remodeling in a flood-prone area - wish I'd known this sooner

Couldn't agree more - hydraulic cement is handy for quick patches, but it's definitely not a long-term solution. I've seen plenty of basements where homeowners tried sealing cracks from the inside, only to have water seep in somewhere else. Like you said, water always finds another way in.

One thing I'd add is that exterior waterproofing membranes can be a solid investment if you're already excavating for drainage or grading work. They're not cheap, but when combined with proper drainage systems - like French drains or even just well-placed downspout extensions - they can really help keep moisture out permanently. I've had clients who initially balked at the upfront cost, but later admitted it was worth every penny after seeing neighbors struggle with recurring basement floods.

Also, don't underestimate the value of good gutters and downspouts. Seems basic, but you'd be surprised how many homes I visit where clogged gutters or poorly placed downspouts are causing major foundation issues. Redirecting roof runoff away from your foundation is one of the simplest and most effective ways to prevent basement flooding.

Bottom line: interior fixes might look appealing because they're less disruptive, but addressing water issues from the outside is usually the smarter long-term play.

Wish I'd read this thread a couple months ago... I spent a weekend patching cracks from the inside, felt pretty proud of myself too, until the next big rainstorm hit and water found a totally new spot to sneak in. Thinking exterior waterproofing might be my next move - anyone tackled this DIY or is it strictly pro territory?

"Thinking exterior waterproofing might be my next move - anyone tackled this DIY or is it strictly pro territory?"

Honestly, exterior waterproofing can be a big can of worms if you're not experienced. Before you dive into that, have you checked out improving your yard's drainage first? I had similar headaches with leaks popping up everywhere until I regraded the soil around my foundation and added some decent gutters. Might save you some serious cash and hassle...