Mold Under Carpet? Signs, Prevention, & Removal

Mold under your carpet is a silent and often overlooked issue that can wreak havoc to your home’s integrity and your health. It can continually grow undetected, posing significant health risks and causing an unpleasant, “musty” odor in the process.

We’ll cover several clear signs indicating mold growth beneath your carpets, as well as effective prevention measures and removal techniques to keep your indoor environment safe and clean. Ultimately, any significant mold damage – especially that of black mold, should always be handled by a professional mold remediation service

Signs of Mold Growth Under Carpet

black mold growth under the carpet

Mold under carpet or carpeting may not always be visible, but signs like a musty odor, discoloration or staining on the carpet, and allergy symptoms can indicate its presence.

Musty Odor

A musty odor is one of the primary signs that mold may be lurking beneath your carpet. This unpleasant smell, often described as “damp” or “earthy,” occurs when mold breaks down organic materials and releases volatile organic compounds (VOCs) into the air.

If you notice a persistent musty odor in a room with carpeting despite regular cleaning and proper ventilation, there’s a possibility that mold is growing somewhere in the house.

It is essential to take action immediately since prolonged exposure to mold spores can lead to allergic reactions, respiratory issues, and impaired immune health – all posing potential health risks for occupants. This is especially true for those with autoimmune conditions

Discoloration and Staining

Discoloration or staining on your carpet should never be ignored, as this may indicate the presence of mold growth. This unsightly issue often appears in various shades of black, green, or even yellow and can spread rapidly if left untreated. 

Spores just need moisture and a damp environment to proliferate – and the dark underpinning of the carpet against hardwood is an ideal environment. 

A small water leak behind your washing machine could lead to excess moisture seeping into the flooring below. A carpet provides an opportune environment for mold spores to hide. 

Many people experience allergic reactions when exposed to mold spores, such as sneezing, runny nose, red eyes and skin rash; others may suffer more severe symptoms like shortness of breath or chest tightness.

Allergy Symptoms

Allergies are a common indicator of mold growth under carpets, as exposure to these hidden culprits can result in uncomfortable health issues that may not be easy to pinpoint – especially if you don’t typically experience symptoms while inside your home. 

Not all molds are “toxic” black mold, but can still result in respiratory issues. 

A family suffering from persistent allergy-like symptoms could be dealing with an undetected mold problem beneath their flooring. As they walk on the carpet daily and disturb the affected area, mold spores are released into the air. Mold spores are most dangerous when they become airborne, as they can easily be inhaled or respirated, even if they can’t be seen. 

Prevention and Removal of Mold Under Carpeting 

To prevent mold growth under carpets, control humidity levels and promptly address any water damage; in case of mold growth, remove the affected carpet and its padding while wearing protective gear and properly clean all surfaces to avoid further damage.

If damage is extensive or you’re concerned you might be dealing with black mold, you’ll want to contact us at Allphase Restoration. We have extensive experience identifying moisture problems, and removing contaminated materials like drywall or carpeting. 

We always conduct a free moisture assessment and mold damage assessment. Specialized tools like professional HEPA filters and thermal imaging devices are often required to pinpoint all mold growth, and ensure its removal. 

Control Humidity Levels

mold growth under the carpet because of humidity levels

To prevent any mold growth under carpet or carpeting, controlling humidity levels is key. Excess moisture in the air can make it easier for mold spores to grow and multiply, leading to a perfect indoor environment for fungus – especially with our seasonal warm weather.

One effective way to control humidity is by installing a dehumidifier in the affected room.

Regularly monitoring the humidity levels with a hygrometer or using an HVAC system that measures and adjusts relative humidity can help prevent excess moisture accumulation under carpets.

If you notice high relative humidity levels above 60% in your home, contact us to assess and repair any potential leaks, while increasing ventilation or circulating air more frequently throughout your home through fans or open windows.

Address Water Damage

One of the key factors in preventing mold growth under carpets is promptly addressing pre-existing water damage. Water damage can occur due to various reasons, such as flooding or leaks from plumbing systems.

When water intrudes your home, it’s essential to act quickly and remove all wet items like carpets, drywall, insulation, ceiling tiles or any other surfaces that have been affected. This often requires professional assistance. 

To prevent further damage and potential mold growth, it’s important to completely dry out the wet areas within 24-48 hours and replace affected materials.

It’s vital to identify the source of water intrusion and fix it right away. Suppose the water exposure is caused by a burst pipe or heavy rains; you should shut off your main water valve immediately until professional help can address structural damage. 


Any mold growth under carpets or carpeting is a serious issue that can lead to health problems and structural damage if not addressed promptly. Signs of mold under carpet include musty odors, discoloration or staining, and consistent allergy symptoms. Regular carpet cleaning and things like rubber slab carpet padding can help prevent occurrence, but don’t address the root issue.

Prevention measures such as controlling humidity levels and addressing water damage quickly are crucial in avoiding mold growth for homeowners. If you suspect mold on your carpet, act quickly and contact us today for the best mold restoration services! While a little mold under carpeting may seem inconsequential, it often signals a bigger issue that needs to be fixed. 

Read Our Recent Posts