The gist of this gem is that most wet basement problems are surface-water problems. In other words, fix your gutters, punks. With respect to foundation drainage systems, Appendix B helpfully quotes part of the International Code Council’s International Residential Code.
R405.1 Foundation Drainage specifies gravel or crushed stone drain at least 1 foot beyond the footing and 6 inches above the top of the footing with a filter membrane. Drain tile to be on at least 2 inches of rock and covered with at least 6 inches of rock.
R405.2.3 Drainage system specifies a sump at least 24 inches in diameter or 20 inches square, at least 24 inches below the bottom of the basement floor.
R406.2 Concrete and masonry foundation waterproofing specifies from top of footing to grade (1) 2-ply hot mopped felt, (2) 55-pound rolled roofing, (3) 6-mil PVC, (4) 6-mil polyethylene or (5) 40-mil polymer-modified asphalt.