Correct installation of new baseplate sections laying over floor joists.gif (140.68 KiB) Viewed 1591 times In terms of adding a 'scab' to the 2x4 do you mean attaching a new 24' piece of 2x4 to the sides of the existing 2x4's? My visualization is that the green outline is where I cut out the old and put in new and the red indicates the new 2x4 scab. I will of course butt them up against each other even though the picture does not indicate this. The red represents the sections of new base plate installed. Replacing Rotted Sill Or Bottom Plate In A Garage Wall garagerenovations Garage Decor, Garage. The green represents imaginary floor joists. Installing rafter ties to fasten wall studs to top plate. Inccorect installation of new baseplate sections not laying over floor joists.gif (139.84 KiB) Viewed 1591 times This picture is my understanding of a correct installation of new baseplate sections laying over floor joists as you describe. I still have to locate them under the subfloor. The green represents imaginary floor joists. This picture is my understanding of an incorrect installation of new baseplate sections not laying over floor joists as you describe. Chad used a level as a straight edge to mark the edges of new wall plate, in this case a 2×6, to replace the water damaged plate. Leave the jack and the base of the column on the floor just next to the bottom sill plate you need replaced. Adjust the column up so that it fits snugly. I just want to make sure I completely understand. Slide the column top under the top wall plate. Lol! I've attached a few pictures to try to depict my understanding so far.

I'm not familiar with the term 'scab' in carpentry.

Replacing a rotten top plate