Can someone help me explain this anomaly? | TruckMount Forums #1 Carpet Cleaning Forums

Can someone help me explain this anomaly?

SuckItUp

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I'm not sure I've ever seen plastic covering over a rug do this much damage.

Anyone know why this would or could happen?

The plastic 'protector' was sitting on the carpet and rug for 2 years. It looks wet, but nope! Dry as a bone.

Thoughts?
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OneBlueSummer

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That's from moisture, happen to have a thermal camera? Probably urine that was trapped for years un noticed. In the right conditions stuff can stay wet indefinitely without proper drying. Could be moisture from sub floor but I doubt it. Have a moisture meter?
 
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Mama Fen

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Looks to me like that corner of the rug got VERY wet at some point (you can see a clearly defined moisture "ring" along the curved edge there, and discoloration on the rug to match in the pic where it's pulled back). Plastic acts as a moisture barrier, meaning what's under it cannot dry, so it sat wet for a long time.
 
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SuckItUp

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That's from moisture, happen to have a thermal camera? Probably urine that was trapped for years un noticed. In the right conditions stuff can stay wet indefinitely without proper drying. Could be moisture from sub floor but I doubt it. Have a moisture meter?
My first theory was urine and it would make sense. But the plastic covered a large area and it couldn't have water wicked that far, I would think. Everywhere it covered, it turned darker and looked... Wet.

2ND theory: Humidity. Moisture slowly seeped it's way in due to years of circulation - Much the same way dark ventilation lines between carpet seams form. Except, the home wasn't properly ventilated.

3RD theory: Concrete sub flooring built up moisture, some how? Small leak, or something of that nature.

Can't think of anything else!

(P.S - Yes on the MM. But the Moisture meter picks up ZILTCH!)
 

SuckItUp

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Looks to me like that corner of the rug got VERY wet at some point (you can see a clearly defined moisture "ring" along the curved edge there, and discoloration on the rug to match in the pic where it's pulled back). Plastic acts as a moisture barrier, meaning what's under it cannot dry, so it sat wet for a long time.
This would make sense, the only problem is that the entire area covering the rug and carpet with plastic (in pic) had this same "wet" look, but was bone dry even when moisture tool used.

I've experienced discoloration quite a few times from these plastic carpet "protectors", but this is all kinds of different.
 

Mama Fen

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This would make sense, the only problem is that the entire area covering the rug and carpet with plastic (in pic) had this same "wet" look, but was bone dry even when moisture tool used.

I've experienced discoloration quite a few times from these plastic carpet "protectors", but this is all kinds of different.
Just because it's dry now doesn't mean it wasn't wet at some point. ;)
 

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Could have been cleaned in place, or carpet was cleaned and the customer rolled it back out over carpet without waiting(seen that more then once), or what i was presuming being it had plastic on it. Ive seen this happen under a chair pad in a basement. Some basement carpets are damp to the touch. But it evaporates. If they had plastic over it that creates a lid. Moisture can come up through the floor especially with heavy rain. One house they couldnt have carpet. The concrete was actually getting wet there was so much moisture wicking up. They went on through adding trenches sump pits ... i think they gave up on finishing the basement.
 
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