Open Cell Foam
Open cell spray foam insulation contain tiny air pockets that are not completely closed which traps air and inhibits the transfer of heat. It creates an excellent breathable air barrier but doesn't provide any type of water vapor barrier as water vapour pass through the foam to the air space beyond where an air gap removes the water vapour.
Open cell spray foam therefore is a breathable airtight insulation as only water vapour and not the warm air escapes . Open cell is also used within interior walls and floors because of its sound reduction qualities. Open cell is less expensive than closed cell but is not recommended for outdoor applications.
Spray Foam Attic Insulation
Insulating your attic with spray foam insulation has become the most effective method to save you money on your home heating bills. Remember a 50mm vapour gap is required by part L of the building regulation so water vapor can escape from your home.
Breathable Vent Card
As per building regulations a 50mm air gap must be left before the foam can be sprayed. Our breathable vent card removes this problem. The vent card is only needed when Open cell spray foam is used, as closed cell foam is not "Breathable".