Rain screen for stairs


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Old 02-02-18, 08:46 AM
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Rain screen for stairs

We have a two story stairwell at our ADU.
Nice cedar wood everything. Unfortunately, wide open to wind and rain on 3 sides.
When it rains and winds blow, water is pouring down those stairs.
I have pic attached, not the best but gives some idea.
I sealed wood but it's aggravating, to walk up those stairs in gusty rain flying into your face.
I started thinking about creating some sort of rain screen, to prevent most of this. Surely, some sort of huge panels can be installed but I have no intention to turn this into major construction and expense. Also, my builder skill is not up to par with making framing and such.
There are several things to keep in mind.
1. It gets WIND. Back side in the pic is open to elements and we can get 50-60 mph gusts. So whatever is installed, being a large sail, basically, has to be able to withstand that.
2. Same back side actually, on a sunny day, has Mt Rainier view. Not that I am there days long enjoying that view but, it's nice.
3. Got to be reasonably decent looking.
I started thinking about using wind screen for fences for this purpose. I will let some rain through, of course, but it won't go far. My chicken runs are fenced that way and rain doe not really get past mesh. Small splashes I don't care about.
Privacy fence can be chosen in light color, matching house appearance. It can be ordered in customized sizes. It cna be chosen in various level of transparency.
It can be easily dismantled if say potential buyer does not like it. From my experience, privacy screen is VERY durable.
Of course, on the back side at least, there will have to be some sort of wind support frame installed. Black pipe, for example. So that screen rests against it when wind blows.
I can do something like that and total won't be that much.
I am open to suggestions. I am OK with looks. Like I said, if I need to take it down, it's an hour job.
 
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Old 02-02-18, 12:26 PM
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I would consider a fabric shade sail. It would allow some light in and allow you to see out but block the bulk of the wind and rain. I have had very good luck with Tenshon sails and they can make them to any size you want.
 
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Old 02-02-18, 12:35 PM
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Thank you for link. Basically, I do have a sound idea?
 
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Old 02-06-18, 03:57 AM
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When you mentioned 50 to 60 MPH wind gusts, that raised some flags for me. I don't see much lateral wind resistance if the wind is coming from the back and you basically add a big sail. That may be why all those openings are there now, to let the wind go through. I think buying 2 to 3 hours of a structural engineer's time would be money well spent.
 
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Old 02-06-18, 04:50 AM
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The Tenshon sails will withstand the wind. The bigger question is whether or not your anchor points will but you'll have a similar problem with anything you use to close the openings. At least the sails will let a some percentage of air bleed through.
 
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Old 02-06-18, 05:42 AM
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No doubt that the sail and the connections will resist the wind. The manufacturer will be able to suggest what connections to use, I'm sure.

My comment was looking at the existing structure. Depending on how the wall was built, how the stair is built and anchored, and how the roof structure is anchored, there will be some lateral resistance. Just don't know if it would be enough without an engineering analysis. Don't mean to scare anyone unnecessarily, but I've seen too many things go horribly wrong during my career as an architect. Add to that that I had a strong background/interest in structural engineering and, well ....
 
 

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