Heavy mountain precipitation and perched water tables cause groundwater to seep through foundation block walls and pool across dirt crawlspace floors. We install interior perimeter French drain networks bedded in washed aggregate connected to cast-iron sump stations with battery backups.
When rainwater saturates mountain slopes, hydraulic pressure forces water through masonry foundation walls and footing joints. Trenching the interior perimeter below footer level intercepts subsurface flow before it can pool on crawlspace floors.
We excavate deep perimeter trenches, line them with 4-ounce non-woven needle-punched filter fabric, lay perforated smooth-interior corrugated drainage pipe, and surround it with clean washed #57 granite stone to prevent silt clogging.
Water channels by gravity to sealed polyethylene sump basins equipped with commercial 1/3 HP or 1/2 HP cast-iron submersible pumps capable of discharging 3,000+ gallons per hour through check-valved PVC lines.
Mountain severe weather frequently knocks out grid power during flash flooding. We install secondary battery-backup pumps with smart digital chargers that keep crawlspaces dry for days during blackout events.
Yes, by relieving hydrostatic pressure below the footing level, the drain collects wall seepage immediately and channels it safely to the pump basin.
Our dual-pump systems include an industrial DC battery backup that automatically kicks in when grid power fails, pumping up to 10,000 gallons on a single charge.
We route schedule 40 PVC discharge pipes outside to gravity daylight exit emitters safely sloped away from home foundations.