Feb 15, 2017
1) Keep your gutters and downspouts clean and properly connected. Their purpose is to carry water away from your house; clogged, disconnected, or leaking gutters and downspouts allow water to drain up against the foundation and into your basement.
2) Make sure that the soil around the perimeter of the house is sloped to drain away from the foundation. Why? see #1 above! The soil grade around new homes often settles quickly, causing water to pool right up against the foundation wall. Check the grade and add soil if needed!
3) When building a new house, install exterior AND interior perimeter drain tiles; purchase the best waterproofing system you can afford ("black tar" isn't enough!) and backfill with gravel.
4) Install and maintain a sump pump, connected to the drain tiles. This'll drain away any water that makes it to the bottom of the foundation wall before it has a chance to get into the basement. Install a battery back-up system - if it's raining and the power's out, the sump pump doesn't do any good!