Perimeter Wall Drains

[extexthai]

Having gleaned lots of very useful information on building here in LOS from this forum, I wanted to give back a little in appreciation....so here it is. A very easy and economical way to do wall drains, especially where yard is back-filled and adjoining land is lower. Using 2" to 3" PVC pipe, cut to fit where they install forms for seal beam where blocks will sit on. Place after rebar is in and before both side forms are in...the pipe will be cut the thickness of the seal beam. Put at lowest possible point. After wall is finished, put gravel in pipe and up to your yard grade, then back fill with dirt, leaving gravel area undisturbed. This reduces pressure on your wall at the bottom when it rains a lot. Additional drains can be put in at grade as they go up with the block. Happy draining....ett

[doglover]

Good advice to slow down or stop the chronic leaning perimeter wall extexthai. Most books on this sort of job would recommend placing landscape fabric between the gravel bed and the dirt to be shoveled in over top of the gravel. Which is to stop the dirt from filling in all the drainage pathways of the gravel bed over time. Is this necessary? Is it available and if so, where?

*If one has filled in paddy land and built a perimeter wall with drainage as mentioned that's a great start. However, when rainy season arrives his rice farming neighbours may not be as excited about the project when ones rainwater starts draining into their rice paddy*

[extexthai]

Good advice to slow down or stop the chronic leaning perimeter wall extexthai. Most books on this sort of job would recommend placing landscape fabric between the gravel bed and the dirt to be shoveled in over top of the gravel. Which is to stop the dirt from filling in all the drainage pathways of the gravel bed over time. Is this necessary? Is it available and if so, where?

*If one has filled in paddy land and built a perimeter wall with drainage as mentioned that's a great start. However, when rainy season arrives his rice farming neighbours may not be as excited about the project when ones rainwater starts draining into their rice paddy*

Firstly, the landscape fabric as we know it in the western world could be like finding a needle in a haystack here in LOS. Having said that, perhaps one could find it in BKK or Chiangmai. Yes, it would be nice to keep the dirt separated from the gravel part, for sure. On mine, I will fill in with back fill, leaving a sloped void at the drainage pipes and fill that in with gravel all the way to the top of grade. In standing water, the solids seem to settle out and not float unless there is a lot of water moving.

Secondly, I would think rice would love the water, even if it is already sitting in it. Sort of like, having too much fun? I really wouldn't think that would be a problem if you are indeed, next to a rice paddy like I am. If it is someones lum-yii orchard, that might be a problem. Something to consider, absolutely. ett

[doglover]

Firstly, the landscape fabric as we know it in the western world could be like

finding a needle in a haystack here in LOS.

I figured as much. I have not seen it at Global house, etc.

Secondly, I would think rice would love the water, even if it is already sitting

in it. Sort of like, having too much fun? I really wouldn't think that would

be a problem if you are indeed, next to a rice paddy like I

am. If it is someones lum-yii orchard, that might be a problem. Something to

consider, absolutely.

ett

I completely agree that the rain water runoff from ones land into the neighbours rice paddy should not cause any harm once the rice seed or shoots have established themselves. What I was meaning to say is that the neighbour may not like the idea even if there is no harm caused. My neighbour opposes the idea and lets me know by shoving blockage material into the pipes from his side. They are the kind of people that slowly dig away at the berm seperating the paddies on the property lines to make their a land a weany smidgeon bigger every year. So wether or not it makes sense or causes harm may not be the issue. So all I meant is it best to share your plan with your neighbours first and make sure all will be "sabai sabai" before going ahead.

What I will now have to do is build a drainage trench parrallel to my fence, on this troublesome side, and have it drain into our rice paddy in the back.