Radon Testing · Invisible Gas, Real Risk

Certified Radon Testing for Delaware Homes, From Basements to Beach Builds.

Radon Certified · Short-Term Real Estate Testing

Radon is a colorless, odorless gas that can build up inside homes—whether they’re brand-new construction or decades old. National Home Guard offers professional radon measurements that fit your inspection timeline and give families clear, actionable results.

Certified radon analysis Real estate–friendly test windows Clear mitigation guidance

Short-term radon testing coordinated with your home inspection whenever possible.
Digital results with easy-to-understand charts and recommended next steps.
Guidance on when mitigation is advised and what typical systems look like.
Service across slab-on-grade, basements and crawlspace homes in Delaware.

Serving buyers, sellers and agents in Sussex, Kent & New Castle County—including coastal communities where radon is often overlooked.

Add Radon Testing to Your Inspection → Questions about your area’s risk? Call (302) 555-1234.

Why Radon Testing Matters in Delaware

An Invisible Gas That Doesn’t Care How New or Beautiful the Home Is.

Radon forms naturally in the ground and can enter homes through slabs, crawlspaces and basements. You can’t see or smell it—testing is the only way to know if it’s present at elevated levels.

Levels can vary from home to home—even on the same street or in the same community.
New construction is not immune; tightly sealed homes can actually hold radon in.
Mitigation systems are common and often simple compared to the peace of mind they bring.
Some buyers and lenders strongly prefer documented radon results before closing.

National Home Guard partners with certified radon professionals to help Delaware families make informed decisions—not to sell mitigation work.

How Radon Testing Works With Your Inspection

Simple, Timed for Real Estate & Designed for Clear Decisions.

We use short-term testing methods that fit into typical Delaware contract windows, capturing enough data for buyers, sellers and lenders to make informed choices.

Step One

Add Radon at Booking

When you schedule your home inspection online, simply add radon testing as an additional service. We’ll coordinate equipment drop-off and pick-up around that timeline.

No separate vendor to manage

Step Two

Short-Term Test Window

A small testing device runs continuously for a set period—often 48–72 hours—while the home remains in “closed-house” conditions whenever possible.

Designed for real estate timelines

Step Three

Results & Recommendations

You’ll receive a digital radon report with average levels, charts and clear recommendations. If mitigation is suggested, we explain typical next steps.

Plain-language explanation included

Need standalone radon testing outside of an inspection? We can often accommodate that too—just let us know when you reach out.

When We Recommend Radon Testing

A Smart Add-On for Most Delaware Purchases—Especially These.

Radon testing is recommended for any home, but it’s particularly important in certain situations. Here are a few where we strongly suggest adding it to your inspection:

🏠

Homes With Basements or Finished Lower Levels

Spaces where families spend time—basements, playrooms, guest suites—are where radon levels matter most. Testing helps you understand the air you’re actually breathing.

🧱

New Builds & Tight, Energy-Efficient Homes

Modern construction can hold radon in more effectively than older, drafty homes. Even brand-new houses benefit from baseline testing.

📍

Any Purchase Where You Want Full Peace of Mind

If you’re already investing in a full home inspection, radon testing is a relatively small add-on that can answer a big “what if?” question for your family.

Unsure whether your specific property is a strong candidate for testing? We’re happy to talk through your plans, loan type and location to help you decide.

Radon Testing FAQs

Questions Delaware Buyers, Sellers & Agents Ask Most.

Radon can sound intimidating if you’re hearing about it for the first time. These answers help put the process—and the solutions—in perspective.

Is radon only a problem in older homes? +

No. Radon comes from the soil, not from building materials. It can affect homes of any age, style or price point—including new construction. Tighter, energy-efficient homes can sometimes hold radon in more effectively, which is why testing is recommended across the board.

What happens if my test shows elevated radon levels? +

Elevated levels don’t mean you need to walk away from the home. It usually means the property is a candidate for a mitigation system—a relatively common upgrade that helps vent radon from beneath the house before it enters living spaces. Your report will explain next steps, and your agent can help negotiate as needed.

Can windows be open during the test? +

For short-term real estate tests, “closed-house” conditions are ideal. That doesn’t mean you can’t enter or exit the home—but it does mean exterior doors and windows should stay closed as much as possible so the results reflect typical occupied conditions.

Does every lender require radon testing? +

Requirements vary by loan type and lender. Even when it isn’t mandatory, many buyers choose to test for their own peace of mind. If your lender or loan program has specific rules, your agent can usually confirm those quickly.

Which Delaware areas do you cover for radon testing? +

We currently serve Sussex County (Rehoboth, Lewes, Milton, Georgetown, Millsboro, Bethany, Fenwick), Kent County (Dover, Camden-Wyoming, Smyrna) and New Castle County (Middletown, Newark, Wilmington and surrounding communities). If you’re not sure whether a property is in our coverage area, just reach out.