UV resistant rainscreen WRB...

[Lavrans]

OK, upon the recommendation of NWArchitect, I'm posting this question.

I'm building a chicken coop. Not just any chicken coop. I'm building the nest & roost boxes, they will integrate with aluminum deck grating made into the outside enclosure.

So, the construction of the nest & roost boxes is, essentially, a SIP; 1 1/2" rigid foam sandwiched between 1/2" plywood- non-grooved T111 on the inside, CDX outside. It gets a WRB, then furring strips, then clad. Cladding on one is horizontal 1x4 CVG Cedar with 1/2" gap between. Other is horizontal Hardipanel cut to 16" strips, installed with 1/2" gap between (unfortunately they only want smooth, which means I couldn't buy the pre-cut 16" soffit material that only comes in cedar mill & stucco finishes).

So, short story long, the architect spec'd the WRB as "Grace Ice & Water shield, granulated". Which doesn't exist. But, what he wants is a UV protected peel & stick under the rain screen.

Has anyone out there done this type of rain screen, and what have you used as the WRB?

[MarkMc]

Look for Grace Basik.

Archie chicken coop; must be some high end roosters.

[davenorthup]

Look for Grace Basik.

Archie chicken coop; must be some high end roosters.

Took the words right out of my mouth - that rain screen detail was used here on our new library. I knew the framer but he did not know how that was all detailed so I do not know what they used as a WRB. Likely felt.

We use a granulated Ice and Water guard - the name escapes me - but like the Grace it is only suitable for short term to the sun before the UV starts to take it's toll on it.

[Lavrans]

OK, here's the coop all installed...

Side views

[Lavrans]

...and a frontal

[frenchie]

Too late, I guess...

I finally found the bookmarks I was looking for, the other day... it's vaproshield who make a flashing tape in plain back, highly UV-resistant, deliberatly designed for open-rainscreen details. VaproTapeUV:

http://www.vaproshield.com/products/wallshield/
(scroll down a bit for the detail)

[Lavrans]

Too late, I guess...

I finally found the bookmarks I was looking for, the other day... it's vaproshield who make a flashing tape in plain back, highly UV-resistant, deliberatly designed for open-rainscreen details. VaproTapeUV:

http://www.vaproshield.com/products/wallshield/
(scroll down a bit for the detail)

Yep- their black WRB is designed for that in addition to the tape. I like their products, but it's really hard to get in small amounts.

[NW Architect]

Lav - you need one more photo - showing the coop in context of the elevation of the house. Looks pretty sweet, actually.

[Lavrans]

OK, here you go- this is the best shot I could get with my phone. There should be some better photos coming my way in the near future, and the architect may be working on getting it published somewhere. But, for now...

[NW Architect]

Nice house. (Good tea)

<. . . . its a classical reference>

[mcbridecarpenter]

Hi guys--nice coop, Lavrans!

FYI, I thought of Vaproshield too, but Vaproshield is insisting we use two layers of their product for an upcoming rainscreen job with 1/2" gaps betw. boards, because of their concerns about UV exposure on a single layer. For that reason, I didn't feel like citing it as a UV-resistant WRB would be accurate. --Nate

[Dick Seibert]

Lavrans:

Is that chicken coop in an urban area? When I was a kid I grew up hearing roosters in the morning, then all areas around here outlawed the keeping of livestock, particularly roosters crowing. I recently read that the City of Berkeley has allowed them and people are keeping chickens in the middle of the city again, what about people who work hours that require them to sleep in the morning? What's ever happened to zoning laws in this brave new world?

You know this might be an all time classic JLC thread, in future generations when people ask how contractors survived the Great Depression II, they can look here and see that at least one industrious contractor went from building homes to building chicken coops! Allan, are you listening?

[NW Architect]

In most of the communities in and around Portland, one can keep up to X number of chickens in a backyard. Other requirement apply. chickens yes, roosters, no.

[ThingOfBeauty]

we're ALLOWED to have roosters, but when we were chatting about getting chickens, our neighbor "allowed" as how we had better not!
But, to the subject at hand: What about aluminum foil and black paint? Or, just the paint on the plywood? Probably too damp in Portland but I think that would probably work around here, periodic wetting and drying but survivable.

[Lavrans]

we're ALLOWED to have roosters, but when we were chatting about getting chickens, our neighbor "allowed" as how we had better not!
But, to the subject at hand: What about aluminum foil and black paint? Or, just the paint on the plywood? Probably too damp in Portland but I think that would probably work around here, periodic wetting and drying but survivable.

Well... yeah, probably acceptable to the architect either. After all, he spec'd granulated grace ice & water... He did allow that if I couldn't find granulated peel & stick that I could use regular grace Ice & Water shield, or roll roofing. I wound up using Winterguard granulated. It's good stuff.

I think that the construction was a bit of overkill. With the nest house being completely open on one side, I think the insulation could probably have been eliminated there. The roost box, though, is getting a heater. That one might have been better to build with the insulation outside of the WRB, which would have protected the WRB? But then I'd need UV resistant insulation. :-)

This is in Seattle, in a very nice neighborhood. There is a total of 4 chickens, 3 layers and a Bantam. I don't think they have any roosters- it's pretty common to allow chickens but not roosters in urban settings. No problem with crowing.