Expanding foam insulation is a method of applying a liquid resin that reacts with air to expand into its surroundings. The resin can be injected into small or large voids to fill the space with a solid foam. The resulting foam can seal gaps and cracks to prevent air from entering into your home. It can be sprayed onto larger areas to provide a thick layer of insulation for resistance to heat transfer.
There are many benefits to this form of insulation over traditional materials. These benefits include ease of installation and durability.
Insulation in the roof and walls is clearly beneficial for its ability to reduce heating and cooling losses and costs. The savings achieved by reducing heat transfer by conduction justifies the cost of adequate insulation.
But don’t forget that convection is another source of heat transfer when air moves between two spaces. Minimizing or controlling losses via convection is desirable but requires more consideration. Adequate outside air is necessary for breathing, and sufficient air transfer is required to ventilate other gases and odors from interior spaces.
Most homes are so leaky that there is plenty of opportunity for air to intrude and be enough for the occupants. However, as structures become more air-tight and interior materials become more synthetic, there is the possibility that the indoor air quality is compromised.
To prevent heat escaping through the attic and the walls of a home fiberglass batts have been a traditional insulation. New advances in insulation offer a better solution that is easy to install and on the budget.
The contemporary best practice is expanding spray foam insulation installation. Foam fills the cavities in between the framing studs of the walls and attic. Spray-on foam expands to fills in air gaps, unlike standard fiberglass insulation, which lets air pass through and around it. Even as a house expands and contracts the foam insulation expands and compresses with it. This prevents warm air from escaping through cracks and spaces.