I’m in the process of redoing a bathroom and it has been stripped down to the studs and floor joists. Some of the joists had been notched on top and whatever the notches provided clearance for is no longer there.
I have sistered new joists where needed and was wondering if there is any advantage to filling in the notches?
The top of the joist is in compression when a force is applied and if the notch is filled in with a “dutchman” would that restore any strength?
I assume it will never be “good as new”, but if I glue and force fit in some patches will it help or is a waste of time? I was thinking it would transfer the compressive force along the top of the joist instead of an inch or so down. I was always under the impression that if you notch 2″ out of the top of a 10″ joist you now have the span capacity of an 8″ joist – is that true? And if so would filling the notch return it a 10″ capacity?