Dry rot damage : Do not let it get to this point.
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This was a shower pan project to where I was just going to do the neo-angled shower but ran into an unforeseen situation with the seat. The seat structure and adjacent lower studs were completely rotted and improvised by eliminating the seat altogether and creating more space and a eye pleasing design .
This was a shower pan project done in Burlingame , CA. to where the dry rot affected 4 joist and did dilapidating damage to subfloor curb and bottom plates.
I completely restructured the base area . The leak had gone undetected for maybe 20-30 years because the subfloor was plywood and absorbed so much water that it spread 3 feet outside of shower.