First of all, I know this garage will never be dry. It's a standalone, one car garage built into the side of the hill that my house sits on. It abuts the neighbor's yard, and they have landscaping and flowers they frequently water. My neighbor even says the garage gets more water in it when they water a lot.
The garage has a rubber roof with two gutters that do not effectively drain water. The aluminum edging is not sealed to the rubber, so I'm guessing most water goes straight down instead of into the gutter. There is brush cover on all 3 sides of the garage.
Inside is a concrete floor with some cracks. The walls are unsealed cinder block. Even though it has been dry, you can see how much moisture is here. Should I try and seal the walls with DRYLOK?
My ultimate goal in drying this out is to build a small climbing wall in the garage. It will be 2x4 frame with plywood. I don't mind if it's humid, but I'd prefer that it not smell strongly of mildew. I don't want the wood to rot from moisture.
Plan of attack and open questions:
- I have considered digging a trench around the perimeter and installing a simple drain tile system. Is this worthwhile? How deep should I go?
- DRYLOK the walls?
- Obviously, fix the gutter system and roof.
Anything else I should do?