Insulating an older house without attic access can be challenging, but there are several methods you can consider to improve insulation. Here are some of the best options:
Blow-in insulation: One effective method is to use blow-in insulation, such as cellulose or fiberglass insulation, which can be installed by drilling small holes into the walls. A specialized machine is used to blow the insulation material into the wall cavities, filling the gaps and improving thermal efficiency.
Injection foam insulation: Injection foam insulation is another option for insulating walls without attic access. It involves drilling small holes into the wall, then injecting expanding foam insulation into the cavities. The foam expands to fill the space and provides an effective insulation barrier.
Exterior insulation: If you're willing to invest more in the project, adding exterior insulation to your home can be highly effective. This method involves installing rigid foam insulation boards on the exterior walls of the house, which are then covered with siding or another protective layer. While this option requires professional installation, it offers excellent insulation and can also improve the overall appearance of your home.
Insulated panels: Insulated panels can be installed on the interior walls of your home. These panels consist of a layer of insulation, such as rigid foam, sandwiched between two panels. They can be attached directly to the wall and provide a substantial boost in insulation.
Window and door insulation: Don't forget to address any air leaks around windows and doors. Weatherstripping and caulking can help seal gaps and prevent drafts, improving energy efficiency.
It's worth noting that while these methods can improve insulation, they may require professional assistance, especially if you're not experienced in construction or insulation work. Consulting with a contractor or insulation specialist can help you determine the best approach for your specific situation and ensure the insulation is properly installed.