2 replaced http://diy.stackexchange.com/ with https://diy.stackexchange.com/
source | link

Our house is in western Washington and during the winter we get a lot water in the crawl space. I'd like to tackle installing a drainage system – probably with a sump pump – and then encapsulate the crawl space to warm up the floors above and control moisture from the crawl space.

I'm thinking that the approach would be to install a drain around the perimeter of the crawl space that runs back to a sump (or sumps) and pump from there. I think my idea is similar to How should I install a curtain drain in my crawl space?How should I install a curtain drain in my crawl space? and the follow ups Curtain drain in the crawl space - Part 2Curtain drain in the crawl space - Part 2 and Curtain drain in the crawl space - Part 3Curtain drain in the crawl space - Part 3. But I have a few questions about the design, details, and materials:

  1. First is a design question, assuming that there isn't obvious evidence of a spring will a drain around the perimeter catch most or all of the water intrusion?

  2. How far away from the stem walls should I keep the trench for the drain?

  3. Is a "perforated drain pipe with sock" like this product from Home Depot a good choice for the drain or would I do better with one of the "drainage systems" that seem to the rage with the crawl space encapsulation specialists?

  4. Assuming that the pipe and sock is the right material, is there a rule of thumb for how large the trench should be?

  5. The pipe seems pretty flexible, so I'm wondering about keeping a constant grade. Do I want to do something like lay down a bed of sand and slope that to ensure drainage? Or is an overall pitch all I need?

  6. Would there be any reason not to use the material excavated from the trench to fill in low areas in the crawl space? I was thinking of trying to create either a flat floor or a gentle crown in the center.

  7. Is there anything else I should be thinking about?

Our house is in western Washington and during the winter we get a lot water in the crawl space. I'd like to tackle installing a drainage system – probably with a sump pump – and then encapsulate the crawl space to warm up the floors above and control moisture from the crawl space.

I'm thinking that the approach would be to install a drain around the perimeter of the crawl space that runs back to a sump (or sumps) and pump from there. I think my idea is similar to How should I install a curtain drain in my crawl space? and the follow ups Curtain drain in the crawl space - Part 2 and Curtain drain in the crawl space - Part 3. But I have a few questions about the design, details, and materials:

  1. First is a design question, assuming that there isn't obvious evidence of a spring will a drain around the perimeter catch most or all of the water intrusion?

  2. How far away from the stem walls should I keep the trench for the drain?

  3. Is a "perforated drain pipe with sock" like this product from Home Depot a good choice for the drain or would I do better with one of the "drainage systems" that seem to the rage with the crawl space encapsulation specialists?

  4. Assuming that the pipe and sock is the right material, is there a rule of thumb for how large the trench should be?

  5. The pipe seems pretty flexible, so I'm wondering about keeping a constant grade. Do I want to do something like lay down a bed of sand and slope that to ensure drainage? Or is an overall pitch all I need?

  6. Would there be any reason not to use the material excavated from the trench to fill in low areas in the crawl space? I was thinking of trying to create either a flat floor or a gentle crown in the center.

  7. Is there anything else I should be thinking about?

Our house is in western Washington and during the winter we get a lot water in the crawl space. I'd like to tackle installing a drainage system – probably with a sump pump – and then encapsulate the crawl space to warm up the floors above and control moisture from the crawl space.

I'm thinking that the approach would be to install a drain around the perimeter of the crawl space that runs back to a sump (or sumps) and pump from there. I think my idea is similar to How should I install a curtain drain in my crawl space? and the follow ups Curtain drain in the crawl space - Part 2 and Curtain drain in the crawl space - Part 3. But I have a few questions about the design, details, and materials:

  1. First is a design question, assuming that there isn't obvious evidence of a spring will a drain around the perimeter catch most or all of the water intrusion?

  2. How far away from the stem walls should I keep the trench for the drain?

  3. Is a "perforated drain pipe with sock" like this product from Home Depot a good choice for the drain or would I do better with one of the "drainage systems" that seem to the rage with the crawl space encapsulation specialists?

  4. Assuming that the pipe and sock is the right material, is there a rule of thumb for how large the trench should be?

  5. The pipe seems pretty flexible, so I'm wondering about keeping a constant grade. Do I want to do something like lay down a bed of sand and slope that to ensure drainage? Or is an overall pitch all I need?

  6. Would there be any reason not to use the material excavated from the trench to fill in low areas in the crawl space? I was thinking of trying to create either a flat floor or a gentle crown in the center.

  7. Is there anything else I should be thinking about?

1
source | link

DIY Crawl Space Drainage and Encapsulation

Our house is in western Washington and during the winter we get a lot water in the crawl space. I'd like to tackle installing a drainage system – probably with a sump pump – and then encapsulate the crawl space to warm up the floors above and control moisture from the crawl space.

I'm thinking that the approach would be to install a drain around the perimeter of the crawl space that runs back to a sump (or sumps) and pump from there. I think my idea is similar to How should I install a curtain drain in my crawl space? and the follow ups Curtain drain in the crawl space - Part 2 and Curtain drain in the crawl space - Part 3. But I have a few questions about the design, details, and materials:

  1. First is a design question, assuming that there isn't obvious evidence of a spring will a drain around the perimeter catch most or all of the water intrusion?

  2. How far away from the stem walls should I keep the trench for the drain?

  3. Is a "perforated drain pipe with sock" like this product from Home Depot a good choice for the drain or would I do better with one of the "drainage systems" that seem to the rage with the crawl space encapsulation specialists?

  4. Assuming that the pipe and sock is the right material, is there a rule of thumb for how large the trench should be?

  5. The pipe seems pretty flexible, so I'm wondering about keeping a constant grade. Do I want to do something like lay down a bed of sand and slope that to ensure drainage? Or is an overall pitch all I need?

  6. Would there be any reason not to use the material excavated from the trench to fill in low areas in the crawl space? I was thinking of trying to create either a flat floor or a gentle crown in the center.

  7. Is there anything else I should be thinking about?