33+ years in ground water drainage penetration/ management systems & foundation water sealing. French drains, drainage culverts, berms, Channel drains, surface & below grade ground water penetration/ mitigation systems. Building enveloping. Positive & Negative Side water sealing of foundation, retaining walls, basement, garage. AMFAS works with client to accomplish project goals within client budget. AMFAS forensically documents before, during after project. Cover Los Angeles, Orange County (So.Calif) and other. Up to 10 year manufacturer's warranty. Client and Professional References upon request. Licensed and bonded. Certified applicator. Quality Assurance Consultant, Certified Technical Trainer.