Drainage composites play an important role in building envelope protection. Above-grade drainage panels help channel water away toward drains to eliminate build up. Below-grade drainage panels help serve a number of purposes: One, they help divert water away from the structure to designated discharge points. Two, they help protect the waterproofing system from additional damage. Three, drainage strips can help collect and expel methane gas and other contaminants from underneath structures. EPRO provides a wide variety of drainage composites to address a number of different conditions.