A plastic fiber drainage mat rainscreen provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.
What is a Rainscreen System? - Sto Corp.
E-Screen (Drainage Mat) ClarkDietrich Building Systems
Slicker® Classic Rainscreen
Use Drainage Plane to Deflect Water
Build Your House Yourself University--BYHYU - BYHYU