The Truth About Insulating Crawl Spaces

When you think about insulation, your mind probably jumps to the attic—or maybe your walls. But what about the space under your home?

If you have a crawl space, ignoring it could be costing you more than you think. At Metro NY Insulation, we’ve worked with hundreds of homeowners across New Jersey and Westchester County who were shocked to discover just how much energy (and money) was slipping through the floors.

Here’s the truth: A poorly insulated crawl space can wreck your comfort year-round. Let’s break it down and talk about what really matters.

Why Insulating Crawl Spaces Matters (Yes, Even in Summer)

Most people think crawl space insulation is only important in the winter—but it’s just as crucial in the summer months.

Without insulation, crawl spaces can act like a giant sponge for heat and humidity, especially when outside air leaks in. That hot, damp air travels up into your floors and living spaces, making your air conditioning work harder—and driving up your energy bills.

It’s a silent problem that leads to:

• Hot or cold floors, depending on the season

• Higher energy use (and higher bills)

• Mold and moisture buildup

• Musty odors and poor air quality

• Pest problems

If your floors are always cold in winter or sticky-hot in summer, your crawl space might be trying to tell you something.

What Proper Crawl Space Insulation Looks Like

At Metro NY Insulation, we believe in doing things the right way—the first time. That means more than just stuffing some fiberglass between your joists and hoping for the best.

We use high-performance solutions like closed-cell spray foam and dense-packed cellulose, depending on your home’s layout and needs.

Spray Foam Insulation – Ideal for air sealing and moisture control. It bonds to surfaces and acts as both insulation and vapor barrier.
Encapsulation Options – For damp crawl spaces, we also offer encapsulation systems with vapor barriers and drainage, giving your home a sealed, conditioned space that’s healthier and more efficient.

These methods:

• Create a thermal and air barrier

• Prevent moisture and mold growth

• Help HVAC systems run more efficiently

• Improve indoor comfort and air quality

How Do I Know If My Crawl Space Needs Insulation?

Here are some telltale signs your crawl space might need an upgrade:

🚩 You feel hot or cold spots in your home
🚩 Your floors are freezing in winter or sticky in summer
🚩 You smell mustiness near the base of your home
🚩 There are signs of condensation or mildew
🚩 You notice pests or insects sneaking in

If any of this sounds familiar, we can help. One quick inspection could reveal a lot about what’s really going on below your feet.