When it comes to insulating your attic in hot climates, there are a few options to consider.
Fiberglass insulation
is the most common type of insulation used in homes, as it is by far the best for hot climates. Aerosol foam blocks all three types of heat and is highly sought after due to its incredible R-value per inch. Rolled block insulation is another popular option, and if you're looking for a DIY solution, you can find it at Home Depot or Lowes.Fiberglass insulation is the most widely used type of insulation in homes due to its superior performance in hot climates. Aerosol foam blocks all three types of heat and has an impressive R-value per inch. When applying spray foam to the roof cover, there is no need for attic fans, radiant barriers or additional ventilation grilles. The sprayed foam completely fills the cavity, providing a complete air barrier and full insulation.
The Owens Corning system uses blown fiberglass to complete the insulation. In both cases, good air sealing and a total filling insulating cavity are achieved. For attic insulation in hot climates, blown fiberglass is the best choice. It is fireproof, water resistant and does not settle like insulating paper.
Nor does it emit gases such as formaldehyde, as does aerosol insulation foam. Sprayed foam insulation is the ideal type of insulation for hot climates, as it has a much higher R value than other types of insulation. The R value of insulation is a rating of how well it does its job. Best of all, spray foam expands into gaps and crevices that seal air leaks in your home.
If you're looking for a DIY solution, you can find block insulation at Home Depot or Lowes and install it yourself. Focus on the underside of the roof to keep heat out of the attic and not just the attic floor. However, your attic will be much colder than if you had only installed thermal insulation in the hot climate of Austin, Texas. With all these benefits, there's no reason to delay adding or improving your home's attic insulation in a hot climate.
Your local insulation contractor can inspect your existing insulation and make cost-effective recommendations that fit your property, budget and priorities. If you're looking for the most affordable way to bring the attic into compliance with building codes, you can increase the insulation to an R-value of 38, or about 13 inches of molten insulation.
