Which is the best method for placing insulation in an existing home?

The use of loose-fill insulation is often considered the best method for placing insulation in an existing home due to its flexibility and ease of installation. Loose-fill insulation, which consists of small particles of insulation material such as cellulose, fiberglass, or mineral wool, can easily be added to existing wall cavities and attics without needing to remove or disturb existing materials. This makes it ideal for retrofitting and improving the energy efficiency of older homes.

In addition, loose-fill insulation can effectively conform to the irregular shapes and spaces found in existing construction, providing a more thorough coverage and reducing air gaps that can lead to energy loss. Its application requires specific equipment, often a blowing machine, which can help achieve an even distribution throughout the area being insulated.

Using other types of insulation, such as rigid board, batt insulation, or spray foam, can present challenges in existing homes. Rigid board insulation is typically used for new construction or certain applications like foundation walls, where continuous and uniform insulation is required. Batt insulation may not fit well within existing wall cavities due to their variability, and installing it often requires removing drywall or other barriers, which is more labor-intensive. Spray foam, while excellent for air sealing and insulation, may also necessitate professional installation and can be more