The short answer
How to Check Under the Carpet
To inspect, pull back a corner of the carpet near a wall. Use a flat tool like a putty knife to lift the edge without tearing. Look at the backing and the padding underneath. If you see black, green, or white spots, that is mold growth. Touch the padding; if it is wet or crumbly, the subfloor may be damaged.
You can also use a moisture meter, but you may not have one at home. A simpler test is to tape a clear plastic sheet over the carpet for 24 hours. If condensation forms under the plastic, moisture is rising from below. That condition invites mold. If you are unsure, local water damage pros can do a thorough inspection.
What Causes Mold Under Carpet
Mold needs moisture, warmth, and organic material to grow. Carpet padding and the wood subfloor provide food. Common moisture sources include leaks from pipes, spills that were not dried, or high humidity in the home. A slow leak from a radiator or an air conditioner can soak the padding without being noticed.
Flooding or water damage from a broken appliance can also leave the subfloor wet. If the carpet was cleaned with too much water and not dried properly, mold can develop underneath. Even a pet accident can be enough if left for a while. Finding the source of moisture is the first step to stopping mold.
- Leaking pipes or radiator
- Spills or pet accidents not dried
- High indoor humidity
- Flooding or water damage
- Improper carpet cleaning
Health and Safety Concerns
Mold in the home can affect your health, especially if you have allergies or asthma. Common symptoms include sneezing, coughing, itchy eyes, and headaches. People with weakened immune systems may have more serious reactions. If you feel unwell, see a doctor. Do not ignore symptoms that persist.
When you disturb mold, spores can become airborne. Wear gloves and a mask if you must handle moldy materials. Open windows for ventilation. Avoid touching mold with bare hands. Keep children and pets away from the area until it is cleaned. If the mold covers a large area, the pros should handle the removal.
When to Call the Pros
If you see mold or suspect it under your carpet, act quickly. Mold can spread to the subfloor and walls, causing structural damage. The pros can inspect the area and identify the moisture source. They have equipment to dry the subfloor and remove contaminated materials safely.
The work usually involves removing the carpet and padding, drying the subfloor, and treating the area. In some cases, the subfloor may need repair. The cost depends on the extent of the damage, the materials involved, and the size of the affected area. Contact the pros for an assessment.
Water damage does not wait
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (801) 383-0232Frequently asked questions
Can I just clean the mold myself?
Small patches of mold on hard surfaces can be cleaned with a detergent solution. But mold under carpet often means the padding and subfloor are soaked. Cleaning the surface will not solve the moisture problem. If the mold is widespread or the padding is wet, professional removal is safer.
Will I need to replace the carpet?
Often, yes. Carpet padding is porous and can trap mold spores even after drying. Once mold penetrates the padding, it is hard to remove completely. The carpet itself may also be stained or damaged. The pros can tell you if the materials are salvageable or if replacement is needed.
How do I prevent mold from coming back?
Fix any leaks or moisture sources first. Keep indoor humidity between 30 and 50 percent. Use a dehumidifier in damp rooms. Dry spills immediately and avoid overwatering plants. If you have a flood, dry the area within 48 hours. Regular inspections under carpets can catch problems early.