging to compare the price of spray foam with other insulation types due to its long-term benefits—such as superior air sealing, extended lifespan, and reduced energy bills—this guide aims to give you a clear idea of what you can expect to pay for your project. 


Factors Affecting Closed-Cell Spray Foam Cost Much like purchasing a new vehicle, several factors can influence the final price of your spray foam insulation project. On average, closed-cell spray foam costs between $1.20 and $2.50 per board foot. 



 What Is a "Board Foot"? 


A "board foot" is the standard unit of measurement used to price spray foam insulation jobs. One board foot equals a 1’ x 1’ x 1” volume of foam. 


Example: If you have a wall that is 10 feet by 10 feet and need 1 inch of foam, that wall would require 100 board feet (BF). If you opt for 3.5 inches of foam, the requirement would increase to 350 BF. While the price per board foot is a good starting point, it's not the only factor to consider. 


 5 Key Factors That Influence Spray Foam Pricing 


1. Size of the Job - The size of your project plays a significant role in the overall cost. Larger jobs allow us to set up equipment once and work for several days, reducing the cost per board foot. For example, we’ve insulated large homes (2,500+ square feet) for $20,000-$30,000, with prices dropping to under $1.30 per board foot. In contrast, smaller jobs like rim joists, which may take 3-4 hours, can cost between $1,500 and $3,000, using only a few hundred board feet of foam. 


2. Job Difficulty - The complexity of the job also affects pricing. For instance, consider two crawl spaces, both 20 ft x 30 ft with 3 inches of foam. The first is 4 feet above a concrete slab, while the second is 2 feet above muddy ground. The first might cost around $2,800 ($1.55/bf), whereas the second could be $3,330 ($1.85/bf) due to the challenges posed by the muddy ground and restricted space. 


3. Location of the Job Site - Travel time to the job site can also impact costs. For example, insulating an attic in a 20 ft x 30 ft hunting camp with 5.5” of foam might require 3,850 board feet. In Binghamton, NY, with minimal travel time, the job might cost $5,500. However, the same job in Syracuse, NY (about 3 hours away), could cost closer to $6,000 due to the additional travel. 

 

4. Excessive Foam Usage Applications - Certain applications, like insulating a stacked stone foundation, may require extra material to achieve the desired insulation depth. For example, insulating the first floor of a 26 ft x 40 ft house with 3 inches of foam might cost $4,500. If the house has a stacked stone foundation, it could also cost around $4,500 to apply 2 inches of foam in the basement due to the increased material needed. 



5. Retrofit vs. New Construction - Retrofit projects, such as insulating rim joists in finished basements or areas with existing flooring and ceilings, tend to be more challenging to price. These jobs often require an estimator to provide a more accurate quote, based on the specific conditions of your home. 


Choose Spray Foam By IOK for Quality Insulation 


We hope this guide has provided you with a better understanding of the potential costs associated with your spray foam insulation project. For top-quality materials and expert workmanship, contact Spray Foam by IOK today. 


We’d be happy to discuss your project, the benefits of spray foam insulation, and provide you with a detailed estimate. 


See Our Work Interested in seeing some of our completed projects? Visit our website  [www.sprayfoambyiok.com](www.sprayfoambyiok.com).

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