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Will Crawl Space Insulation Make Your House Too Hot?

When it comes to home insulation, one question that many homeowners ask is: “Will crawl space insulation make my house too hot?” As it turns out, the answer is a resounding no.  

Instead of overheating your home, crawl space insulation actually helps control the internal temperature and can save you money on utility bills. At Foundation Support Specialists, we know a thing or two about crawl space repair so let’s go into a little more detail to better explain how that’s possible. 

What is Crawl Space Insulation?

Crawl space insulation is the process of adding insulating materials to the crawl space area of your home. This small, hollow area beneath the first floor is designed to elevate the building from the ground and house important utilities like electrical wiring or air ducts.  

Proper insulation helps keep these systems protected from extreme temperatures and prevents the transfer of heat between the outside environment and the interior of your home. 

The Role of Crawl Space Insulation in Temperature Control

Energy Efficiency

Crawl space insulation is a critical factor in improving your home’s overall energy efficiency. By creating a thermal barrier, insulation prevents the unwanted flow of heat into or out of your home.  

This means that during the hot Texas summer, the insulation will keep the cool air inside your home and the heat outside, preventing your air conditioning system from overworking. 

Uniform Temperature

Crawl space insulation helps your HVAC maintain a uniform temperature throughout your home. Without it, heat or cold can easily enter your home via the crawl space, leading to uncomfortable temperature variations from room to room. 

The Impact on Utility Bills

Insulating your crawl space can lead to substantial savings on your energy bills. As insulation reduces the need for your heating or cooling system to compensate for heat loss or gain, you use less energy, leading to lower monthly bills. 

Choosing the Right Insulation for Your Crawl Space

The effectiveness of crawl space insulation depends on two major factors:

  • 1. The type of insulation used 
  • 2. The quality of the installation

For Texas homes, it’s crucial to choose insulation with a high R-values, which measure the material’s resistance to heat flow.  

Texas is a hot place for most of the year, and high R-value insulation offers superior thermal performance, keeping your home comfortable and energy efficient. 

At FSS, we use ExTremeBloc™ combines highly effective graphite-impregnated insulation with a built-in radiant heat barrier surface. This gives your crawl space walls an unbroken plane of R-11 insulation while sealing your walls from outside moisture and humidity infiltration. 

Hire Foundation Support Specialists

Proper crawl space insulation doesn’t just control your home’s temperature—it also improves energy efficiency and saves you money. At Foundation Support Specialists, we are experts in crawl space insulation, ensuring your home stays comfortable throughout the year, regardless of the weather outside. 

Contact us today for a professional assessment and experience the peace of mind that comes with knowing your home’s comfort and energy efficiency are in capable hands. Your home’s comfort is our priority. Don’t wait—reach out to Foundation Support Specialists today to schedule your free inspection

Crawl Space Insulation


If your home maintains a uniform temperature, your HVAC system isn’t overworking, and you notice a reduction in your energy bills, it’s likely that your crawl space insulation is effective. However, if you’re noticing drafts, uneven temperatures in different rooms, or a sudden spike in your energy bills, it might be time to have your insulation checked by professionals like the team at Foundation Support Specialists. 

The R-value is a measure of an insulation material’s resistance to heat flow. A high R-value means the insulation effectively blocks heat transfer, enhancing the energy efficiency of your home. When choosing insulation for your crawl space, opting for materials with high R-values, like the ExTremeBloc™ insulation we use at Foundation Support Specialists, ensures optimal thermal performance and comfort. 

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