Is this mold?

LobukiaApril 19, 2013

Half of the underside of my crawl space is clean, the other half looks dusty... is this mold?

Thank you for reporting this comment. Undo

The white on the joists?

See if it wipes off, first dry and then with some water.
It may be nothing more than dirt that has been sitting on the joists since the place was built.

The dirtier ones may have been the bottom of the stack resting on the ground before being installed.

    Bookmark   April 22, 2013 at 12:09PM
Thank you for reporting this comment. Undo

As a cerified mold tester and with the quality of picture being taken into consideration.

Mold requires three things to grow moisture, humidity and temperature. I would think if these where a problem that the mold would tend to be black and not just limited to floor joist and not all the wood around i.e. subfloor.

However if you notice a damp or musty smell you may want to have it investigated further.

Here is a great link as a resource for further information.

Good Luck


Here is a link that might be useful: epa mold guidelines

    Bookmark   August 1, 2013 at 9:10PM
Sign Up to comment
More Discussions
making the crawl space more useful?
My house has a (vented) crawl space between 2 and 3'...
What kind of ceiling to do?
We are wanting to finish out basement rustic/lodge...
Replacing Steel Column With Stud Wall?
I am interested in replacing a steel column with a...
Easier way to burst up concrete?
Since it seem I have to do some concrete busting work...
Mysterious Concrete Box in Basement
I am considering placing an offer on a house (built...
Sponsored Products
Laminate Molding & Trim: Zamma Building Materials Asheville Hickory 9/16 in.
$19.98 | Home Depot
Seaside Area Rug
Home Decorators Collection
Juno 445 4" Adjustable Slot Aperture Trim
LBC Lighting
Simplicity by Strasser Cabinets 24 in. Single Door Medicine Cabinet in Satin
Home Depot
Chante Ceiling Medallion - White
Signature Hardware
KOHLER Bathroom Tresham Pedestal Combo Bathroom Sink with 8 in. Centers in
Home Depot
Vanilla Dinnerware
Home Decorators Collection
Martha Stewart Living™ Swirling Garden All-Weather Area Rug
Home Decorators Collection
© 2015 Houzz Inc. Houzz® The new way to design your home™