Waterproofing Your Deck

November 1st, 2010

With all the rain we have had in the past month, Wilmington, NC home builder Mark Johnson Custom Homes would like to share with our readers our method of waterproofing a second story floating deck that has a finished ceiling beneath it. 

 After framing the upper deck subfloor with a slope, we install a rubber membrane on the subfloor that wraps up and over any doorways leading to the second story floating deck.

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The rubber membrane is then installed to completely cover the subfloor.

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Any penetrations coming through the deck floor (such as handrail posts) need to be wrapped with the membrane.

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Next, we install the floating deck system. This involves placing (but not fastening) treated 2×6 boards flat on the membrane. The reason it is called a floating deck is because it isn’t fastened to the framing beneath. We then cut treated 2×4 boards down to basically form a wedge. The purpose of this is to keep the finished decking where you stand flat and level. Remember that the subfloor decking still slopes under the membrane so the water that drips through the deck boards will still run down the membrane and away from the house.

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The picture below is the finished floating deck before paint and handrails are installed.

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This view (before paint and handrails) shows the finished ceiling beneath the second story floating deck.

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One Response to “Waterproofing Your Deck”

  1. call center outsource Says:

    Waterproofing your deck is important because like any homes, it will age and rot and having an added protection to aging is a good one.