Old Ceiling Sheetrock - And Rot? - Drywall & Plaster - DIY Chatroom Home Improvement Forum

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Old 09-25-2011, 07:14 AM   #1
Military Mom of 4
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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?


At this present moment in time I am making cabinets for the kitchen - just in case you wanted to know what I'm doing when I'm not around.
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Old 09-25-2011, 08:02 AM   #2
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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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