i believe it is called the sill plate. wood. lays on top of the cement foundation. floor joists lay on top of it. then the floor and a wood stud wall. wood stud wall is gone, down to the floor joists, it was rotted. it is a 40' long wall, 10' section in the middle is rotted. exterior, load bearing wall. single story. false wall is supporting the roof rafters. is there an easy way to replace the sill plate? or is jacking the floor joists with floor jacks and cutting and removing the sill plate the only way? this wall was built in the 1960's. i dont see any bolts or studs to hold the sill plate to the foundation. probably just used cement nails, if any anchor at all. it is a poured cement foundation. crawl space in this section. i was really hoping there was an easier way. i am in CT, i assume i should replace it with pressure treated? should i anchor it to the foundation, somehow? Ramset? with the wall and floor gone i have easy access to the sill plate, but floor jacks in a crawl space wont be fun. reason for the rot was a leaking roof. water went under the roof shingles, then behind the wall shingles. floor joists and sill plate are both 1 1/2 x 7 1/4 .

Hello, I have a question about subflooring. The master bedroom in my house had carpet which was end of life (my way of saying it was disgustingly filthy), so I decided to put in 3/4" pre-finished hardwood floor. I pulled the carpet back and found abandoned 3/4" hardwood floor in about 70% of the floor, vinyl over about 20% (sitting on top of this hardwood), and then the last 10% is just built up scrap wood that was apparently there to repair some water damage? It's very unusual. Anyway, underneath these decades old layers I found what appears to be 1/2" plywood (the actual measurement is exactly 7/16). What should I do here? I was reading I could put down an underlayment layer of plywood to strengthen the floor (it does seem to flex in some parts, is old, and removing the old hardwood floor is damaging it a bit), though the hardwood flooring people said it wasn't a big deal and to just repair and install as-is. Since the carpet/padding were sitting on top of the 3/4" hardwood floor (sitting on top of 1/2" plywood subfloor), all the baseboard/trim were cut for this height, so adding a 3/4" layer of plywood on top of the existing subfloor wouldn't really throw off the height of the room much. However, I don't know if this makes structural sense, or if it's worth the effort. Thanks!