In new homes, builders can install rigid foam boards under the floor before pouring the slab. This is a great choice if you are building a new home because it helps regulate the temperature of your basement year round.
Basement Wall Insulation
In many houses, basement wall insulation isn’t done because it is thought that it isn’t necessary with floor and ceiling insulation. This is incorrect. Wall insulation in your basement is actually the most important factor in keeping your home as energy efficient as possible. *If you have wall insulation, you don’t even need ceiling insulation in your basement, since the basement is insulated and the airflow between the basement and the rest of the house doesn’t need to be filtered.* The most efficient way to insulate your basement is installing rigid foam boards onto the walls of the basement, along with sealing any cracks and doorways in the basement.
If you are planning on finishing your basement and want to make the flooring more comfortable, installing floor insulation is the right choice. To do this rigid foam insulation boards will be laid between the cement floor and the flooring you are installing. This will cause the finished flooring to be warmer and more tolerable to walk on, especially during the cold months.