What do you recommend for the underside of a deck?

Decks have open slats that cause drip lines and cause splashing of dirt up against the cladding of a building and windows. Therefore, it is recommended to install geotextile over the sub-base to help prevent weed growth, then a layer of a clear stone product. A crushed ½” crushed granite clear stone or ¾” round natural stone are the recommended products for this application. For each of their advantages, the clear stone crushed granite products bind together better than round particles and therefore do not roll as the round pea stone does. The round pea stone has a more natural, softer appearance, although the small crushed stone looks great and contemporary as well.