Knowledge Center · Mold

Cleaning Up Mold: When a Small Patch Is a Homeowner’s Job and When It Isn’t

EPA says that when the moldy area is less than about 10 square feet, roughly a 3 foot by 3 foot patch, in most cases you can handle the cleanup yourself.

Fix the moisture problem first, scrub hard surfaces with detergent and water and dry them completely, and expect to throw away porous items such as carpet and ceiling tiles if they become moldy.

Larger areas, a lot of water damage, sewage or other contaminated water, and health concerns change the answer. EPA points to professionals or to a health professional in those cases.

Published by: H&H Environmental
Sources: Sources checked October 22, 2026
Reading time: 5 min read

Found mold in your home?

Fix the water problem first, or the mold is likely to return.
Check the size. Less than about 10 square feet is the small-patch range EPA describes.
Wear gloves and goggles, consider an N-95 respirator, and avoid touching mold with bare hands.
Do not run the heating or cooling system if you know or suspect it is contaminated with mold.
If sewage or contaminated water was involved, or you have health concerns, stop and get professional or medical advice first.
Call for help with a larger area or a lot of water damage.

Call 845-246-3231 Text us Get help

Fix the Water First

Cleaning mold off a wall that is still getting wet only starts the clock again.

EPA says to fix plumbing leaks and other water problems as soon as possible and to dry all items completely (EPA). It also says that when mold is cleaned up, the moisture source has to be fixed first (EPA). If the water came from a leak or a flood, see structural drying.

How Big Is the Patch?

This is EPA’s general guidance for homeowners. It is not a description of how H&H scopes a job.

EPA’s small-patch range

A moldy area of less than about 10 square feet, roughly a 3 foot by 3 foot patch: in most cases you can handle the cleanup yourself (EPA).

When EPA points elsewhere

A larger area or significant water damage: EPA points to its remediation guidance for schools and commercial buildings (EPA).
Damage caused by sewage or other contaminated water: call in a professional with experience cleaning buildings damaged by contaminated water (EPA).
Health concerns: consult a health professional before starting cleanup (EPA).

Cleaning Hard Surfaces

For hard surfaces, EPA says to scrub the mold off with detergent and water and dry the surface completely. Do not paint or caulk over moldy surfaces, because paint over mold is likely to peel; clean and dry them first (EPA, EPA).

EPA advises wearing gloves and goggles, considering an N-95 respirator, and avoiding touching mold with bare hands. It does not recommend bleach as a routine mold cleanup product. If you do use a disinfectant, ventilate the area, and never mix bleach with ammonia-containing products (EPA).

EPA also notes that dead mold can still cause allergic reactions, so mold has to be removed, not just killed (EPA).

What May Have to Be Thrown Away

EPA says absorbent or porous materials, such as ceiling tiles and carpet, may have to be thrown away if they become moldy. Mold can grow on or fill the empty spaces and crevices of porous materials, so removing it completely may be difficult or impossible (EPA). EPA also notes that mold can hide under carpets and pads (EPA).

The Heating and Cooling System

How to Tell When a Cleanup Is Finished

EPA says a cleanup is not finished while visible mold or moldy odors remain, although staining or cosmetic damage may be left. The water problem has to be fixed as well (EPA).

If You Hire a Contractor

EPA says to make sure the contractor has experience cleaning up mold, to ask for and check references, and to ask them to follow recognized remediation guidelines (EPA).

What H&H Does About Mold

H&H Environmental has operated since 2005 and offers both mold assessment and mold remediation. Mold remediation is the work of removing mold.

On a New York mold project, H&H performs either the mold assessment or the mold remediation — never both on the same project. See mold remediation, mold assessment and mold services.

H&H is based in Saugerties, in Ulster County, and focuses on eight New York counties. Call and tell us where the property is and what you have found, and we will confirm availability.

Frequently asked questions

Can I clean mold myself?

For a small patch, less than about 10 square feet, EPA says in most cases you can (EPA). For larger areas, significant water damage, sewage or contaminated water, EPA points to professionals, and says to consult a health professional first if you have health concerns (EPA).

Should I use bleach on mold?

EPA does not recommend bleach as a routine mold cleanup product. It advises scrubbing hard surfaces with detergent and water and drying them completely, and says never to mix bleach with ammonia-containing products (EPA).

Can I paint over mold?

No. EPA says not to paint or caulk moldy surfaces, because paint over mold is likely to peel. Clean and dry them first (EPA).

Can moldy carpet or ceiling tile be saved?

Often not. EPA says porous materials such as ceiling tiles and carpet may have to be thrown away if they become moldy (EPA).

How do I know the mold is gone?

EPA says visible mold and moldy odors should not be present, although staining may remain, and the water problem has to be fixed (EPA).

Does H&H do mold assessment and remediation on the same project?

No. On a New York mold project, H&H performs either the mold assessment or the mold remediation — never both on the same project.

Is mold remediation covered by insurance?

It depends. Whether a loss is covered depends on your policy and the cause of the damage. We work directly with your insurance carrier and provide documentation and direct billing for covered losses.

Sources

The safety, health and local statements above come from these public sources. This article summarizes them in its own words, so follow the links for the full guidance. Each page was read on October 22, 2026.

U.S. Environmental Protection Agency

Mold Cleanup in Your Home
Fixing water problems and drying; porous materials that may have to be thrown away; cleaning hard surfaces; not running a mold-contaminated HVAC system.
A Brief Guide to Mold, Moisture and Your Home
Why moisture control is mold control; the 24–48 hour window; fixing the water problem; sampling, hidden mold, small and large cleanups, hiring a contractor, when a cleanup is finished.

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