Waterproofing under walkout deck


Old 05-27-19, 05:55 AM
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Waterproofing under walkout deck

I have a typical walkout basement with a deck. Under the deck can be a nice seating area. However, I want it to stay dry. The previous homeowner had installed something like this:


Great idea but it wasn’t installed correctly because it sagged and didn’t slope enough and caused water to come back into basement near ceiling.

I’d like to do this again but correctly. One thing I need to solve is a way to clean the top of the “roof”. We have some messy trees and I think that contributed to the previous roof’s demise. Any thoughts out there on how to design this?

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Old 05-27-19, 07:05 AM
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The article you linked to has a section, 3 ways to waterproof your deck. There are 3 products that are listed there that would work for what you would like to accomplish. And yes, none of them will be perfect or maintenance free because of tree leaves and debris that might cause them to back up and leak.
Old 05-27-19, 08:48 AM
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Thanks for the reply. I'm just curious if someone has some unique ideas to modify the DIY plan laid out so there's a way to more easily clean out the top of it. Was considering some sort of hinge approach to lower one end, washout the top, then replace. No clue how to build that properly.
Old 05-27-19, 10:27 AM
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I have a similar type "roof" under a deck at my vacation home. I just use a leaf blower to blow through the spaces between the deck boards above to clear the debris from the "roof" working from the high point to the low point then cleaning out the gutter. Once a squirrel nested in the space and I used a coat hanger wire to pull out the small branches, then the leaf blower.
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