Architectural firms can specify both the building envelope for a total performance option.
Open vs closed cell attic insulation.
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.
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.
Seems like you wouldnt want to seal something susceptible to mold growth but maybe thats just me.
Closed cell foam can also increase the racking.
R value is a critical part when comparing spray foam to other types of insulation.
The cells are pressed together so air and mositure are unable to get inside the foam.
In other words the cells are deliberatly left open.
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.
Closed cell is denser better insulating.
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.
This makes the foam a softer more flexable material.
Closed cell spray foam exterior applications.
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.
However open cell and closed cell have their different uses.
Open cell is more susceptible to mold and mildew but its expanding so it can hermetically seal an area.
Both icynene open cell and closed cell spray insulation are effective insulators with both working as barriers for air leakage.