Quote:
Originally Posted by Bear Islander
A house on piers and the deck in question ARE NOT impervious surfaces. They are however "considered" to be impervious surfaces when you are calculating the allowed percentage for a given property. However the bureaucratic wording of building codes intended to limit development do not prevent water from being absorbed by a surface.
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We are not talking about the allowable percentage of impervious surface (you most likely meet that requirement). You stated that your house is not impervious because it is on piers and that is not true. It is about water being able to fall in a straight line from the sky to the ground and its ability to be absorbed by the surface of the ground. Like I said, unless you deal with all the water coming off the house and deck they are imperious surfaces and you are correct, go toward your allowable percentage of such a surface.
The house and deck ARE NOT "pervious" surfaces. The soil below is pervious, the soil under my full foundation is also pervious, but because my house is over the top of it, it is not allowed to react to water how it should and therefore I have perimeter drains to transfer the water to a location that will allow it to leach properly. The soil under your house will not handle any form of heavy surface run off. There is simply nothing to hold it in place.
I have no intension of further derailing this thread as it seams to be a hot botton issue and should be discussed. I was simply correcting your statement as it was written.