If you want to create a comfortable house, one great idea is to create an air seal in the crawl space. However, if you want it to be more efficient, should you insulate the ceiling or the walls of your crawl space? 

 

There are several reasons why particular crawl space spray foam insulation Birmingham AL might be preferred over the other. It all comes down to what is inside your crawlspace.  

How to Spray Foam a Crawl Space 

First of all, you have to first get rid of the old insulation if you want to add new spray foam insulation to your crawl space. The old stuff has to go. It does not matter if the walls or the ceiling are being sprayed.  

It is probably wet, nasty, and dirty. In addition to that, it simply gets in the way for proper installation.  

An excellent contractor will get rid of that old insulation out of the crawl space. This will help create a clean and nice surface for the new spray foam to adhere to.  

After this, it simply comes down to whether the walls or the ceiling will be sprayed. Of course, that decision is made depending on whether or not there are ductworks or mechanicals in your crawlspace.  

Insulating the Ceiling of Your Crawl Space Using Spray Foam 

The professional spray foam contractor might suggest insulating the ceiling if there are no ductworks or mechanicals in the crawl space.  

For those who don’t know, the prep work required for this method is almost the same as spraying the walls of your crawl space. However, the contractor usually will not use plastic.  

As we’ve mentioned, the old insulation will be eliminated and a hose will be used to clean the crawl space. After the crawl space is cleaned, the installation professionals will spray the foam on the floor’s underside.  

This technique will air seal the crawl space. It will separate your crawl space from the rest of your house. Because of this, your crawl space will not have the same temperature as the rest of your house since it will be outside the property envelope. However, it will not enable cold air anymore to move through it and into your living space.  

Insulating the Walls of Your Crawl Space Using Spray Foam 

A professional contractor will suggest placing plastic down on the floor and spraying the walls if there are mechanicals or ductwork running through your crawl space.  

First of all, they first have to get rid of the old insulation. Once it is done, the installation professionals will clean the area using a hose. After that, the professional installer will place a layer of plaster on the floor of your crawl space and up the walls. Next, they’ll apply the spray foam to the walls.  

This technique will seal off your home’s foundation and enables the crawl space to have similar temperature as the rest of your house. This is extremely crucial, especially if your ducts are located inside your crawl space.