Protect Your Family with Professional Radon Testing Throughout Southern & Central New Hampshire and Maine

Buying a home is one of the largest investments you'll ever make, but there is one invisible hazard that cannot be seen during a standard home inspection—radon gas.

Structure Check LLC provides professional Radon Air Testing throughout Southern and Central New Hampshire and Maine, helping buyers, sellers, homeowners, and real estate professionals understand whether elevated radon levels are present before closing or during home ownership. Using professional electronic continuous radon monitors, we provide accurate testing, detailed reports, and convenient scheduling. Better yet, radon testing can be scheduled at the same time as your home inspection, saving you time and providing one point of contact throughout the inspection process.

Radon is a naturally occurring radioactive gas formed by the natural breakdown of uranium found in rocks and soil. As uranium decays, radon gas is released and can travel through the ground until it reaches the surface or enters a building. Because radon is colorless, odorless, and tasteless, homeowners cannot detect it without specialized testing equipment. A home can have elevated radon levels even though there are no visible signs, unusual odors, or health symptoms affecting its occupants. Radon is found throughout the United States, but certain regions, including much of New Hampshire, have naturally higher concentrations due to local geology. The only way to know the radon level inside a home is to perform a professional radon test.

New Hampshire has some of the highest naturally occurring indoor radon levels in the country. The state's granite bedrock and glacial soils naturally contain uranium-bearing minerals. As these minerals slowly break down over time, radon gas is released into the surrounding soil. Once radon reaches the soil beneath a home, it follows the path of least resistance. Warm air rising through a building creates a slight negative pressure that can draw soil gases, including radon into the structure through small openings in the foundation. High radon levels have been measured throughout Southern and Central New Hampshire in homes of every age, style, and price range. Many homeowners are surprised to learn that neighboring homes can produce completely different radon test results due to differences in construction, foundation conditions, soil characteristics, ventilation, and air pressure.

Radon originates beneath the home, not inside it.

As air pressure changes within the building, radon can enter through numerous openings, including:

• Foundation cracks

• Slab joints

• Expansion joints

• Utility penetrations

• Sump pits

• Crawlspaces

• Floor drains

• Gaps around plumbing and electrical penetrations

Even very small openings can allow measurable amounts of radon to enter a building.

Because radon mixes evenly with indoor air, elevated concentrations may exist throughout finished basements and living areas.

Unfortunately, no. Radon cannot be seen, smelled, or tasted, and there are no immediate symptoms that indicate elevated levels are present. Many homeowners live in homes with elevated radon concentrations for years without knowing it. This is why professional testing is so important. Testing is the only reliable way to determine whether elevated radon levels are present.

Structure Check LLC utilizes professional continuous radon monitoring equipment designed specifically for real estate transactions.

Our testing process includes:

• Placement of a professional electronic radon monitor

• Approximately 48 hours of continuous monitoring

• Verification that testing conditions remained acceptable

• Retrieval of the monitor

• Computer-generated testing report

• Explanation of the results

Professional electronic monitors record radon concentrations continuously throughout the testing period, providing detailed information rather than a single snapshot measurement.

For accurate testing, the EPA recommends maintaining "closed-house conditions."

This generally means:

• Exterior windows remain closed.

• Exterior doors are opened only for normal entry and exit.

• Whole-house fans are not operated.

• Fireplaces should not be used unless they are the home's primary heat source.

Maintaining these conditions helps ensure that the test accurately reflects the home's normal radon exposure during occupied conditions.

Radon levels are measured in picocuries per liter (pCi/L).

The U.S. Environmental Protection Agency recommends considering mitigation when indoor radon concentrations reach 4.0 pCi/L or higher.

Many homeowners also choose to reduce lower radon levels to further decrease long-term exposure.

Regardless of the result, we explain what the numbers mean and answer any questions you may have about the next steps.

Finding elevated radon levels does not necessarily mean you should avoid purchasing the home.

In most cases, elevated radon can be effectively reduced using a professionally installed mitigation system.

The most common mitigation method uses a specialized fan and vent piping to create negative pressure beneath the foundation, safely directing radon gas above the roofline before it enters the home.

Modern mitigation systems are highly effective and can significantly reduce indoor radon concentrations.

Yes. Every home should be tested regardless of:

• Age

• Construction type

• Foundation style

• Neighborhood

• Home value

• Whether neighboring homes tested low

New homes, historic homes, homes with crawlspaces, homes built on slabs, and homes with full basements can all have elevated radon levels.

Because no two homes are identical, one home may have significantly higher radon concentrations than the house next door.

The only reliable way to determine a home's radon level is through professional testing.

False.

New homes can have elevated radon levels just as older homes can.

Every home is different.

Construction methods, soil conditions, ventilation, and foundation openings all influence radon levels.

Homes built on slabs or crawlspaces can also have elevated radon levels.

Radon enters wherever the home contacts the ground.

Radon has no odor, color, or taste.

Testing is the only way to detect it.

A standard home inspection does not include radon testing unless it is specifically requested.

Professional radon testing is performed as a separate service using specialized monitoring equipment.

Coordinating your inspection services saves time and simplifies the home-buying process.

Instead of contacting multiple companies, Structure Check LLC can coordinate many of the services buyers commonly request.

Our bundled services include:

✔ Home Inspection

✔ Radon Air Testing

✔ Private Well Water Testing

✔ Septic Inspection

✔ Sewer Scope Inspection

✔ Wood Destroying Organism (WDO) Inspection

One call schedules it all. You'll receive professional service, detailed digital reports, and the confidence that comes from understanding the condition of one of the largest investments you'll ever make.