Spray Foam Insulation Cost: Closed Cell vs. Open Cell, Pros & Cons – The Ultimate Guide

Spray Foam Insulation, also known as Spray Polyurethane Foam (SPF), is considered one of the best insulating, and air sealing, and weatherization materials on the market today. In fact, there is no other material available that comes close to providing the insulation and weather-proofing benefits of SPF.

Spray Foam (SPF) Insulation Overview

Open Cell Spray Foam Insulation Application in between the Wall Cavities.
via GreenBuildingAdvisor.com

SPF is frequently used to insulate and air seal residential, commercial, and industrial buildings. A professionally done spray foam insulation application can completely insulate your home including walls and wall cavities, basements and crawlspaces, roof deck and attic space, as well as help seal those key spaces from the air leaks and moisture penetration.

Did you know? Home insulation upgrades including SPF can result in a more comfortable, healthier, and more energy-efficient home, with an average annual reduction of 15% in home heating and cooling costs. Such an upgrade can be especially consequential for homes located in areas that experience extreme temperatures, whether it be the blistering cold of winter or the sweltering heat of summer.

Once cured and hardened, spray polyurethane foam can actually help strengthen the walls and the roof structure of a house, as well as help protect against moisture, dust, pollen, insects and mold.

Spray Foam can be used in a variety of applications, not just for insulation, and will self-adhere to almost any material including concrete, wood, steel, and most existing roofing materials when spray foam is used as a roofing material for Spray Polyurethane Foam (SPF) roofing applications.

Fun Fact: SPF can even be used to create a tapered roofing system, in which the pitch or slope of the roof is created by the insulation itself!

Before you contact a professional, it’s always a good idea to know something about SPF and which type will best suit your project.

Beyond the Basics:

In this guide, we will answer the following questions:

  1. Cost to Install Spray Foam Insulation
  2. What is Spray Foam (SPF)
  3. Where Can SPF Insulation Be Used
  4. Pros and Cons of SPF
  5. Open Cell and Closed Cell Foams (Structure and Density)
  6. Two-Component vs. One-Component SPF
  7. High vs. Low Pressure Installation
  8. Application and Installation Considerations
  9. Cost Savings and ROI Benefits

Cost to Install Spray Foam Insulation: Closed Cell vs. Open Cell Foam

On average, you can expect to pay between $1.00 and $3.00 per square board foot (1 inch thick) of spray foam insulation fully installed.

For example, to install 1,500 square board feet of one inch-thick Closed-Spray foam insulation in the attic space of a house, it will cost between $1.50 and $2.50 per square board foot, on average, with the total project cost ranging from $2,250 to $3,750, fully installed.

With the Open Cell Foam (a less-costly option), your cost will likely range between $.5 and $1.50 per square board foot (1 inch thick), depending on the size and type of application, accessibility, and your home’s location.

Note: The average cost per square board foot will largely depend on the type of spray foam insulation being installed (closed-cell foam is more costly than open-cell foam), project size (the larger the project the less you will general pay on per square board foot basis for spray foam), your home’s location (local real estate market and demand for remodeling services), ease of access, and other project-specific variables.

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Roof & Attic Space Insulation Options, Costs, and Pros & Cons

Why Bother Insulating Your Roof and/or Attic Space?

Insulating your roof and attic space will help retain energy in your home, often leading to cost savings and comfort improvement.

Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming, which results from the warm air trying to escape through the apex of the roof, but instead heating up the snow. Additionally, insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.

attic space insulation
New Shingle Roof

$7,500
Average price
New Metal Roof

$14,500
Average price
New Flat Roof

$8,225
Average price

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There are five primary types of insulation for roofs, with their own advantages and disadvantages. The key value is always the capacity of insulation to resist heat flow. — This is also known as thermal resistance and is often measured in terms of R-value. The higher that value, the better the insulating power.

Loose-Fill Insulation

This is one of the two most common types of insulation. Often installed into wall cavities as a way to retro-fit walls lacking insulation, it can also be blown into unfinished attic spaces. Typically, fiberglass or cellulose are the material choices.

R-value for loose-fill per-inch is between R2 and R4, higher value with fiberglass

Pros: relatively low expense, fairly easy to install (blown-in or poured in)

Cons: as the material settles over time, the R-value is (slightly) lessened, needs vapor barrier as the material is prone to moisture absorption

Cost: Generally, homeowners seek between R30 and R50, and to achieve that for loose fill over 1,000 sq. ft. the cost amounts to $500 to $900 installed.

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Roof Maintenance: Shingles Inspection, Attic, Gutters, Ice Dam Prevention

Asphalt is one of the most popular materials used in residential roofing. Statistics suggest that roughly 80% or four out of every five homes in the US are covered with asphalt shingles. Asphalt shingles are affordable, look good, and hold up reasonably well against the elements.

Roof in need of a maintenance or replacement due to cracks or thermal splitting in asphalt shingles

via Structure Tech

A roof is a big investment for homeowners, and it’s important to protect your investment by conducting regular, thorough maintenance. A little roof maintenance goes a long way toward extending the service life of your roof and a thorough inspection will find small problems to fix before they become big repairs with expensive price tags.

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