ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Estimating Spray Foam Insulation

Updated on September 29, 2010

 Estimating standard insulation is not a very hard process.  You simply find the square footage you are covering and add your materials in to come up with the amount you need and the cost of the products.  Estimating for spray foam insulation is a little more involved because you can have several different scenarios in one space based on how thick you would like the insulation.  Here are the general rules for estimating closed cell spray foam insulation.

Underside of Roof/Attic Closed Cell Spray Foam Insulation Installation

Attic insulation requires a minimum of 5 inches of closed cell spray foam insulation to meet insulation code requirements.  While insulating a flat attic with closed cell spray foam is not a popular practice, insulating sloped ceilings with spray foam insulation is the best way to insulate these particular areas. 

Wall Closed Cell Spray Foam Insulation Installation

Wall insulation requires a minimum of 3 inches of closed cell spray foam in order for the spray foam to meet the permeability and thermal resistance rating required to not only act as an insulator, but as a vapor barrier as well. 

Estimating Closed Cell Spray Foam

If you are estimating the spray foam for a job, you typically are using 600 board foot kits.  600 board foot kits hold exactly 600 board feet.  One aspect of this is that they rarely spray all 600 board feet so it is more accurate to say 550 board feet and use this as your estimating basis. 

Take your square footage of the area you are going to insulate with spray foam and multiply it by how many inches you are going to apply.  For example, I have a house that is roughly 28 x 30 feet with 9 foot ceilings.  To figure out the square footage, you can multiply the total of 28 + 28 + 30 + 30 = 116 and then multiple this by the ceiling height, 116 x 9 = 1044.  This is your square footage.  So 1,044 square feet and you need to apply 3 inches of closed cell spray foam insulation to this area.  To get this figure, multiple 1,044 x 3, since it is a wall, which equals 3,132 board feet. 

Now that you have how many board feet you need to do the job, you will need to figure out how many sets it will take.  Closed cell spray foam is purchased in sets of two tanks which equal one set.  The two tanks contain different compounds that when mixed together in the spray foam gun form the foam in the walls.  To figure out how many sets you need, take your board feet you are going to use for the project (3,132) and divide that by 550 (the amount of usable board feet in a spray foam kit).  So 3,132/550 = 5.69 sets or 6 sets since you can't purchase half or three quarter sets. 

Cost of Closed Cell Spray Foam Sets

Closed cell spray foam sets cost between $500 and $700 per set depending on where you get them.  The best places to get closed cell spray foam sets are from an insulation distributor. 

assuming you can purchase the spray foam for the $500 per set price, 6 sets would cost you $3,000.  Not a small price for insulation, but will perform more consistently with maximum air sealing to fully encapsulate the structure.

Using these formulas will help you figure out if an insulation project is right for you and your home... and your budget.


    0 of 8192 characters used
    Post Comment

    • profile image

      Peter Cantone 

      7 years ago

      For more info on getting into the spray foam biz, check us out. We Certify, build rigs and sell foam insulation across USA! We also have great ecommerce sales on

    • stucco profile image


      7 years ago

      Never thought I'd see spray foam as a DIY project. Interesting summary.

    • tuscun profile image


      7 years ago

      Thanks for the advice Energy Guild! I found your hub to be very useful. I am also an insulation/energy efficiency fan and I can only congratulate you on this very useful hub. I hope we`ll be seeing more hubs from you soon on this topic.

    • profile image


      7 years ago

      Just another tool to help those looking at foam from the business aspect, here is a foam equipment and foam rig finance calculator This tool can be really helpful and is very simple to use.

      Check back at this blog often because they have a material usage calculator coming out soon which will be extremely helpful is estimating needs for spray foam.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)