Problem is... water is still pushing up through microscopic cracks + through the joints made during the trench digging for this new french drain; enough to make small puddles 3 or 4 days after each heavy rain.
Contractor used the 4" black corrugated pipe - I think it is clogged; water pours into each sump from around each pipe - not through it.
What to do now? I can call them back here (warranted for 10 yrs.), but I think using slotted PVC pipe would work better than the black corrugated.
We have high iron + silt content in the groundwater here. I heard somewhere that iron eating bacteria can be to blame for clogging french drains.
Anyone? Any help is appreciated!
p.s. if our electricity goes out, I get about 18" of standing water in the room! How come this water wasn't present during original construction just 5 years ago?
p.p.s. my house was built on an old stream bed (since re-routed decades ago).
[photo shows about 6" of water and UGL Drylok covering the trench for the french drain]