Latest Discussions : Basement & Foundation


06:31PM | 10/01/09
Member Since: 09/30/09
1 lifetime posts
Our house has a poured concrete basement floor. Several cracks have occurred in the floor allowing a white foamy substance to seep through all around the cracks. What is it and how do I get rid of it? I'm worried about the heatlh risks. Any advice??

Bob Smith


02:43PM | 10/02/09
Member Since: 03/03/05
271 lifetime posts
It could be a number of things, however the two most common substances that are white and fuzzy are Efflorescence and Mold/Hyphae. Put on a latex glove and touch it. If it is gritty, it is probably efflorescence. If it falls apart with ease, it could be hyphae.

If you could supply a good close-up picture, I may be able to determine the substance. The only true way is to have it lab tested.

If it is mold, you should have it treated.


06:24PM | 04/17/13
I have this white foam coming throught the cracks in my basement floor is it a type of mold and a health risk?


10:53AM | 09/08/14
I have a great deal of white foam coming around the cracks in my basement as well as under the wood panel on the walls. I want to remove the panel and clean the foam from the brick walls. Is this dangerous for me to do? if so, what are other recommended solutions? Additionally, what can I use to clean this substance? Thank, Barbara R.


05:43AM | 09/09/14
Member Since: 06/23/14
4 lifetime posts
Alex mason
May be white foam is due to mold. Clean all the powder and patch up the crack to fix the issue.


08:51PM | 07/11/15
The white foam that came up on our garage floor dried to a powder. When the powder is swept up the concrete is crumbly. What do we need to do to treat?

Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button