Laredo sits in U.S. Department of Energy Climate Zone 2, the second-hottest classification in the country. The DOE recommends attic insulation between R-30 and R-60 for this zone, with a strong emphasis on air sealing before adding any additional insulation. Many Laredo homes built before 2010 fall well short of these targets.
Spray foam is the most effective single-step solution for both air sealing and thermal resistance. Closed-cell spray foam achieves R-6 to R-7 per inch and also acts as a Class II vapor retarder, which is important in South Texas where summer humidity levels frequently exceed 70%. Open-cell foam is a cost-effective alternative for interior applications where moisture exposure is not a primary concern.
Blown-in cellulose or fiberglass is the best choice for existing homes where attic access is limited. It can be installed over existing insulation without demolition, typically achieves R-3.5 to R-4.3 per inch, and the project can usually be completed in a single morning. Many homeowners in Laredo, Rio Bravo, and El Cenizo choose blown-in attic insulation as a first step before considering more comprehensive upgrades.
Regardless of which product you choose, the installation quality determines the result. Gaps, voids, and compressed insulation all reduce effective R-value. Our crews follow manufacturer installation specs for every product we use, and we perform a final walkthrough before leaving the site.