Can You Use Spray Foam Insulation In Existing Walls

Spray foam is a type of insulation that expands after you spray.

Can you use spray foam insulation in existing walls.

Spray foam insulation is made of two chemicals that are combined to create a foam. A cautionary tale from my own home. Expanding foam insulation has increased in popularity as the manufacturers have praised its uses and abilities and its applications have reached to include cavity walls. Yes you can use expanding foam insulation in cavity walls.

If you are thinking about putting it in the walls of an existing home read this first. Do you need better insulation but can t figure out how to do it without making a huge mess. Installing spray foam in an existing finished wall is even trickier and when it can be done at all it s costlier than installing foam in new unfinished construction. Insulating vertical closed walls with existing fiberglass used to be impossible.

It protects the lining of your house and can even assist in the heating and cooling of your house during those unbearably cold or hot days. And you don t need someone drilling ugly holes on the outside. The foam expands and seals deterring moisture which can create mold and pests from eating through your walls. It can be sprayed or injected into walls and it expands to fill the wall cavity even the smallest crevices and eventually hardens.

One of the high tech insulation products being utilized these days is a foam spray product called icynene which is a foam that starts as two liquid components a and b if you will that are heated up and sent through two hoses and meet at a tip of a gun where the magic begins. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. This type of insulation can be more expensive than loose fill insulation. But it depends on what kind.

With foam it green you don t need to destroy your inner walls trying to remove the existing fiberglass.