Barn Home Plans

I am building a steel (pole barn) home and plan for great insulation. (R-30 walls) Is this a barrier film of radiant energy for the 4 walls and the ceiling really help reduce my costs AC? and so I use the spray in place of the sheet does also act as a sealer?

A closed cell foam will act as a sealer or barrier, whereas open-cell foam will not. Because closed-cell foam is twice the price of open cells, often with a thin layer (1 inch) closed cell is applied first and the rest is filled with open cells. The R value between the two is close ... approx. 5 p. inches. Service of six foam has a value of approximately R-30. 6 "fiberglass is about R-19 and about half the cost.

As for sheet radiant .... I do not know enough to give an answer.

For more information on the foam see link below .... one of many.

http://www.energyefficientsolutions.com/ ...

Good Luck

EDIT: Sorry .... just reread the issue, when you said that I was thinking of spray foam spray, not bright. The link provided no information on the obstacles, both spray and aluminum foil. Sorry for the confusion.

Remember, there are two types of heat transfer in your organization. heat conduction and radiant heat if the building catches all direct sunlight a lot of sun. The heat flux is dictated by the temperature difference inside and outside surface. The greater the difference, the more heat flow and the need for more R-value.

What happens is that a standard 90 ° day, a wall or ceiling that catches direct sunlight can easily reach 130 degrees or more depending on the density and composition from the outside. If the temperature outside surface is 130 º wall acts like he's really 130 º outside because of the radiant heat gain.

The key to good thermal insulation is to treat the two types of heat sources. Basically, you want to build a well insulated, airtight container. Foam, fiberglass, cellulose, you look - spray foam provide the best barrier to the air. Then you want essentially the WRAP box with a reflective surface (radiant barrier) http://www.atticfoil.com/ to reflect radiant heat and maintain the exterior surface temperature get closer to room temperature.

The best illustration is to take two identical refrigerators and put out the sun. Common sense says if you wrapped one of the refrigerators with foil (radiant barrier), then just below the surface of the sheet would not be much warmer than the air temperature outside. If we can reduce the temperature difference between the indoor and outdoor temperature, then you have less heat flowing inward and less heat to remove (air conditioning) costs you money. Another simple example is to put a cooler in the shade will keep the things inside cold longer, and in direct sunlight. Packing a cooler with radiant barrier would be almost the same as that put in the shade. House Wrap Radiant Barrier Check here: http://www.atticfoil.com/perforated-radi ...

It's like a car parked in the shade will not "hot". It will also warm the air temperature outside, because there is virtually no flow of radiant heat in the car.

So if you want to "isolate Super", do what many home builders today are high performance. You want "OUTsulate" first by putting some type of insulation to the exterior of your structure to eliminate / reduce the bypass thermal maximum protection against the heat flow by conduction. Then wrap the structure with radiant barrier to reduce radiant heat flow.

Way over kill ...... the movie is a joke. R-30 2x6 walls. If you have 2x4 walls, 19 is.