Installed Energy Blog

7 Questions to Ask Before Hiring a Residential Geothermal Drilling Contractor

Written by Supplied Energy | Dec 15, 2025, 10:33:33 PM

Installing a geothermal heating and cooling system is a significant investment, and much of its long-term performance depends on what's underground. While homeowners often focus on the heat pump itself, the ground loop installation is just as important.

 

 

 

understanding the difference between Geothermal and traditional drilling

 

Understanding the difference between Geothermal vs. Traditional Drilling is a great first step in helping a homeowner better understand what questions to ask when looking for a drilling contractor. 

 

Similarities

  • Use boreholes to extract a resource
  • Require grouting
  • Use mud or water to move rock and soil during drilling

Major Differences

  • Purposes: Geothermal drilling creates a pathway for heat to be exchanged without using water resources from the boreholes. Traditional drilling, however, requires an aquifer that takes water for irrigation.
  • Borehole Depth: Geothermal boreholes extract heat by going hundreds of feet deep into the earth’s geology, and traditional drilling boreholes have varying depths depending on local water resources.
  • Geological Changes: Geothermal drilling requires expert knowledge about the region’s local geology. This is because the drilling often involves harder, hotter, and more fractured rock formations that are special to each location.
  • Equipment: Geothermal ground loops need specialized tools and use different techniques from traditional drilling. Grouting, thermal conductivity, and environmental protection are all priorities when drilling for geothermal wells.

 

 

 

7 questions to ask before hiring a residential geothermal drilling contractor

 

Before choosing a geothermal drilling contractor, ask these seven questions to ensure your system is built to last.

 

 

1. How Much Experience Do You Have with residential geothermal drilling?

 

Not all drilling contractors specialize in geothermal.

 

Look for a company that regularly installs vertical geothermal loops for residential homes—not just water wells or general drilling projects.

 

Questions to ask:

  • How many geothermal systems have you drilled for?
  • How many residential projects do you complete each year?
  • Do you primarily install vertical geothermal loops?
  • What certifications do you have?

Why it matters: Experience helps prevent costly mistakes and keeps your project on schedule. Not only do we have real-world experience, we've completed courses with the Geothermal Alliance of Illinois and are certified loop installation contractors.

 

 

 

2. Do you understand the geology in my area?

 

Illinois has a wide range of subsurface conditions.

 

A contractor familiar with local geology will know how to handle varying soil conditions, rock formations, groundwater, and drilling challenges that may affect your project.

 

Questions to ask:

  • Have you completed projects nearby?
  • What drilling conditions are common in my area?
  • How do local conditions affect installation?

 

 

3. what type of equipment do you use?

 

Residential geothermal drilling requires specialized drilling rigs designed to access confined residential lots while still reaching depths of 150–500 feet or more.

 

ask About:

  • Drill rigs
  • Safety equipment
  • Site restoration equipment
  • Grouting equipment

Proper equipment helps minimize disruption to your property.

 

 

 

4. Do you install and grout the ground loops?

 

Drilling the borehole is only part of the process.

 

The contractor should also ensure the geothermal loop is properly installed and grouted according to industry best practices.

 

Questions to ask:

  • Do you install the loop?
  • Who performs the grouting?
  • What grout materials do you use?
  • How is the loop pressure tested?

These steps directly impact system performance and longevity.

 

 

5. are you fully licensed and insured?

 

Always verify that your contractor carries appropriate insurance and follows applicable state and local requirements.

 

ask For:

  • General liability insurance
  • Workers' compensation coverage
  • References from previous geothermal projects

A reputable contractor will gladly provide this information.

 

 

 

6. what will my property look like after the job?

 

Homeowners are often surprised by how little disturbance is left after a properly managed geothermal installation.

 

Questions to ask:

  • How much of my yard will be affected?
  • Will landscaping need restoration?
  • How long does drilling typically take?
  • What cleanup is included?

Understanding expectations ahead of time can help you plan accordingly.

 

 

 

7. will you coordinate with my geothermal installer?

 

A successful geothermal project requires close coordination between the drilling contractor and the HVAC installer.

 

Your drilling contractor should communicate with the installing contractor to ensure:

  • Bore depths match the design.
  • Loop locations are correct.
  • The project stays on schedule.
  • Installation proceeds smoothly.

Working with a contractor experienced in residential geothermal projects can make the entire process easier for everyone involved.

 

 

 

Why homeowners choose installed energy

 

At Installed Energy, we specialize in vertical geothermal drilling throughout Illinois. Our team works with homeowners, HVAC contractors, and geothermal installers to provide reliable drilling, loop installation, and grouting services for residential geothermal systems.

 

Whether you're building a new home or replacing an existing HVAC system with geothermal, we have the experience and equipment to help your project get off to the right start.

 

Ready to discuss your geothermal project? Contact Installed Energy today to learn more about our residential geothermal drilling services.

 

 

 
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