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It’s 2026, and there are more mold detection dogs working than ever before. Like most industries, there are some excellent teams, some average ones, and some that simply aren’t qualified. If you’re hiring a mold dog, make sure you’re hiring a great team—not just a dog with a title.

When hiring a mold dog, remember this: the dog is only part of the equation. The handler’s knowledge, training, experience, and ability to interpret what the dog is alerting to are just as important.

10 Questions to Ask Before Hiring a Mold Dog Team:

• Who trained your dog?

• Can you provide current certification for the dog?

• How often is the dog re-certified?

• Can I speak with the trainer about the dog and handler’s abilities?

• How long have you and your dog been conducting inspections together?

• Approximately how many inspections have you completed?

• Can you provide references from past clients?

• What does your inspection process look like?

• Do you provide guidance or next steps after the inspection?

• What is your personal background with mold, water damage, building science, or indoor air quality?

It takes the right team to tackle mold issues.

Take your time. Ask questions. Do your research.

Did you know carpet has a life expectancy? It averages 7 years, depending on the grade of the carpet.

Low grade - closer to 3-5 years

High grade/wool - 10-15+ years

Carpet is a sponge. It traps moisture, dust, organic debris. It essentially soaks up everything! 

Carpet has multiple layers:

 •  Carpet fibers (top surface)

 •  Backing/padding underneath

 •  Subfloor below

Even if the top looks dry, moisture can remain trapped in the padding or subfloor, allowing mold to grow out of sight.

Common causes of mold in carpet

 •  Flooding or plumbing leaks

 •  Wet shoes/pet accidents

 •  High indoor humidity

 •  Condensation near windows or exterior walls

 •  Damp basements or crawl spaces

 •  Poor drying after steam cleaning

Signs mold may be in carpet

 •  Musty or earthy odor

 •  Reappearing stains or discoloration

 •  Carpet feels damp or clammy

 •  Increased allergy-like symptoms indoors

 •  Visible spotting (green, black, white, gray)

 •  Padding feels degraded or crunchy

Can you clean it? Yes and no. If it’s wall to wall carpet. No. Cleaning it adds moisture which is a breading ground for mold. If it’s an area rug, yes. Take it to a professional cleaner that specializes in restoration. 

Is your shower making you sick? Rudy can tell you for sure if you have an issue. If Rudy alerts in your shower, you could have moisture behind tile or walls, a failing shower pan or liner, chronic moisture issues, or a plumbing leak.

Once Rudy confirms a shower problem, here are steps you should take to pinpoint the problem:

• Check grout. Do you see any cracks? Water needs just the tiniest of fissures to penetrate.

• Check tiles with a moisture meter. Wait 24 hours after use before running the meter for accurate results. 

• Check the drywall surrounding the shower with the moisture meter as well.

• Look around the shower. Do you see bubbling paint? Swollen trim?

• Do you get mildew in specific areas? No matter how much you clean, it still returns? 

• Do you use the exhaust fan? Is the fan working properly? 

• Is there a musty smell near the shower?

•If the shower is on the first floor and you have a crawl space, get eyes under the shower from the crawl space.

Give us a call if you think you may have mold issues in your bathroom. Rudy is the tool you need to start the process for a mold-free home.

I get this question often: Is Rudy’s health impacted by being a mold dog?

Rest assured, I made sure it was safe before ever putting Rudy in a potentially harmful environment. 

Dogs are built differently than humans. They naturally evolved in environments full of mold and microbes—soil, leaves, dens, and outdoor air all contain fungal spores. Their immune systems and respiratory systems are designed to handle environmental particulates safely while working.

Dogs also have up to 300 million olfactory receptors (compared to about 6 million in humans), and their noses are designed to filter air and trap particles in mucus while continuously clearing scent pathways. When working, they take rapid, short sniffs (5–10 per second), which samples air in controlled bursts rather than deep lung inhalation.

That said, no mammal is completely immune to excessive mold exposure, which is why Rudy has strict safety protocols:

• Limited time in heavily impacted areas

• No unnecessary exposure

• Post-inspection grooming and decontamination

• Regular health monitoring

Rudy’s health and safety will always come first.

When Rudy alerts at an HVAC vent, I always recommend finding an HVAC specialist that will do a complete HVAC forensic assessment. 

Ask for a full duct and airflow assessment including static pressure, duct leakage, and design verification.

Ask if they…

• Do Manual J + Manual D 

• Perform air balancing + duct diagnostics

• Build and modify duct systems (not just clean them)

• Work in crawlspaces/attics where contamination actually originates

What they should be able to do for you:

• Static pressure testing (total external static)

• Identify undersized returns / restricted airflow

• Evaluate duct layout vs design (kinks, compression, poor runs)

• Visual + camera inspection inside ducts

• Inspect for leakage points pulling in dirty air

• Recommend redesign if needed—not just patch fixes

For duct cleaning, you want them to follow the NADCA standards. This means they are using a vacuum system. This will ensure that when the ducts are being cleaned, it’s not going through throughout the house. 

After going through my own battle with mold, I know firsthand how overwhelming, confusing, and expensive it can be. I made the mistakes. I spent the money. And that’s exactly why I don’t leave my clients to figure it out alone.

I stay available long after your inspection—because my goal is simple: help you avoid unnecessary costs, unnecessary steps, and unnecessary stress.

A mold dog can alert us to a concern—but that’s just the starting point. The real work is identifying the source, uncovering the root cause, and mapping out the right path forward. And that doesn’t always mean jumping straight into remediation.

Sometimes, the smartest next step is bringing in the right specialist to fully understand what’s impacted before making any major decisions.

You’re not just getting an inspection—you’re getting guidance, support, and someone in your corner every step of the way.

If Rudy alerts near a fireplace, it’s a good idea to get the chimney fully checked out by an expert.

That basically means checking ash clean-out spots, checking where the chimney meets the roof and the ground floor, and looking for any cracks or gaps where air or moisture could sneak in.

If there’s old mold in the masonry, it should be cleaned out (usually with an acid wash), and the chimney should be checked to make sure it’s still in good shape before sealing everything up.

Finally, the chimney should be coated with a strong, waterproof sealer that keeps water out but still lets the masonry breathe.

All of this helps keep water out of the chimney and stops moisture from spreading into places like crawlspaces or the foundation. 

Just another way to cut off a sneaky source of dampness in your home.