Why is there mold inside my toilet tank?

Thursday, June 21, 2018

We see this problem more often in homes that have been empty and closed up for a months waiting for a buyer, or bathrooms that are rarely used. Mold requires three things to start growing: warmth, moisture, and organic material. An empty house, with the air conditioner turned off or set at 80º F in the summer, will provide the heat. 

    Next, the chlorination in the water—that would ordinarily discourage mold growth—will dissipate because the toilet is not being flushed regularly, and dust floating into the tank will attach to the moist walls. So you have all three requirements for mold growth and, the longer the toilet sits unused, the uglier it gets.

    Also see our blog posts Are drop-in toilet bowl cleaner tablets safe? and Does a home inspector check toilets?


• • • • • • • • • • • • • • • • • • • • • • • • • • • • 

Here’s links to a collection of our other blog posts about “TOILETS”: 

Why is there sand in the bottom of my toilet tank?  

What are the pros and cons of a wall-mounted toilet?

What are the minimum clearances around a toilet? 

What is the little tank on top of the water heater for? 

What is that big thing in the toilet tank? 

What is the white plastic tank inside my toilet tank?

• Can I install a commercial (wall-mounted flushometer) toilet in my home? 

Does a home inspector check toilets?

• What is the code required minimum height above a toilet? 

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •

Here’s links to a collection of our other blog posts about MOLD, LEAD AND OTHER CONTAMINANTS:

Should I buy a house with mold?  

Why do new homes have more moisture and mold problems than older houses?

Can infrared thermal imaging find mold behind a wall? 

What is the right humidity level in a mobile home?

Who can clean up mold found during a home inspection in Florida?

How do I look for and find mold in my mobile home? 

Does bleach kill mold?

Why is there mold around the air conditioning vents? 

What can I do to prevent mold problems in my home?

Why is there a lead paint disclaimer in my real estate sales contract? 

How can I tell if there is asbestos in a house?

How can I prevent mold in my Florida winter home when I'm gone for the summer? 

Should I use bleach to clean up mold? 

What are those powdery white areas on my brick walls?

• What should I do if mold is found during a home inspection?

    Visit our PLUMBING and MOLD pages for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

site-built, mobile/manfuactured and modular homes

(placeholder)

Search

This

Site

Attics

Air Conditioner & Furnace Age/Size

AFCI, CAFCI, DFCI, & GFCI

Bathrooms

Aging in Place

Appliances

Click Below  

for Links

to Collections

of Blog Posts

by Subject

Cracks

Doors and Windows

Electrical

Energy Efficiency

Fireplaces and Chimneys

Heating and Air Conditioning

Home Inspection

Hurricane Resistance

Electrical Receptacle Outlets

Electrical Panels

Garages and Carports

Common Problems

Exterior Walls & Structures

Insulation

Insurance

Life Expectancy

Mobile/Manufactured Homes

Older and Historic Houses

Mold, Lead & Other Contaminants

Modular Homes

Metal Roofs

Plumbing

Radon

Pool and Spa

Roof and Attic

Remodeling

Safety

Site

"Should I Buy A..."

Stairs

Termites, Wood Rot & Pests

Structure and Rooms

Wells

Water Heaters

Water Heater Age

Septic Tank Systems

Plumbing Pipes

Sinkholes

When It First Became Code

Park Model Homes

Shingle Roofs

Stucco

Wind Mitigation Form

"Does A Home

Inspector...?"

"What Is The Difference Between..."

Brick

Concrete and Concrete Block

Foundations

Rain Gutters

Condominiums

Crawl Spaces

Building Permits

Clay Soil

Floors

Toilets

Generators

HUD-Code for Mobile Homes

Flat Roofs

Sprinkler Systems

4-Point Inspections

Frequently Asked Questions (FAQ)

Building Codes

Inspector Licensing

& Standards

Washers and Dryers

Kitchens

(placeholder)

Electrical Wiring

Plumbing Drains and Traps

Smoke & CO Alarms

Top 5 results given instantly.

Click on magnifying glass

for all search results.

Lighting

Sinks