A spray insulation is referred to open cell or closed cell because of the difference between the small bubbles cells that make up the foam.
Open vs closed cell attic insulation.
Id go with closed cell.
This makes the foam a softer more flexable material.
Closed cell foam is made up of cells that are as the name suggests completely closed.
Open cell foam is full of cells that aren t completely encapsulated.
When it comes to insulating a home whether that s a roof insulation or floor insulation it is ideal to use icynene open cell spray foam.
Closed cell spray foam exterior applications.
Insulating value and strength open cell foam has an r value of about 3 5 to 3 7 per inch while closed cell foam has an r value of about 6 per inch.
Open cell is more susceptible to mold and mildew but its expanding so it can hermetically seal an area.
Closed cell is denser better insulating.
Closed cell foam can also increase the racking.
However open cell and closed cell have their different uses.
R value is a critical part when comparing spray foam to other types of insulation.
In other words the cells are deliberatly left open.
Both icynene open cell and closed cell spray insulation are effective insulators with both working as barriers for air leakage.
Seems like you wouldnt want to seal something susceptible to mold growth but maybe thats just me.
When applied on the interior open cell spray insulation provides performance advantages that differ from those of closed cell spray foam used on the exterior.
The insulation is blown into the wall or attic one layer 1 at a time.