If you have access to the joists from under the floor, it should be a fairly easy task to install a new joist along-side of the existing one then cut back the existing joist to eliminate the rotted end. Your old joists will be actual dimension lumber and you will be buying nominal lumber which will probably not be as wide or thick. Just be sure to rest the new joist on the sill plate, then attach the joist (sister) along the length of the joist nailing in a staggered pattern at 6-inch interval. The old joist will continue to carry the floor load, and the new joist will transfer that load to the sill plates.
Since there is no sagging, you don't need to do anything very elaborate. The final appearance will look like a doubled joist. You can even replace the section you cut out with a short length of 2x10 (or whatever size you are using). It might be easier to cut out the rot before you install the new joist, just be sure to provide temporary support to the joist until it is secured to the new sister. |
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