Open Cell Foam vs. Closed Cell Spray Foam. What's the difference between open & closed cell foam?

Описание: Visit https://www.foamitgreen.com for more. What is the difference between open and closed cell foam? Closed cell foam, at about two pounds per cubic foot, is more dense than open cell foam which is typically about one half pound per cubic foot.

This higher density makes closed cell foam ideal for applications in which moisture will be a concern.

It also has a much higher R value per inch at approximately seven, compared to open cell’s at about four.

Tightly packed closed cells create a vapor retarder to stop moisture penetration which is important in projects like insulating walls, crawlspaces, and basements.

The vast majority of vapor transmission occurs through air flow, and not diffusion, which simply means “physically moving through a solid”.

The less dense, more sponge-like nature of open cell foam is a better choice for projects that are temperature controlled on both sides like sound-deadening between floors.

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If The Foam Is Soft
Foam that dispenses soft is usually also green in color. This is an indication that you dispensed more “B” component than “A” component

If the Foam is Brittle or Crunchy
Foam that has a crunchy or friable surface texture will most likely be darker in color that it should be. This is an indication that you are dispensing more “A” chemicals than “B” chemicals. Click on Checking the Gun for Proper Function for procedures to confirm this and find out how to remedy the situation.

Foam is Very Blue In Color
Foam that is very blue in color will also have a soft surface texture. In extreme cases, it may appear to liquefy or melt shortly after it is dispensed. This is an indication that you have dispensed more “B” chemical than “A” chemical, or in those extreme cases, no “A” chemical at all. Click on Checking the Gun for Proper Function for procedures to determine that this is the case, and how to remedy the situation.

Foam is Very Dark in Color
Foam that is darker in color usually also has a crunchy or friable surface texture. This is an indication that you are dispensing more “A” component than “B” component. Click on Checking the Gun for Proper Function for procedures to confirm this and find out how to remedy the situation.