|Posted by Moore on October 10, 1999 at 22:00:34:|
|In response to Re: Drainage Problem Please Help!!!|
:If the house is a two story with a slab in part of the basement, and has a crawlspace that will allow you to see dirt too, you are probably experiencing groundwater pressure at the hill side which is trying to percolate into the retaining wall. The lime buildup and the peeling and patches are evidence of this. The lime is being leached out of the concrete block and mortar joints with the water, and when the water dries as a result of the dehumidifier, the lime remains. There are excellent wall paints that are sealers that you can buy from Home Depot which will prevent the water seepage from getting into the interior of the house. But please remember, that you are still trapping that water inside the block, and you'll be looking at a deterioriation problem of the blocks and joints if the water can't escape to a lower level. The french drain could be as expensive as you are hearing if you are in an exclusive neighborhood, and access for machinery is a problem. Please understand that if the retaining wall is prevented from allowing the water to escape, hydraulic pressure could build up in the rainy weather, and push the whole house structure. This is exactly what happened in the Laguna Beach area last year after the fire, and this happens every year to houses in Malibu to San Diego. You don't say where in Southern California you are buying, but I will be willing to look at the situation and make an estimate, based upon your wishes. I have more than twenty years experience in drainage and hydraulic pressure, and can probably offer some solutions.
You could possibly core holes through the retaining wall and horizontally drill french drain like structures.
e-mail me if you want to engage in further discussions, and I'll call you and offer some potential drawings that you might be able to consult with your local Department of Building and Safety with.
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