<div>Bob,</div><div><br></div>We installed a rain screen at Presentation Center that John and Dan Smith worked out. It went like this: scratch coat and 1x3 battens, then lathing and three coat plaster.<div><br></div><div>
Although a green screen will weaken driving rain, which can penetrate cracks, windows, etc., I think that the quantity and duration of a heavy rain, regardless of wind strength, has to be considered. If the plaster is permeable, then at some point it becomes saturated. That's why coatings have an appeal.<br>
<div><br></div><div>John<br><br><div class="gmail_quote">On Fri, Jan 21, 2011 at 10:12 AM, Bob Theis <span dir="ltr"><<a href="mailto:bob@bobtheis.net">bob@bobtheis.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
John Swearingen's comment about bending rainscreens brings up an interesting point I'd like clarified: If the primary function of rainscreens is to break the force of the wind, then the "screen" needn't be shingled planks as we generally see, but any manner of screen with smallish openings set away from the wall behind, yes?<br>
<br>
If that's the case, is there any guidance regarding how small the openings should be?<br>
<br>
Yes, yes, it will depend on wind speed, the thickness of the screen, and variables I'd never imagine, but I'd be happy with an oversimplified generality to guide evaluating screen material possibilities. If, for example, I want to make the screen a grill on which I grow vines, how dense would it have to be to work, absent the growies?<br>
<br>
...and my team wants to know how to do the slam dunk home run John Straube mentions.<br>
<br>
<br>
On Jan 21, 2011, at 3:51 AM, John Straube wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I like both mineral slicate paint (which usually has added water repellents) and the slam dunk home run solution of adding a ventilated and drained rainscreen cladding.<br>
A less extreme solution that may work is a siloxane / silane blend which is clear, penetrates into pores and makes the waterproof. Drying can happen faster than with Xypex and thompson water seal (pore blockers, one with mineral crystals the other with organic wax and gum).<br>
<br>
Sent from my BlackBerry®<br>
<br>
-----Original Message-----<br>
From: Darrel DeBoer <Darrel@DeBoerArchitects.com><br>
Sender: <a href="mailto:GSBN-bounces@greenbuilder.com" target="_blank">GSBN-bounces@greenbuilder.com</a><br>
Date: Thu, 20 Jan 2011 23:59:27<br>
To: <<a href="mailto:GSBN@greenbuilder.com" target="_blank">GSBN@greenbuilder.com</a>><br>
Reply-To: "(private, with public archives) Global Straw Building Network" <<a href="mailto:GSBN@greenbuilder.com" target="_blank">GSBN@greenbuilder.com</a>><br>
Subject: [GSBN] Exterior plaster sealer?<br>
<br>
_______________________________________________<br>
GSBN mailing list<br>
<a href="mailto:GSBN@greenbuilder.com" target="_blank">GSBN@greenbuilder.com</a><br>
<a href="http://greenbuilder.com/mailman/listinfo/GSBN" target="_blank">http://greenbuilder.com/mailman/listinfo/GSBN</a><br>
<br>
_______________________________________________<br>
GSBN mailing list<br>
<a href="mailto:GSBN@greenbuilder.com" target="_blank">GSBN@greenbuilder.com</a><br>
<a href="http://greenbuilder.com/mailman/listinfo/GSBN" target="_blank">http://greenbuilder.com/mailman/listinfo/GSBN</a><br>
</blockquote>
<br>
_______________________________________________<br>
GSBN mailing list<br>
<a href="mailto:GSBN@greenbuilder.com" target="_blank">GSBN@greenbuilder.com</a><br>
<a href="http://greenbuilder.com/mailman/listinfo/GSBN" target="_blank">http://greenbuilder.com/mailman/listinfo/GSBN</a><br>
</blockquote></div><br><br clear="all"><br>-- <br><font face="'trebuchet ms', sans-serif"><span style="font-size:x-small"><font color="#666666">John Swearingen<br>Skillful Means Design & Construction<br>2550 9th Street Suite 209A<br>
Berkeley, CA 94710<br>510.849.1800 phone<br>510.849.1900 fax<br><br>Web Site: <a href="http://www.skillful-means.com" target="_blank">http://www.skillful-means.com</a><br>Blog: <a href="https://skillfulmeansdesign.wordpress.com" target="_blank">https://skillfulmeansdesign.wordpress.com</a></font></span></font><br>
</div></div>