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Old 09-25-2011, 07:14 AM   #1
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Old ceiling sheetrock - and rot?


This home was built in 1981 - not top-dollar. In the kitchen and dining room where I've removed the old lighting fixtures there were dark circles in the shape of the fixture base.

At first I thought these were areas of discoloration due to age - nothing substantial.

But when I began to patch them over this darker area began to just fall apart when I touched it - it was weakened, the gypsum looked cracked and shattered - and I ended up cutting out all this darkened, weakened area so I'd have solid sheet rock to work with in order to affix a proper patch.

What caused this area to weaken and discolor?

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Old 09-25-2011, 08:02 AM   #2
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Old ceiling sheetrock - and rot?


The rot is JUST where the fixture was?
It was likely the heat under the fixture that aged it very quickly.
Might have been allowing moisture to pass over/through it too. Both together would do it even faster.

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