Hi there.

I live just north of Vancouver Canada and am in the process of slowly renovating and repairing a new to me 1960s 1100 sql’ single-story bungalow. It’s built on a 2′ crawlspace that needs serious weatherization work (insulate the CMU walls, rim joists, ducting, and new vapour barrier) but there are other issues that I think I should tackle prior.

The 3 rows CMU blocks are seemingly unfilled as I can stick things down into the cores with the small space I can reach from the crawlspace. Also, I’ve looked but it doesn’t seem as though the mud sills are anchored to the block foundation in anyway. (also noted by the home inspector before purchase)

I think I should place anchors into the foundation wall as this area is very seismically active. Perhaps at the time of build it wanst code necessary, or building codes may not have been enforced in this area at the time as it was rather rural, and hard to access in the 1960s.

My question is: Should I fill the block foundation fully with a non shrink construction grout? Or just fill the vertical core sections at the code prescribed actor bolt spacing? 

I won’t be a fun job, but at least a small section of the top of the core is accessible/I could drill a 3/4″ hole in the top core space and use a grout pump gun. I would also drill a hole at the bottom section of the cores to allow for air to escape, and to indicate when the core is full.

Any insight appreciated.

Tim