Well, my disposal cracked sometime in the near past, and was dumping water on the cabinet floor. The cabinet floor was already in bad shape, but this time there was a 3" bow, as well as visible black mold.
Many times, bottom of cabinets are laminated particle board, which is not a good choice for this area.
I am not a carpenter and I have very limited experience with woodworking skills and knowledge. Or at least, I think I do. But so far, I'm about halfway done, and I consider this 3 out of 5 difficulty so far. If you know how to measure, cut, and have the set of basic tools, as well as patience, this is not difficult at all!
Step 1: Claw hammer time.



Step 2: With the bottom of the cabinet removed (as well as the front fascia), you now have access to the supports. Mine had water damage, so I will replace the supports. Underneath the supports is another particle board that was drilled into the subfloor. I wasn't happy with that particle board, so I choose to keep removing.



Step 3: Now we have the subfloor exposed. This subfloor is in good shape, minus a small area of mold which was cleaned neutralized after this photo was taken. I was actually quite surprised to find that the spray worked very well. Remove the water pipe brackets that fasten to the subfloor. I took a chisel to remove every bit of old particle board near the edges to have a nice square opening.
Step 4: NOW is a good time to replace all the water valves since you have the best access at this point. These valves are really not meant to last 25 years, so I went ahead and replaced all three. Don't forget to turn off your water before replacing them.

Many times, bottom of cabinets are laminated particle board, which is not a good choice for this area.
I am not a carpenter and I have very limited experience with woodworking skills and knowledge. Or at least, I think I do. But so far, I'm about halfway done, and I consider this 3 out of 5 difficulty so far. If you know how to measure, cut, and have the set of basic tools, as well as patience, this is not difficult at all!
Step 1: Claw hammer time.



Step 2: With the bottom of the cabinet removed (as well as the front fascia), you now have access to the supports. Mine had water damage, so I will replace the supports. Underneath the supports is another particle board that was drilled into the subfloor. I wasn't happy with that particle board, so I choose to keep removing.



Step 3: Now we have the subfloor exposed. This subfloor is in good shape, minus a small area of mold which was cleaned neutralized after this photo was taken. I was actually quite surprised to find that the spray worked very well. Remove the water pipe brackets that fasten to the subfloor. I took a chisel to remove every bit of old particle board near the edges to have a nice square opening.

Step 4: NOW is a good time to replace all the water valves since you have the best access at this point. These valves are really not meant to last 25 years, so I went ahead and replaced all three. Don't forget to turn off your water before replacing them.
