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Did you know?
The E.P.A. states that common sources for indoor air quality problems include chemicals from building materials & mold

Did you know?
You may qualify for tax credits by improving your home's energy efficiency. Check it out at

Did you know?
The US Department of Energy studies show that 40% of your home's energy is lost due to air infiltration

Did you know?
The E.P.A. states that common sources for indoor air quality problems include chemicals from building materials & mold.

Frequently Asked Questions

Our brochures will provide additional information that may help in answering some of your most important questions. Just click on the links below to view our brochures.

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Why should I choose Circle D Sprayfoam, Inc.?

      Lots of reasons, but for starters, it is an owner/operator company. The owner of the company will be the one that shows up for your free estimate, as well as the one that comes back and does the work. What this means to the customer is a higher level of quality.  I’m not just a sprayer for a paycheck. My name is on each and every job I do. Any jobsite changes can be quickly accommodated without having to “call the office” and check. If there is a problem it can and will be quickly remedied.

Will sprayfoam make a house too tight?
If you install a complete sprayfoam package it is advisable to have an air exchanger installed. More info on these units can be found at

What are the acoustic properties of spray foam?
If you are looking for sound deadening, open cell foam is both better and more cost effective. As an effective air seal, open cell eliminates the air gaps through which sound travels and is superior in controlling mid-range frequencies which include the most common sounds; the human voice, stereo music and plumbing noise. A lot of the sound waves are absorbed as they find their way through the foam.

Is spray foam environmentally friendly?
Yes our products are environmentally safe.

Will spray foam change physically over time?
No! Spray foam is inert. Once the foam reaction is complete, you are left with an inert, cellular plastic. It will never sag, shrink, or settle.

Will spray foam absorb water?
No! Closed Cell Foam is hydrophobic. It can be weighted down in a bucket of water for weeks and would float to the top when the weight was removed. When it was removed from the bucket it would be dry.
Open Cell Foam will absorb water but quickly dry when it is removed, losing none of its insulating abilities. It does not hold moisture, the open cells allow the moisture to pass thru.

Do any of your products contain Urea Formaldehyde?
No! Modern day spray foams do not contain any urea formaldehyde in their production. They are safe for you and your family.

Is the foam insulation corrosive to metals?
Spray foams are non-corrosive. They are neutral, neither acidic or alkaline, and therefore ideal for metal construction.

Does spray foam support bacteria or fungal growth?
No! spray foam does not retain water and is inert; therefore it does not support bacteria or fungal growth.

Do insects and vermin eat spray foam insulation?
Spray foam offers no food value but it would not present a sufficient barrier to their entry if they decided to chew through it.

What are the flammability and fire-rating characteristics?
Spray foam will not sustain flame upon removal of the flame source.  However, like fiberglass, it will be consumed by flame, and sheetrock or other acceptable thermal barriers are required by applicable building codes.

What if it is installed in a place not suitable for sheetrock??
If the installation is unsuitable for sheetrock we paint the foam with a thermal barrier paint that has been approved by the Maine State Fire Marshall. For more information on this paint click here.

What does the smoke contain?
Smoke from spray foam insulation, like that of all organic materials including wood, is a complex mix of many gasses.  The major components in the smoke are carbon dioxide and carbon monoxide.

Are there any electrical wiring overheating problems associated with the application of spray foam?
NO! spray foam has been tested and is not a concern to electrical authorities.

What is the "R" factor?
Generally closed cell foam runs an R 6-7 per inch and the open cell runs 3.4 to 3.9 per inch. This varies slightly with the manufacturer.

How much foam is needed?
This is determined by several factors, such as use of the building and the location. Typically most homes vary with 2” to 3” in the wall assemblies and 4” to 5” in the roof assemblies. Rock foundations and crawlspaces will greatly benefit with as little as 2”

How is sprayfoam priced?

Foam is sold by the board foot, which is a square foot 1” thick. Example: If you were to spray 3” thick you would have 3 bd.ft. per sq. ft. 5” thick would be 5 bd.ft. per sq.ft., and so on.
    Price per board foot varies with amount to be sprayed, location, degree of difficulty, etc.

How is it figured?
Take your total square footage of your walls, ceilings or other areas to be insulated. Subtract the square footage of doors and windows. Multiply this figure by the thickness of insulation required. This will give you your total board footage. Multiply this by the price per board foot.

Please call for current pricing.

Is there a temperature requirement?
Yes, the surface we spray to must be at least 40 degrees Fahrenheit. We check this before every job and at the beginning of every day.

Can this be done in the winter?
Yes, as long as we have the ability to get the spray surface to the required temperature. We have temporary space heaters to achieve this.

Is there a moisture requirement?
Yes, the surface we spray to must have less than 18% moisture content. We check this before every job and at the beginning of every day.

Do you shave off excess foam?
Yes, when we leave a jobsite it is ready for the next phase of construction. All our jobsites are left broom clean and is so stated in the contract.

Do you service my area?
Yes, we provide statewide service. Of course there is a minimum charge we have to get depending on location.

Does sprayfoam comply with local building codes?
Absolutely- for more information on the Maine codes click here:

Call Us Today: 207-379-2787 or 207-461-3686All Images and its name © Circle D Sprayfoam, Inc. 2008