New build on salvaged foundation

[DBourne702]

Hey all! I'm tackling a new project for my family's summer home and could really use some insight from those with experience. I've salvaged an old stone foundation from a demolished structure and to save on costs and time, I'm planning to build a new house on top of it. The structural engineer has given it the green light for a two-story home, which is a huge relief. The foundation is solid, and the basement is dry, but it needs a major facelift to be ready for the new build.

Specifically, I need to know the best way to level and smooth the top of the foundation for the mudsill and anchor bolts. It's a rough, uneven surface right now. Also, the exterior needs to be fully repointed to look good with the new construction, as a lot of the old mortar is gone. My end goal is a professional, finished look, with hopefully no trace of the house previously built.

I've been looking into a few different approaches and was hoping to get some feedback. Has anyone here had success with shotcreting a new cap and exterior veneer? Or maybe forming and pouring a concrete cap around the whole structure? Another idea was to parging the exterior walls and then adding a new concrete top layer doweled in with rebar.

Any thoughts on which method would be most durable and give the best aesthetic result? I'm curious about the pros and cons of these different structural and cosmetic approaches, and if you have better ideas in mind . Thanks in advance for any advice!

 

[Vshock]

I think you should lean toward forming and pouring a concrete cap with rebar dowels so that you'll get a flat, strong surface for your mudsill and hardware that way. unto the exterior, repointing first is a must, then parging or a veneer will give it that clean, finished look

 

[Wave_Existence]

I’ve seen guys shotcrete a new cap over old stone, but you’ll lose depth inside and it's hard to make it look clean. If I were you, I’d more likely form & pour a concrete topping layer with rebar dowels into stone, and then repoint the exterior so it all ties together.