I am going to build an addition with most likely full basement
foundation made from cinder blocks. What's the best way to waterproof
the foundation. My home basement foundation is also built from cinder
blocks with no waterproofing as far as I know. I usually do not have
any leaks as long as gutters are cleaned. However I want to make
maximum effort to ensue the finished basement under addition will be

Drain tile around the base of the foundation, leading someplace where
the water can go. Parging on the outer surface of the wall, then
a tar-based sealant, up to grade, and something that isn't black
from there up. Grade away from the foundation, and lead
the downspouts away.