On Saturday, February 29, 2020 at 9:54:30 AM UTC-5, Ed Pawlowski wrote:
On 2/29/2020 9:48 AM, TimR wrote:
When the weather warms enough I'll get to replacing some rotted sill plate in my shed.

But I had a thought, which is maybe a dumb idea, I dunno.

I have to cut each stud above the plate, add a section, and connect to the new sill plate. The floor is concrete slab. The old sill plate is wood but metal wrapped, kind of weird. I haven't seen that before. It didn't seem to protect it any though.

What if instead of laying the new sill plate directly on the floor, I placed one row of concrete block? Block is cheap, it would elevate the plate a bit above the moisture. It will take a bit longer, but if it saves me doing this job again at my age it would be worth it.

You are going to use pressure treated on the new plate right? Should
last 25 to 50 years so think about how long you are going to last and
decide from there.

+1

Was the old one pressure treated? How long did it last? In my experience
pressure treated easily lasts 20+ years. I have 6x6s I put in for edging
beds 25 years ago that are still good. The ones that were already here
are 35, those are failing. And that's full exposure, partly in the ground, etc.
Another question is if something is contributing to it, eg roof water runs
off and drops right at the perimeter, splashes up, gets inside, etc?