Foam is inserted into walls for two main reasons. Insulation is the primary reason, while fireblock is the second.
Foam insulation can be injected into the wall of an existing building without much destruction (typically just a series of one-inch holes to be filled). It increases the R value of a wall from about 2 up to about R11. It also cuts off air leaks and can cut off entry points for pests.
Some (not all) foams are highly fire resistant. They can keep fire from racing up through the stories of a home.
Foams also can help with sound deadening.
No. You need to let the house breathe.
Depending on your homes construction material,sealant may be applied to the exterior ti seal walls.
10 feet thick
An exterior wall is simply a wall that has one of its surfaces on the outside of a building. Exterior walls usually have windows and doors, but not all the time. Both sides of interior walls are inside the building.
The thickness of a wall would depend on the construction. Modern houses would probably have exterior walls not much thicker than a brick. As a rule the older the house (and colder the climate) the thicker the walls. I've seen exterior walls 4 feet thick in medieval welsh cottages for example.
2 to 6 ml. visqueen is commonly used as a vapor barier on the inside of exterior walls, before drywall installation, if that's the application that you are referring to.
Walls of Sound A Look Inside the House of Records - 2012 was released on: USA: March 2012
Paint with bleach and then clean with high pressure hose
All exterior walls in a home are load bearing. The exterior walls on the gable end of your house do not bear much load, but the walls that the hip of the roof bear on carry your roof and ceiling joints. Interior walls are another story. Usually in a smaller one story home there is a wall that runs the midspan of the house that is load bearing for your roof and ceiling joints.
Bulging of exterior walls often results in sagging of the ridge board.
insulation is used on all exterior walls and around windows and doors in in the attic of a home
The cell wall is similar to the outside walls of a house. They both provide structure for the inside.