0 Helpful?

Detailing bottom of Roxul Comfort board IS

How are those of you using this product detailing the bottom of the wall where the Roxul is exposed?

I noticed on one post about a project in BC, they used a perforated galvanized channel to encase the bottom of the IS. Does anyone know where to source a channel like that?

I'll be using 3" Comfort board over 1/2 CDX sheathing, over 3/4" x 3" furring strips, then cedar shingles.

Thanks!

Asked by Edward Krause
Posted Aug 8, 2014 3:43 PM ET

Tags:

4 Answers

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.

Edward,

Here are 2 links to installing Roxul mineral wool on the exterior. These photos show the J-channel at the bottom of the Roxul. The only company I've found that has a similar product is Menzies Metal. I wasn't able to find that product when we were building our house, so we just skipped it.

http://www.greenbuildingadvisor.com/blogs/dept/guest-blogs/installing-ro...

http://agreenhearth.com/stone-wool-to-warm-the-heart-and-the-home/

http://www.menzies-metal.com/vent-flashings/perforated-j-channel-rain-sc...

Answered by Lucy Foxworth
Posted Aug 8, 2014 10:52 PM ET

2.

Edward,
Show this photo to a local sheet metal shop and ask if they can bend you some perforated galvanized channel that looks like the photo.

.

Roxul ComfortBoard in galvanized channel.jpg
Answered by Martin Holladay, GBA Advisor
Posted Aug 9, 2014 5:24 AM ET

3.

Thanks very much, Lucy and Martin.

-Ed

Answered by Edward Krause
Posted Aug 9, 2014 10:42 AM ET
Edited Aug 9, 2014 11:17 AM ET.

4.

Edward,
It is a lot easier here in BC. Because our code mandates rain screens, most lumberyards stock a variety of widths and as Martin said will also bend up any other custom sizes. Soffit installers also have breaks and might be another place to try.

Answered by Malcolm Taylor
Posted Aug 9, 2014 11:21 AM ET

Other Questions in Green building techniques

Sun Pump solar heat pump

In Mechanicals | Asked by Peter Schonherr | May 19, 16

Stamped concrete patio near foundation

In GBA Pro help | Asked by Ryan Lambert | Mar 19, 16

Fan Coils and Return Air From Framing Voids

In Mechanicals | Asked by Dan Cullen | May 23, 16

Metal roof and wall assembly in Los Angeles

In Green building techniques | Asked by Claire L. | May 23, 16

Has anyone ever kept sheathing warm and saved labor costs this way?

In Green building techniques | Asked by sean stewart | May 22, 16
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!