3 Big, Important Reasons Why You Should Spray Foam Your Crawl Space (And How To Do It)

It’s not an area of your home you spend time in every day, but it’s still one of the most important rooms in your home. It’s your crawl space! If not properly insulated, it can cause a lot of problems in your home and also affect your home’s resale value! 

Here’s what you need to know about how to spray foam a crawl space:

This diagram demonstrates how to spray foam a crawl space. Crawl space insulation is helpful in minimizing floorboard creaks, creating a temperature barrier and minimizing musty odors.

Spray foam will minimize floor-board creaks

Have you ever tried to sneak to the kitchen for a snack at night and the floorboard squeak under you? When you apply a high-density spray foam product to the ceiling of your crawlspace this can help to minimize (and in most cases completely eliminate) the squeaking so you can get that piece of chocolate cake at 1 am without being discovered!

Spray foam will create a temperature/air barrier

Your crawl space is the coldest, most humid area of your home. Spray foam applied to the ceiling of your crawl space acts as a thermal, air, and gas barrier between this area and your main living area above. The foam we use at Greer Spray Foam is a high-quality, environmentally friendly closed-cell spray foam product that provides insulation and an impermeable barrier for moisture and air without the need for a separate vapour barrier. 

Separating your crawl space and main living areas with insulating spray foam will help keep your heating bill down as cold crawl space air won’t seep into the warmer areas of your home. This will mean you can put your slippers away, even in the winter months!

Spray foam will create a smell barrier 

The air in crawl spaces is often moist and dank-smelling. You don’t want the main living areas of your home to smell like this too! Using spray foam insulating material to create a barrier on the ceiling of your crawl space will prevent stinky crawl space air from penetrating through the floorboards into your home. Our purple spray foam is extremely effective at reducing air movement (and the smells it carries) through openings, cracks, and crevices. 

Can I spray foam my crawlspace myself?

In the age of being able to Google nearly any home DIY project you need, this is one of those projects that if you want it done right and safely, it’s best left to the professionals (ideally, professionals with proper safety and application equipment, so can ensure every detail is done quickly and efficiently.) Without proper safety equipment and technique, the foam can be hazardous. 

(Don’t worry though! Once the foam has cured it’s no longer a hazard for you and your family)

How to spray foam a crawlspace

When people ask us how to spray foam a crawl space, they ask whether they should spray foam the walls or just the ceiling. While it’s not uncommon to spray the walls, it comes with an additional set of considerations. Cold and smells can still seep through your crawlspace floor (yes even if the floor is concrete). 

Insulating your crawl space walls may also require proper ventilation systems installed in your space to prevent mold growth if humidity gets trapped there. Your better bet, and what we recommend for most clients, is to spray from the ceilings of your crawlspace. Let your crawlspace stay cooler, while the main living area of your home is insulated from the crawlspace. 

Insulating the ceilings of your crawlspace can save you up to 30% on your heating bill. Ask us about our crawl space insulation services to have your home professionally insulated with spray foam. Our foam is clean, environmentally friendly, and can provide you significant energy savings on your next heating bill! We’ll crawl through your crawl space so you don’t have to!

Interested in getting your crawl space insulated? Use our contact form to tell us about your crawl space insulating needs or concerns. We’ll send an estimator (with protective PPE to keep you and our team safe) to your home to perform a quick on-site inspection and provide you with a quote.