For most soil conditions, how far away from the house is it necessary to carry the rainwater from a downspout to avoid a damp basement?
My house and a lot of houses have 3 foot cement or plastic troughs that take the water a little over 3 feet from the house. Is that normally enough??
I live in suburban Baltimore, where the soil is what I would call normal dirt, though i guess there is quite a bit of clay too, in that much of it a couple inches down slices like a fruit cake, without crumbling, but not like a fruit cake in that much of the dirt that I can "slice" has no graininess.
I ask because I finally noticed that when it is barely raining, the water in the downspout doesn't fly out like it normally does, doesn't rush out fast enough to span the one half inch between the spout and the cement trough, and it dribbles on the ground very near the wall. I can't move the cement closer so I've made a bib, a 5 inch metal trough to go under the downspout and over the cement trough, to more than span that half inch. But can I likely expect that the basement will dry out now that all the water will be diverted to 3 feet from the house??
I myself am in no hurry to know, but I need to assure my new, very pleasant neighbor in the adjoining townhouse.
She tells me that a corner of her basement is damp, and her handyman or father or someone is coming next week to put something in that will direct the water from her downspout that's right next to mine, to direct it farther from her house, and he's going to do the same thing for me, but she was going to ask me first! :) The thing is, she already has a 20 foot black plastic 5-inch diameter corrugated tube that does this, so I think she is being tactful and really means me!
I told her I would fix it myself, and I want to be good to my word.
(Where I grew up, the downspouts went into drains that went out to the street. That's a lot nicer.)