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Minotaur1001

12:00AM | 08/30/04
Member Since: 08/29/04
1 lifetime posts
Bvbasement
Hello,

I am having serious problems at my home. The foundation is basically concrete slab on grade – reinforced with rebar – built in the mid 1970’s. The Living Room and Family Room are both an eight-inch step down form the rest of the first story rooms.

Over the past couple years we've noticed our five-inch white oak hardwood floors warping. There were lots of ripples and swells across three or four planks as high as three inches. We expected the wood was put down with an insufficient water barrier.

About six weeks ago we ripped out the floors and found they were installed properly. We performed calcium chloride tests and the results indicated very high amounts of water vapor transmission through the slab - two or three times higher than acceptable.

The water is NOT coming from a source in my home or on my property. It may from a neighbor who has been over-watering for years or it may a natural oddity.

Do you have any suggestions on how to seal the slab to an acceptable state?

Should I put hardwood back afterwards?

We are located in the San Fernando Valley area of California, in a flat area with no slopes or hillsides adjacent to the property. The property closest to the problem rooms does sit higher than mine and small grassy area between the homes does slope toward my home.

PLEASE HELP?

chorlton

06:14PM | 08/30/04
Member Since: 08/29/04
35 lifetime posts
If you are sure the problem is vapor/moisture transmission through the slab, all i can suggest is the application of a chemical sealant to the slab. If in any doubt, still check for leaky drains etc. Depending on the exact conditions outside, a french drain may be of some help.
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