What are possible reasons that a basement would flood after snow melts?
January 30, 2014 11:47 PM Subscribe
What are the potential reasons you'd get water seeping into a basement after melting snow, but not after hard rains? Assume floors and carpets are drenched and soggy after a big snow melts, with water evident beneath linoleum, but there is not actual standing water.
Would this be proof of a foundation crack?
Also assume soil/earth outside the home is of a somewhat nonabsorbent quality, so that there are standing pools in the yard after each rain. Does this affect the diagnosis?
This is happening all over ME. The water can't go anywhere.
posted by Mr. Yuck at 3:26 AM on January 31, 2014
posted by Mr. Yuck at 3:26 AM on January 31, 2014
Water from melting snow has to flow on the surface or migrate downward. The two factors affecting the migration are the absorbency of the soil and the level of the water table. Even with a nice sandy soil that provides excellent drainage, when the water table is high the water cannot go anywhere.
The other factor in basements is seepage of water through the concrete blocks that make up the walls. This can be remedied (in dry conditions) by contractors.
posted by yclipse at 4:42 AM on January 31, 2014 [1 favorite]
The other factor in basements is seepage of water through the concrete blocks that make up the walls. This can be remedied (in dry conditions) by contractors.
posted by yclipse at 4:42 AM on January 31, 2014 [1 favorite]
Water from melting snow pools in one location, until enough snow has melted for it to run off. Pooling water has time to work its way into small cracks, which rain water would just run over.
posted by Flood at 5:53 AM on January 31, 2014
posted by Flood at 5:53 AM on January 31, 2014
Check your downspout extensions and clear the snow away from them. Shovel short canals leading away from them. Thawing water from the gutters probably isn't being carried the requisite 3-4 feet away from your house.
posted by klarck at 6:11 AM on January 31, 2014
posted by klarck at 6:11 AM on January 31, 2014
Perhaps the cold makes the material in your walls contract and makes cracks expand allowing water to seep more.
posted by The 10th Regiment of Foot at 7:17 AM on January 31, 2014
posted by The 10th Regiment of Foot at 7:17 AM on January 31, 2014
A quick, heavy downpour has time to run off with sufficient drainage. Melting snow slowly seeps down and has more potential to seep through basement walls. If you see where the moisture is you can better diagnose the cause. Pools and wet spots would indicate localized cracks and areas outside that the drainage needs attention. General moisture along the walls could be attributed to the extra moist earth on opposite side and warmth from indoors causing condensation, or just simply seeping through the porous material of the wall itself (concrete, brick, etc) If all you have is a little surface seepage an update on wall sealant might be in order.
posted by imaluma at 7:25 AM on January 31, 2014
posted by imaluma at 7:25 AM on January 31, 2014
This thread is closed to new comments.
Those are a few suggestions.
posted by salishsea at 12:30 AM on January 31, 2014