basement waterproofing dilemma
We just purchased a new home that is ten years old. During the latest storm we discovered water dripping down the wall of the basement "tornado shelter." This is a closet-like area excavated underneath the front bricked porch. We have also noticed what looks to be yellow mold growing on the back wall of the shelter, which seems to get bigger every day. No other water anywhere except some dampness where the floor meets the walls.
We've had two basement waterproofers come out and give us their opinions. One tested the concrete block walls of all the basement and deemed them three of them moist and recommended an interior drain, sump pump in the tornado shelter, and "rigid seal" (white cardboard looking stuff) on the walls.
The second said he doesn't believe in rigid seal because it traps moisture and recommended all basement perimeter have the drain and a sump pump in the lowest corner of the basement.
First guy gave us an estimate of $6500 -- second guy is still working on his estimate. I'd appreciate all your opinions as to who to go with. Both seemed like honest fellows. Thanks guys!