![]() You want it to have as much free area and possible pathways to allow water flow through it. The geotextile greatly impedes water flow.Silt and sediment will flow with the water and ultimately, may either clog the geotextile, or bypass it (through it if its a broad enough pores, or round the open end if left open).If I set the pipe directly on the non-woven fabric, the water would get carried away sooner, no? Why is that extra 3-inches necessary? This will act as bedding for the drainage piping.īut why? Wouldn't this mean that the water has to climb higher before entering the pipe? This would allow for more pooling and absorption by the soil, thus higher likelihood that the water will still reach my foundation walls. ![]() Pour and compact about 3 inches of gravel or landscaping stone along the bottom of the trench. My question is: I've read several articles and seen some YouTube videos that suggest adding a 3-inch bedding of rock underneath the PVC pipe, like step 4 in this article. (I think this is all best practice, but feel free to correct me if I'm wrong) ![]() I'm using a 4" perforated PVC pipe to carry away the water at a slope of 1 vertical inch for every 10 horizontal feet. I'm planning on using some non-woven Geo-textile fabric to line the walls and bottom of the trench, and fill it up with river-rocks. I'm digging a 12"-wide trench 2ft away from the foundation wall, and 2ft deep. The solution I'm going with is a french drain. This water trickles through mini cracks in the foundation, and it's leading to lots of puddles inside: ![]() 4 feet of it is inside my property line, but my neighbor has a wide grassy driveway that's also contributing. There's dirt, mud, and vegetation outside of my foundation wall, and it's absorbing lots of rainwater. I'm having issues with a leaky basement in the Portland area. ![]()
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