So my basement stinks like mold/mildew. We just purchased the house a few months ago and never really did anything about it as we've been pretty busy over the summer. There are a number of issues that might have been the cause. The basement flooded previously, the gutters have been clogged, the grading is incorrect, and the gutters are draining right against the foundation. All that being said, we're aren't getting any water coming in, except for some efflorescence on the walls. But I did notice mold growing on some leather items I put in the basement when we moved in. We've done some stuff to help the causes, but they won't really be fixed until we fix the grading. I'm wondering if it's worth my time to scrub down the walls with a bleach solution before winter starts to try to improve the smell.
Things we've done so far:
1) Put in a dehumidifier running constantly draining into the sump pump.
2) Cleaned the gutters
3) Added extended downspouts
Things we're planning to do in the spring:
1) Replace the gutters and reroute some of them ( some of them are in stupid locations )
2) Get a ton of dirt and stone to improve the grading around the foundation so it's sloping away, some spots are pretty bad.
So the root of my question is how to clean the basement. Should I just mix like 1 part bleach to 5 parts water, put it in like a garden spray thing, spray and scrub on the walls? Do I need rinse it? Do you think I'll be wasting my time if I do this before we fix the grading? Is there anything else you'd recommend? I've heard mixed reviews of applying like a drylock paint after you clean it. I think it'd help a lot with the moisture, but wouldn't the water end up staying in the concrete eventually causing cracks?
Any help is much appreciated, this is our first basement and excited to get it all straightened out so we can enjoy all the space we have down there and eventually finish it once we have all the moisture issues resolved.
Some pics below