Attic Insulation Hot Climates

Common practice in some areas still has it pegged at r 19.

Attic insulation hot climates.

In hot climates the primary purpose of attic ventilation is to expel solar heated hot air from the attic to lessen the building cooling load. Picking these two low hanging fruits first will yield big results with the least investment so let s start there. There are only two places you should be spending the bulk of your insulation dollars in a hot climate. A poorly insulated roof or attic or wall is cooler in winters and hotter in summer.

Best insulation for hot climates 1. The brutal sun in the southern states will cook your attic and turn it into an oven literally. A large portion of the west coast mostly in california has the advantage of moderate climates and little rainfall. Loose fill fiberglass is also a great solution because it s lightweight.

The amount of cooling provided by a well ventilated roof exposed to the sun is very small. Conductive losses also occur directly through insulation or where insulation is missing or thin. Tenwolde and carll 1992 also observed that during summer attic vents provide some cooling but with sufficient ceiling insulation the effect on cooling loads should be minor. Building codes vary among the thousands of jurisdictions but a typical requirement in hot climates is r 38.

Some regions don t require a vapor barrier. Whether using loose fill or batts put the vapor barrier closest to the warm side of your installation where hot moist air would get in facing the house s interior in cold climates beneath floor insulation and the attic s interior in hot climates on top of floor insulation. Standard fiberglass batts and blankets are the best attic insulation because they effectively slow the spread of heat and cold. Spray foam insulation is by far the best type of insulation for hot climates as it has.

Offering a clear range of air bubble thermal insulation products an extraordinary air bubble sheet which is developed with supervision and quality. Thus a good thermal insulation is a must to protect your building and enhance your living comforts. Un insulated attic spaces in hot humid climates easily reach 140 and higher so if you have an air conditioning duct with minimal insulation running through the hot attic you can imagine how much of the cooling is lost before it even gets to your rooms. And yet for example our fresno calif franchise abc cooling routinely insulates attics from r 50 to r 60 in home retrofits.

Radiant barrier is a foil that is placed between the attic floor and the insulation. In hot climates the primary purpose of attic or roof ventilation is to expel solar heated hot air from the attic to lessen the building cooling load.