Removing Rot from Joist

13 Oct 2020
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United Kingdom
Looks like I've had a historic leak in the bathroom. So far this is the only rot I've found. Would it be reasonable to cut out say half the depth of the joist, piece in a new section and then sister either side to add the strength back. I've ordered some boron gel to cover everything in after.
The joists are 7 X 2.5 inch, and only spanning 2.5m, if they are the originals then they're 166 years old.. There is no bounce at all to the bathroom floor.


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Yes, but only sister one side, or about 600mm or so of 12mm ply both sides.

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