Take the 2-minute tour ×
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It's 100% free, no registration required.

There's a shed near the side of the house with a roof that's pitched to shoot water at the house's foundation. That side of the house also has no gutters. There's a very slight grade to send water towards the front of the house. House is brick veneer, on-slab.

How can I build a drainage system to carry water away from the foundation?

share|improve this question
add comment

3 Answers

up vote 11 down vote accepted

Here is a pretty quick explanation.

  1. Starting from where the water will enter the drain and ending where the water will flow out, dig a ditch that's about 10 inches deep and 6 inches wide. Keep in mind that you will need to dig deeper if your starting point slopes upward.

  2. Lay about 2 inches of rock into the trench before placing the pipe lengthwise into the ditch.

  3. Cover the pipe with another layer of rocks, again about 2 inches.

  4. Fill in the remaining space with soil and then plant some grass.

Here is a pretty good video, which also shows it's a good idea to add a clean-out.

They also say you should not use flexible corrugated perforated plastic drain pipe, because it cannot be cleaned like rigid pvc can be.

share|improve this answer
add comment

Here's another article about a French / Trench drain:

Basically the same idea, except he doesn't recommend lining the ditch with fabric or putting a sock on the pipe. He does recommend using rigid perforated pipe instead of the corrugated pipe with slits in it.

share|improve this answer
    
I like the idea of omitting the fabric (expensive!). Great link. –  Steve Jackson Nov 19 '10 at 5:25
5  
@Steve - I dug a French drain on the uphill side of our house 30 years ago. I don't think we even had fabric back then. It worked great - for the first 10 years. I've had to use a sump pump ever since. That crushed rock isn't good for much once it's all silted up. –  Ed Staub Sep 24 '11 at 13:38
add comment

Depending on the area , and your costs, you could also just buy a prefabricated french drain and save yourself some times. Your BIG local hardware store would have something like this:

enter image description here

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.