swagging floor,jack unit consist of liftable jack,concrete bricks,concrete wrap cloth

[Gp G.]

Hi All,

I have old property. About 3 years ago I had floor syncing issues for which one contractor put 5 jack units in the crawl space to lift floors a little bit as attached. Couple of days ago a tenant complained that tile grouts were missing and tiles were moving in the kitchen area as attached. Other than the kitchen all other rooms have LVP flooring. One contractor said he can put the grouts for 300$. Is it a good idea to do tile grout repair for 300$ or replace tiles with LVP in the kitchen? Do I need to lift up the jack a little bit? I called one foundation contractor about 3 years ago. He inspected everything and mentioned the foundation is overall fine with this 1961 property on crawlspace. I had a lot of rain water drainage issues in the past for which I built a french drain /trench drain on the side and back which stopped those drainage water issues flooding my backyard and crawlspace areas(at one point lot of drainage street rain water used to sit many days in crawlspace which used to be pumped out by handyman). Septic field lines failed and I have to put a small Elgin septic system in the front yard between driveways of this duplex. Also one waterproof contractor put sump pumps in crawl space which gets water pumps out. I wonder how that water comes in the sump pump from underground also. I have to upgrade the whole electric also.

I called same contractor now who says it needs about 8 new jack units and put about 4 joists for4000$. I asked him if I have to do entire floor new and then LVP on top new then it cost about 15k.  I am thinking to go with 4000$ repair as he seems know what he is talking and doing. I asked this contractor in future if I have to do new flooring is it easy to remove those  jack units for which he said it is easy except concreate wrapped around yellow is more difficult but can be removed. Is there any other better way of lifting these swaging floors in cost effective way. Please advise