Water proofing open stud bay behind stucco wall

[MalibuLX3]

I have a garage that was built in the 1950s. The exterior is stucco, and on the inside, some of the tarpaper is failing. I also had to replace some studs due to termite activity, which also caused some of the damage to the tarpaper. After a big rain, I noticed some water coming into to the garage through the walls near the bottom of the wall. After much reading, many say the only option is to remove the stucco and replace the tar paper, but that’s not in the cards here.

Does anyone have any thoughts on a cost effective way to enhance water proofing from the inside out? Maybe it won’t be 100%, but hopefully it can be better than it is now. Eventually, I’d like to cover the walls with plywood, so I’m looking for ideas on how to keep this dry without stating over.

 

[jrsavoie]

Closed cell high density spray foam?

 

[jkuro]

Regrade the OUTSIDE away from the garage to keep it dry.

 

[egdede]

^^^ You need exterior grade to be lower than the elevation of the slab. You might need swales if you are on sloped land that is higher than the slab on one side.

 

[Bucko]

From the picture I'm gonna guess your garage is close to the property line and you have about 5 feet between your garage and that concrete wall. As others have said controlling the waterfowl is crucial. Does it slope away from your garage on that side and do you have gutters. No gutters will cause alot of splash back and affect the stucco.