cornbread869

I had a 12" foundation and 6" slab poured and everything looks great, but the contractor made the comment that he drilled into the slate about a foot or so below the concrete and placed the rebar in the holes for increased strength. I mentioned this to a different contractor that came by to do some other work and he said that this could cause issues later with rusting. The structure has already been built and completed on top of the slab and has quite a bit of weight on it, but I'm not finding anything concrete ( pun not intended) online as if this is a serious issue or something that won't be problematic for 100 years. What is your far more educated opinion?

I had this wall poured by a contractor, however he lost the measurements I gave and made new ones with the door on site. The problem is he measured the actual size of the door without consideration that the rough opening needed to be bigger. He has ghosted so I am not going to be able to get any help there. My opening is 37" wide and 80 1/4" tall, with the depth being 7 1/4" with the 2x8 mounted there, 8' without it. My question is do I have to have the wood there or can a door be mounted directly to the concrete? Would it be possible to grind the concrete down to match a standard door spec? I can get a custom door ordered I think, however I have been quoted in the ~2k range and at this poin

I had this wall poured by a contractor, however he lost the measurements I gave and made new ones with the door on site. The problem is he measured the actual size of the door without consideration that the rough opening needed to be bigger. He has ghosted so I am not going to be able to get any help there. My opening is 37" wide and 80 1/4" tall, with the depth being 7 1/4" with the 2x8 mounted there, 8' without it. My question is do I have to have the wood there or can a door be mounted directly to the concrete? Would it be possible to grind the concrete down to match a standard door spec? I can get a custom door ordered I think, however I have been quoted in the ~2k range and at this poin

I am having a concrete roof poured this week. The pad will be 6" thick, 15'x15' span on 8" concrete walls. The concrete is the 4000 psi. The contractor is "old school" as he calls it with I am fine with if it is safe, but this is usually a red flag, and says all it needs is rebar, no column underneath and no mesh needed. He is using 1/2" rebar on a 1' square grid. Instead of the the rebar stands he also prefers to use cap block he has sawed into 3" cubes. He has told me he is fine doing any requests I have, but after a day of dozens of phone calls to Structural Engineers in my area I am no closer to one that can help me decide what needs to be done with this slab so it is safe. I thought I

I am having a concrete roof poured this week. The pad will be 6" thick, 15'x15' span on 8" concrete walls. The concrete is the 4000 psi. The contractor is "old school" as he calls it with I am fine with, and says all it needs is rebar, no column underneath and no mesh needed. He is using 1/2" rebar on a 1' square grid. Instead of the the rebar stands he also prefers to use cap block he has sawed into 3" cubes. He has told me he is fine doing any requests I have, but a Google search does not make one a concrete pro or even novice. How would you guys go about it? Thanks for any advice or recommendations