Which foam is right for me?
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Questions to ask when deciding between open and closed cell foam:
1. How much space is available in your wall or attic?
2. Will the area be exposed to moisture?
3. Does the structure require extra reinforcement?
4. Is sound a concern?
5. Is it going to be covered by drywall (so that providing additional vapor barrier is an option)?
Closed Cell Foam
Closed cell spray foam insulation is made of a dense foam that is filled with small, sealed cells. These cells are completely sealed and filled with a gas, which gives the foam its rigid, hard texture.
Closed cell spray foam insulation has a higher R-value than open cell spray foam (1″ = R7), meaning it is has higher thermal resistance and can fit more into smaller spaces.
It is also more resistant to moisture, mold, and mildew, making it a better choice for damp or humid environments.
Additionally, closed cell insulation can be used as a structural reinforcement, it can add rigidity and strength to a structure.
We recommend closed cell insulation be used where space is limited, and on all shops, garages, or any place else that the foam could be in contact with moisture.
Open Cell Foam
Open cell spray foam insulation is made of a low-density foam that is filled with tiny, open cells. These cells are not completely sealed and are filled with air, which gives the foam its soft, spongy texture.
Open cell spray foam insulation has a lower R-value than closed cell spray foam (1″ = R3.8), meaning it has lower thermal resistance and requires larger cavities to achieve the same insulation value as closed cell.
It is also more permeable to water vapor, which means it may not be suitable for damp or humid environments. We also recommend that a vapor barrier primer be painted on the interior surfaces of the house (drywall) to protect the foam from moisture in the air.
Open cell foam is generally a less expensive option, and is recommended if your project provides enough space to achieve your desired r-values.
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In most cases, we can get you an estimate over the phone or by email. We may ask you to email us plans and/or photos.