Best Insulation for Crawl Space Under House

The best insulator for any crawl space is the closed-cell spray foam from Star Spray Foam. It creates an impenetrable and airtight seal against the elements, seals out cold spots that contribute to drafts, reduces energy, and keeps humidity at a lower level. Unlike fiberglass, this spray foam will not sag with time; it is for the long run only.

It is also an important ingredient in fighting indoor air pollution, as it forms a good barrier to allergies and pests. In warm, moist climates such as New Orleans, spray foam insulation is the best to protect your crawl space.

What Is Insulation for Crawl Space?

This insulation seals your crawl space and improves the house’s energy efficiency, comfort, and structure. Temperatures are stabilized, reducing moisture levels inside the home, where mold and even wood rot tend to become big issues; fewer energy bills happen. Fiberglass batts seem cheap but absorb moisture and often allow air seepage.

Consider spray foam insulation for more efficient efficiency. It may cost more upfront, but the insulation and air sealing are unmatched, cutting through drafts and condensation in this humid environment as in New Orleans.

Why Insulating Your Crawl Space Matters

Crawl spaces are prone to temperature swings, moisture buildup, and even pests. Without proper insulation, these issues can affect your home’s overall comfort and energy bills. Insulation creates a barrier that keeps the air inside your home at a consistent temperature while reducing drafts and moisture from entering.

Types of Insulation for Crawl Spaces

Making the right decision about insulation in your crawl space is of course determined by your priority on control of moisture, energy efficiency, and long-term durability. Each type of insulation has its advantages and performs better under certain conditions than others.

Here’s a detailed look at the most commonly used materials:

Fiberglass Insulation

Fiberglass batt insulation is also quite popular in crawl spaces because of its affordability and ease of installation between floor joists. In humid climates such as New Orleans, though, it has several disadvantages, like absorbing moisture and reducing the efficiency of its insulating capacity.

It doesn’t fit very snugly into cavities and so leaves gaps, which can break the integrity of the vapor barrier. Although it is the cheapest option in the beginning, in wet conditions, its performance might deteriorate.

Spray Foam Insulation

It has proven to be energy efficient and lasts much longer than fiberglass, offering a completely tight seal, excluding drafts and moisture. While spray foam might initially be costlier, long term it offers huge savings.

With so many companies having done home insulations, the method of using spray foam has shown promise and effectiveness. Homeowners desirous of reducing their energy expenditure as well as ensuring reduced maintenance costs in the crawl space, find the long-term approach to take.

Rigid Foam Board Insulation

Rigid foam boards are wonderful for crawl spaces. Graphite is infused, which raises its R-value by 24% from that of traditional EPS foam boards. Moisture-resistant, it has a clean appearance. Such boards are fine with solutions, sealing off the crawl space so that the space stays conditioned and regulated about moisture.

Reflective Foil Insulation

Reflective foil insulation reflects radiant heat and does not absorb it; hence, it is very effective for heat transfer reduction in hot, humid climates. It may work well with other types of insulation if installed correctly to further enhance energy efficiency. It is not typically used alone because it is less effective in very cold climates.

Factors to Consider When Choosing Insulation

1. Crawl Space Type

   • Vented: Open to outdoor air. Insulate the floor above the crawl space.
   • Unvented: Closed off from outdoor air. Insulate the walls instead.

2. Moisture Levels

   If your crawl space is damp, choose moisture-resistant insulation like rigid foam or spray foam.

3. Climate

   Homes in colder climates benefit more from insulation that creates a tight seal, like spray foam or encapsulation systems.

4. Budget

   Fiberglass is the most affordable option, while spray foam and encapsulation can be more expensive but offer long-term benefits.

Get the Best Value From Your Insulation Dollars

Proper selection of crawl space insulation helps in energy-saving, improving comfort, and preservation of the home. The amount of your spending and climate vary according to different homes and geographical locations.

Excellent insulation results in saving bills by minimizing the probability of moisture. To maximize returns on an insulation investment, contact us today.