Originally Posted By: jmichalski
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Twin home in a very hilly part of the city, about 75 years old. Under the front porch of most homes is what used to be the coal room/chute. Many converted them into part of the basement once they stopped using coal.
This room is under the porch. The ceiling (above grade about 1 ft) is WET, condensation dripping down, from the left front side(adjoining home side) - no leaks can be seen, no wet spots on the front exterior wall, no moisture signs on the adjoining home. Water service pipes enter the home 5 feet below this ceiling. Above area is the unheated front porch.
[ Image: http://www.nachi.org/bbsystem/usrimages/1/100_1220.JPG ]
It hasn't rained here recently, although it snowed about 1/16th of an inch on Sunday. Any gueses as to the water source?
The basement floor in this room sounds almost hollow! The right side of the cement floor is bulging upward like it is going to give birth! A small crack exists, and shinig aflashlight inot it, it loks like there is some empty space below the cement. But why - exterior drainage problems and water erosion? And if it feels "hollow" below, why would the cement bulge up and not down? It's ahrd to see here, but this is what I am talking about . The wet looking part actually bulges up about 5-6 inches.
[ Image: http://www.nachi.org/bbsystem/usrimages/1/100_1221.JPG ]
Last question: Since this room/basement area provides no support to the home directly, and only supports the porch above (which for other reasons may have to come off) what should be the level of concern here?