View Full Version : Parameter loop in slab duct system with water
10-26-2006, 03:13 PM
I was curious to know if there is some type of product out on the market to reline a in slab duct work. I am thinking no but yet again I am still new to the hvac industry. The reason behind this question came about because, I have run into a in slab parameter loop duct work that will have a shallow amount of water in it after a rain storm but will go away with time. It is definitely coming from ground water that seeps threw the slab during a heavy/long storm or such. The only solution to this problem that I can think of is, Try to get runoff water to flow away from the house and/ or install a stump in the ground floor to help keep the water level low under the slab. Other then thatů..install a new duct system
10-26-2006, 05:02 PM
extend your downspouts out at least 10ft!
slope the dirt to be 6" higher beside house than 10ft out.
is the slab perimeter insulated?
I think it would be wise to have a drain pipe below the lowest point of the foundations -- into a sump if necessary. [my Mom did this in 1947 to solve water problems in a basement! -- I did same in 1987.] doing this will also reduce the amount of water vapor seeping up thru the slab --
10-26-2006, 06:44 PM
have seen some have luck with exterior drain system to a pump or just run out to street. have seen a few houses that only solution was overhead duct system and fill slab with cement. willingboro nj is almost all slab duct systems except the sections with radiant heat. there are some places in town that the underground springs just pop up were they never had trouble before. i have heard of companies that reline water mains and thought that may be possible, just never looked into it any further.
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