My house is located in Missouri, currently I have a vented crawl space with a dirt floor. My home was built in 1998. I put a humidity tester in the crawl space and it reads anywhere from 75%-88% humidity at all times of the day. The living area hovers around 60% humidity.
I received a quote from a local company to fix the issue for $10,000.00, needless to say, I have decided to try and fix it myself first. Note, their solution only involved fixing the crawl space, they did not even mention fixing outside water issues.
The crawl space has a sump pump in the lowest corner, with a drain tile on the entire lowest side leading to the sump pump.
The house is on a slope, where the front of the house is the highest point, and the back of the house slopes down. The front of the house faces North.
All of the gutters go underground, and drain the water 5-6' from the house. The pipes which transport this water are always full of water, but when it rains they do seem to push water out.
The front of the house has no downspouts (they are on the sides), and during a downpour water overflows over the front gutters, then gets into the crawl space on the north side. After it rains, the front gutters still have 1/2" standing water which eventually evaporates. (I think the slope is wrong).
I also have a faucet on the front of the house, if this faucet is on for any amount of time, and drips onto the ground on the front of the house, this water also makes it's way into the crawl space.
I find it odd that there are no downspouts on the front of the house, though this might be because of the slope?
How should I deal with this humid crawl space?
Note being Missouri the crawl space is super rocky, to the point where it would be impossible to remove all of the rocks, will 6 mil vapor barrier be OK on top?
After much research I came up with the following:
- Fix front gutters so they do not overflow (either increase size, or fix slope)
- Remove the handle from the front faucet so it is never used.
- Seal Crawlspace Vents
- Lay 6 mil vapor barrier, stake down with garden stakes (currently not planning to go up the walls)
- Seal the top of the sump pump bucket
- Install dehumidifier that will run continuously and drain into the sump pump (Frigidaire FFAD5033R1)
Does this seem like a sound plan? Any advice would be greatly appreciated.
Currently there is about a 1/2" of standing water in the crawl space on the very north side.
I have done a thorough inspection, and crawled through the entire crawl space and there is no wood rot, the soil is damper in the center, and north side of the crawl. It smells like a cave, and this smell seeps into the living area. My hardwood floors have slight cupping.