The other day my basement got very wet, ruined the carpet and padding in the finished area. The unfinished area, bathroom and HVAC room still bone dry. The water is definitely coming up through the floor in a few spots (hydrostatic pressure). There are no visible cracks and only one spot where the poured concrete basement floor has a hamburger sized chunk out of it, but no fishers or cracks in it. The walls are also poured concrete, and the house is about 10 years old. I have no evidence of water coming through the walls or any place else, that would be a slightly different scenario.
My first mistake was calling a company that just wanted to sell me an inside trench system. These only divert the the water INSIDE the wall to a new sump in the center of the floor, doesn't stop mold, insects, radon, or hydrostatic pressure.
So after a lot of research, and considering my specific problems here's my (becoming informed) plan.
1) Hire an independent engineer that specializes in water issues. Someone who is not 'Selling' anything except expert advice, not referrals. Based on his advice:
2) Find a reputable landscaper to reshape my yard to redirect water away from house, install a drainage system (french drain, swale, or rock swale) to the nearest primary storm drain.
3) Ensure gutters are clean and maybe get larger gutters, but ensure the downspouts are far from house.
4) Hire a reputable plumber to snake (clean) my 'storm trap' under the basement floor, to free any blockage.
5) Raise the lip of my window well (egress window), and get a clear cover to put over it.
6) Patch any cracks inside (3M concrete sealer), maybe seal the floor.
Now I've already replaced my sump pump with a Zoeller M98 model (the best), and bought a 70 pint dehumidifier. I also bought a eu200i 2K watt Honda generator if the power goes out (decided after a lot of research this is the most practical solution, and I can use the generator for lots of power outage problems.
I spent hours researching and making this plan because I couldn't find an article like it. Any advice appreciated, and if you know a reputable plumber that can snake the storm trap or a landscaping company, in central Maryland (near Laurel), please post here. Thanks an I hope this info helps someone.