If you have white mold visibly growing on your carpet then you have heavy mold growth underneath the carpet on the padding.
White powder under carpet.
Smelling mold in your home is another symptom of heavy mold growth.
Efflorescence is normally worn off or washed away on unsealed concrete surfaces.
Efflorescence is caused by vapor migrating through the slab bringing soluble salts to the surface of the concrete.
Another cause could be alkaline salts coming up from the concrete slab underneath.
Hand tufted rugs are constructed from different parts that are glued together.
One cause of the white powder could be the deterioration of the carpet backing.
You shouldn t necessarily be concerned unless sections of your rugs pile or yarn are slowly surfacing.
We use that once a week before we vacuum.
On mine at least it s definitely latex from the backing that s bonded to the rug.
The white powder of which appears underneath a tufted rug is actually dried up particles from the glue which had once held wool securely to the canvas or foundation of the rug.
White mold is often found in two locations in a crawlspace exposed soil and the lower portions of the floor joists.
Mold typically smells damp or musty.
The white powder under your rug is latex and its powdery mess is a common occurrence with hand tufted rugs.
I think it is just carpet freshener.
Heavy white mold growth on floor joists.
A ph test evaluates this as well as by checking the moisture content of the slab itself.
Posted by turducken at 3 36 pm on august 28 2008 in my experience it s the dirt filtering through the rug.
The stuff is powdery and uniformly white or light in color if that helps.
Sometime vinyl and other materials break down and the result is a powder under the carpeting.
There is a canvas with the design mapped out that the wool strands are inserted into using a tufting gun.
But when it occurs it s often white in color.
Efflorescence is the white powdery substance on the surfaces of unsealed concrete and the white blush seen with sealed floors.