Waterproofing under a deck


  #1  
Old 04-08-02, 08:28 PM
rodman
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Waterproofing under a deck

I want to waterproof the floor of a deck. I would like to build a 3 seasons porch and a storage shed under this deck and keep everthing dry. What type of materials should I use? ( please identify materials). This deck hasn't been built yet so our window of oportunity is large I hope. Do you have any Pros and Cons to this idea? Would you suggest using a roofing material than nailing deck boards to that or building two joise's. Also keep in mind I am from the Midwest and we see alot of snow and rain and heat.

want to bulid soon. rodman
 
  #2  
Old 04-09-02, 01:47 PM
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I have done quite a few of these, especially around lakes. Usually you build the deck first. Deck boards and all. Then cover the deck boards with rubber roofing. Then indoor outdoor carpet is laid over the rubber roofing. These decks have all been in 20 below country with lots of snow. Not a problem if done correctly.
 
  #3  
Old 04-11-02, 08:05 PM
rodman
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Water Proofing under a deck

Jack I appreciate your reply. But were kind of set on wooden deck boards for the deck. The question is would I be able to build the deck as you say. And than build a roof under the platform. Have you seen this done before?
Still looking for ideas.
Rodman
 
  #4  
Old 04-12-02, 01:21 PM
demerick
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waterproofing under deck

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Last edited by twelvepole; 02-28-03 at 10:42 PM.
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Old 04-13-02, 11:22 AM
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I guess you can really do what you want to do, but I doubt if you could really completely keep the under room of your deck water tight without building it separate with its own roof, if you did not do it like I mentioned. Good Luck
 
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Old 04-15-02, 11:46 AM
demerick
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waterproofing under a deck

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Last edited by twelvepole; 02-28-03 at 10:40 PM.
  #7  
Old 04-16-02, 01:28 AM
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Cool

If you want a "normal" wooden deck over a waterproof area, an alternative is to do what I did when I built my "dried-in" boathouse with an overhead 12'X24' deck.
I framed it up, building a built-in slanted aluminum roof that drained to one side of the boathouse, and then used joist hangers, deck joists and decking for the normal deck above the built-in roof.
Since I now can't get to the roofing except from underneath, I went with rust-proof aluminum instead of galvanized. I suppose you could go with corrugated plastic roofing, as well.
Caulk heavily between the aluminum sheet overlaps as you install them. You can use flashing and roofing tar to seal the roofing at the wall, as you normally would.
I had the extruded aluminum roofing custom-cut to length.
The boathouse has 7' p-t T-111 plywood walls on three sides, and unless there is a major blow through the open end, it is about as dry as it can get.
More like a "boat garage" than a boathouse.
Where there is will there is a way. LOL
Mike
 
  #8  
Old 04-16-02, 05:28 AM
rs_petty
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HGTV to the rescue

The HGTV show Fix-It Up just did this last weekend. They used a PVC vinyl to essentially case in the joists then a runner between the joists to catch the runoff into a gutter system. Pretty clean install. Check their website and you can probably get the manufacturer or other details.
 
 

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