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French Drain Advice
I have water seeping into my crawlspace on the back side of my house. Unfortunately, this caused mold and some rot. I have since had the mold removed, encapsulated the crawlspace and installed a dehumidifier. The seepage wasn't discovered until after the encapsulation was completed after several days of rain. I guess having the vapor barrier down allowed the water to stick around long enough to pool in a low spot. I ended up cutting the vapor barrier and using a towel to sop up the water which was about a gallon. I repaired the vapor barrier once the dehumidifier dried the soil out. I am thinking I need a fench drain along the back of my house to capture subsurface seepage as there isn't any visible pooling or flow to or near the house. My property gently slopes down hill with my house in the middle so the area behind the house is elevated. I have about 6' to work with in-between the house and the pool. I figured I would split the difference and install the drain 3' from the house and go 3' down which would put me about a foot below my block foundation and surface of my crawlspace. I would, of course, do the burrito method with clean gravel and slope the pipe about 1.5' over the total 130' span. The french drain itself will only be 30' which gets me a couple feet past both corners of my house. I do not plan to cover the trench with soil but tather fill to the top with drain gravel. I had an idea to install pond liner plastic along the side of the trench on the house side asanadded precaution to prevent horizontal seepage. Any downside to this? I have a 2' eve so very little rain will land in between the house and fench drain. Also, I have red clay soil. If anything seems off, I would appreciate corrections. My trench will be 18" wide since that is the width of the excavator bucket. Many thanks! submitted by /u/Desperate_Breath3082 [link] [comments]
I have water seeping into my crawlspace on the back side of my house. Unfortunately, this caused mold and some rot. I have since had the mold removed, encapsulated the crawlspace and installed a dehumidifier. The seepage wasn't discovered until after the encapsulation was completed after several days of rain. I guess having the vapor barrier down allowed the water to stick around long enough to pool in a low spot. I ended up cutting the vapor barrier and using a towel to sop up the water which was about a gallon. I repaired the vapor barrier once the dehumidifier dried the soil out.
I am thinking I need a fench drain along the back of my house to capture subsurface seepage as there isn't any visible pooling or flow to or near the house. My property gently slopes down hill with my house in the middle so the area behind the house is elevated. I have about 6' to work with in-between the house and the pool. I figured I would split the difference and install the drain 3' from the house and go 3' down which would put me about a foot below my block foundation and surface of my crawlspace. I would, of course, do the burrito method with clean gravel and slope the pipe about 1.5' over the total 130' span. The french drain itself will only be 30' which gets me a couple feet past both corners of my house. I do not plan to cover the trench with soil but tather fill to the top with drain gravel.
I had an idea to install pond liner plastic along the side of the trench on the house side asanadded precaution to prevent horizontal seepage. Any downside to this? I have a 2' eve so very little rain will land in between the house and fench drain. Also, I have red clay soil. If anything seems off, I would appreciate corrections. My trench will be 18" wide since that is the width of the excavator bucket.
Many thanks!
[link] [comments]
