Waterproofing a wood shed

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  #1  
Old 09-17-04, 07:51 AM
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Cool Waterproofing a wood shed

Thanks for all the suggestions on the shed roofing (earlier posting).

I've nailed 4x8 plywood sheets to the 2x4s making up the frame of the shed and now I want to waterproof the shed.
Is siding my only option here?
Ideally I'd like to just get a power sprayer and use some waterproof paint and just spray the whole thing with waterproof paint and " seal it up" that way?

Is this possible or do I have to nail up all that siding?

Thanks,

-MC
 
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  #2  
Old 09-17-04, 08:01 AM
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Did you look at T1-11 treated siding sheets before you nailed up plywood??
Not much more in dollars but much better against the weather.
T1-11 only needs to be stained - color of your choice.

fred
 
  #3  
Old 09-17-04, 08:20 AM
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ohh noo

I Wish I'd known about this T-11 stuff but alas I've already bought $300 of non returnable plywood, ouch, so I might as well nail it up

I take it the painting option isn't workable?

-MC
 
  #4  
Old 09-17-04, 09:13 AM
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Is it pressure treated plywood or possibly exterior grade with waterproof glue??

fred
 
  #5  
Old 09-17-04, 09:39 AM
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not sure what kind of plywood

it was $15 for a 4x8 sheet, doesn't have the "greenish" pressure treated look to it.

I'd just assume is the minimum grade plywood commonly used to nail siding onto.

If I just left it there (no siding), I'm sure it would take a while for the water to erode it anyway since it's 3/4" thick?

-MC
 
  #6  
Old 09-17-04, 10:00 AM
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forget siding, I'm gonna spray on a waterproof stain

just got off the phone with the home depot, Behr makes a deck/fence stain that can be sprayed (sprayer=$30) on the wood and keeps out water for 5 years (horizontal) 10 years (vertical)

gonna go pick up some after I finish my 9-5 grind for today,

-MC
 
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Old 09-17-04, 10:49 AM
ukchris
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I am planning a 12' x 16' shed and had intended to use exterior chipboard then cover it, HD seemed to have a finished material in 4' x 8' sheets with a textured side that looks like a green panelling. It wasn't chipboard though, more like a wallboard. Is this better/worse than T111 mentioned above?

What is the external side of T111 like? Would it need finishing/treating or does it look okay? Do they have it at HD?

Chris.
 
  #8  
Old 09-17-04, 02:04 PM
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MC,

This may be too late, just got back home.
Pls don't get the B product, it is usually crap - as bad as the T product.

Even the Flood CWF-uv is better than the B.

Chris,

T1-11 is also called barn siding, it has vertical grooves. HD should have it.
It is made for exterior purposes. It looks okay unstained but will accept and probably should be stained.
I built my shed with it in '93 and spray stained it. It's been fine.

fred
 
  #9  
Old 09-17-04, 02:43 PM
ukchris
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Just been in HD, I didn't see any T111 but they had something called "SmartSide" siding. It is in 8' x 4' sheets 3/8" thick. One side is textured to look (a little) like 9" strips, it's a pale green color on the finished side, about $18 a sheet.

This stuff looks reasonable if I could use just that (no plywood underneath) but would that be string enough? Should I put it on top of half-inch ply?

Otherwise I guesstimated that I could probably do a 12' x 16' shed in vinyl siding for about $300 which, if I have to put plywood on anyway I may as well do.

Need to find some T111 to have a look at I guess.

Chris.
 
  #10  
Old 09-17-04, 05:31 PM
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The advantage to T111 is that you get your code structural strength and siding at the same time rather than using OSB or Ply CDX for structural and then siding over it for protection. The disadvantage is T111 tends to split and crack from exposure much more than siding. I would recommend painting what ever siding you have as stain won't last but 1/2 as long. You wont be able to see if it is degraded as easily as paint either. MC - if the plywood is cdx or acx or anything with an x (exterior grade) in it, you can paint it and caulk it and it should be sealed O.K. Ukchris the T111 is always roughsawn surfaced and comes in, no grooves, grooves every 4" (vertically) and grooves every 8" (the most commonly used). I would paint it with Pittsburg Paints permanizer plus (primer @$40/gal) and then topcoat with satin latex (any brand). This will keep the wood from getting surface splits and it will last quite a bit longer.
 
  #11  
Old 09-17-04, 07:45 PM
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I agree with Jeff on just about everything.
My T1-11 shed, as mentioned, was put up in '93, and spray stained/coated with a (cheap) acrylic solid stain. Not touched since!
It has shown no cracking or splitting of any kind.

fred
 
  #12  
Old 09-20-04, 08:42 AM
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Originally Posted by ukchris
Just been in HD, I didn't see any T111 but they had something called "SmartSide" siding. It is in 8' x 4' sheets 3/8" thick. One side is textured to look (a little) like 9" strips, it's a pale green color on the finished side, about $18 a sheet.

This stuff looks reasonable if I could use just that (no plywood underneath) but would that be string enough? Should I put it on top of half-inch ply?

Otherwise I guesstimated that I could probably do a 12' x 16' shed in vinyl siding for about $300 which, if I have to put plywood on anyway I may as well do.

Need to find some T111 to have a look at I guess.

Chris.

3/8 should be plenty strong to keep everything straight on a shed. 7/16 is a house construction standard. I think that vinyl siding is overkill for a small shed. The advantage, of course, is that you never have to paint it. But the amount of work involved is installing it is a downer. Also, keep in mind that vinyl siding is designed to let water in and out, so you really need some sort of house wrap stapled to the wall sheathing before you can cover it with vinyl. More work... I'd go with that "smartside" and a quality stain.
 
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