Wall Re-Insulation Costs
Re-insulating walls typically costs $2 to $5 per square foot when including removal of old insulation and installation of new material. For a typical 2,000 square foot home in Franklin, TN, expect total costs of $4,000-$12,000 depending on the insulation type and approach chosen.
The cost depends heavily on whether you need to remove drywall for access or can use injection methods through small holes. Injection foam re-insulation through existing walls costs $2.50-$4.00 per square foot, while full drywall removal with spray foam re-insulation runs $3.50-$5.00 per square foot plus drywall repair costs.
When Re-Insulation Is Necessary
Wall re-insulation becomes necessary when existing insulation has deteriorated, settled, or been damaged by moisture. Signs that your walls need re-insulation include noticeable temperature differences between walls and room centers, visible condensation on interior walls, and persistently high energy bills despite other efficiency improvements.
Older homes in the Franklin area, particularly those built before the 1980s, often have minimal or no wall insulation. Even homes from the 1990s and 2000s may have fiberglass that has settled or compressed over time. Re-insulating with modern spray foam can transform the comfort and efficiency of these homes.
Re-Insulation Methods
The least invasive method involves drilling small holes in each wall cavity and injecting foam or dense-pack cellulose. This approach minimizes disruption and costs but may not achieve the same level of air sealing as open-cavity spray foam. The holes are patched and can be painted to match.
For homes undergoing renovation, removing drywall and applying spray foam insulation to the exposed cavities provides the best results. This is the ideal opportunity to achieve maximum insulation performance, as the installer can ensure complete coverage and proper air sealing. BST Spray Foam of Franklin can help you determine the best approach for your situation.