R value is a critical part when comparing spray foam to other types of insulation.
Open vs closed cell attic insulation.
This makes the foam a softer more flexable material.
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.
Open cell foam is full of cells that aren t completely encapsulated.
Architectural firms can specify both the building envelope for a total performance option.
Both icynene open cell and closed cell spray insulation are effective insulators with both working as barriers for air leakage.
Closed cell is denser better insulating.
Open cell has an r value of 3 7 and closed cell has an r value of 6 5 based per inch of installed spray foam.
Id go with closed cell.
Closed cell foam can also increase the racking.
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.
The cells are pressed together so air and mositure are unable to get inside the foam.
Open cell is more susceptible to mold and mildew but its expanding so it can hermetically seal an area.
Closed cell spray foam exterior applications.
In other words the cells are deliberatly left open.
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.
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.
However open cell and closed cell have their different uses.