The area under a tall deck can offer valuable living space, but in order to make this work, you need a deck drainage system. There are a variety of options, from undermount systems that create a finished ceiling and a drainage plane, to over-the-joist systems that include waterproof decking or a membrane material to redirect water.

i have a customer looking for an under the deck drainage system. i have installed the one from lowes..ugh! cheap looking. this customer house is 3/4 million...

Under Deck Drainage Systems - Decks.com …

Total time: 6-8hrs Difficulty: Novice Cost: $300

Inexpensive roof panels keep it dry down below

Simple Under Deck Rain Catch, Drainage: I was looking for a low cost way to collect rain runoff from under my deck while creating a nice, dry storage area. You can get something professionally done that looks super nice, but this is a pretty concealed spot, so I was not concerned as much…

Our deck was in good shape structurally but was not aesthetically pleasing. You may remember from my earlier blog post that I painted the deck above with solid…

How Do You Waterproof Under An Existing Deck? While new decks have multiple waterproofing options (waterproof composite decking, decking with watertight flanges in the hidden fastener slots, etc.), an existing deck is best waterproofed with an under-deck drainage system. Undermount or overmount drainage will help create useable, dry space underneath a deck. However, there are some key differences to note between these two under-deck systems. Undermount Drainage System: This consists…

DIY Under Deck Roof and Drainage System Part 1: What building materials to use for waterproofing. How to build, pitch, and drain step-by-step