When you start a remodeling project, you never know what you might find. Mold could lurk behind drywall, under sinks, inside shower walls, under carpeting, or above ceilings.
Dangers of Mold
Mold can cause a variety of health problems, including asthma, allergies and other chronic respiratory illnesses. Because it often grows undetected, homeowners may not realize there is a problem until work begins.
When mold spores become airborne they can remain so for hours and spread throughout the house. That increases the risk of acute allergic reactions and can be life-threatening for people with severe mold allergies or respiratory conditions.
How to Prepare for Mold
- Protective clothing such as a Tyvek suit, rubber gloves, a dust mask, and goggles.
- HEPA vacuum for mold spore removal.
- Heavy mil plastic to encase contaminated materials before you move them outside.
- Spray bottle with a solution of one part bleach to nine parts water or another mold-killing solution.
For information about insurance options related to mold cleanup and remediation, see Mold insurance overview.
How to Remove Mold
- Secure the affected area to prevent cross-contamination.
- Turn off the HVAC system to prevent duct-system contamination and halt the spread of mold.
- Ask the homeowners and occupants to stay away from the contaminated area.
- Determine the scope of the problem and whether you can handle it alone or need additional help.
- Remove moldy, salvageable materials when possible.
- Treat moldy areas that cannot be removed with appropriate cleaning or biocide products.
- Repair the source of moisture that allowed the mold to grow.
- Verify that mold is removed and consider an air-quality test before finishing the remodeling project.
Call in a Professional
Some mold problems extend beyond typical remediation steps and are best handled by a licensed remediation specialist. If the homeowner or any occupant has an allergic reaction or respiratory distress, stop work and call a professional. You may also want to review options for coverage such as Mold Abatement Insurance, or talk to an agent about risk and policy details.
What to do if you Cause Mold
If work you performed leads to mold growth, your contractor liability or umbrella policy may cover cleanup and related damages that are your responsibility. Document the situation and notify the homeowner and your insurer promptly.
Mold is a serious concern during remodeling. Take precautions, follow containment and cleanup steps, and get professional help when the problem is beyond your expertise.
Frequently Asked Questions
How large does a mold problem have to be before I call a professional?
If the affected area is larger than about 10 square feet, or if mold has spread to HVAC systems or structural components, hire a remediation professional.
Can I remove mold myself with household cleaners?
Small areas of mold on non-porous surfaces can sometimes be cleaned with appropriate products, but porous materials often require removal and replacement.
Will insurance always cover mold cleanup?
Coverage depends on the policy and the source of the mold; sudden accidental causes are more likely to be covered than long-term neglect or unresolved leaks.
What personal protective equipment should I use when removing mold?
Use a proper respirator or N95 mask, gloves, eye protection, and disposable coveralls to minimize exposure to spores.