I've been reading a lot of info from Europe on rock wool. It is claimed to be close in R-value to foam and much greener with open vapor. I am interested in using for exterior and basement insulation. Does anyone have experience using rigid rock wool? Thanks.

Views: 410

Reply to This

Replies to This Discussion

Hi Richard,
I'm not sure about your reference to "Ridgid" rock wool. I'm somewhat familiar with Roxul which is a high density cavity insulation and I like it. As for basements, there are SO MANY other considerations, but yes, for a layer inside of some rigid foam panels it looks good.

Bud

Rock wool is available in rigid product, with various densities, depending on application.

There is a product designed as drain board for foundations.

It's available in pipe insulation, batts, and blown in. Although you may have a hard time finding or getting.

Look for industrial / commercial / wholesale insulation suppliers.

It's fireproof & waterproof, lower embodied energy than foam, but has formaldahyde glues still.

I have used a few brands of rigid batts for air sealing and found the Roxul brand better. Roxul is more dense and easier to cut  and we use it frequently for air sealing in areas where foam will not work and some chase areas. Most brands are marketed as acoustical batting,  however I have seen Roxul reps at the big box stores promoting the product for general attic/wall insulation against fiberglass. For attics cellulose is more cost effective and any rigid  batt (rock wool or fiberglass) used in attic insulation  is problematic. Rock wool has great thermal characteristics and does not wick water making it a good choice for basements and exterior applications. My only complaint is rock wool (slag) fibers are nasty.

Thanks Jose

For exterior application do you attach directly or with drainage plane?

I have not used Roxul for exterior applications- only airsealing and basements. Check their website as I believe Roxul offers additional products specifically for exterior applications

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Mike Cerqua replied to Tony Hicks's discussion Slab-on-grade Insulation
" "
1 hour ago
Mike Cerqua joined James Sayers's group
Thumbnail

Marketing Energy Efficiency

Sharing ideas, tools and examples of promoting energy efficiency to consumersSee More
2 hours ago
Mike Cerqua joined Sean Lintow Sr's group
Thumbnail

Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what…See More
2 hours ago
Profile IconMike Cerqua and john mitchell joined Leslie McDowell, BPI's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
2 hours ago
Mike Cerqua joined Michael Stuart's group
Thumbnail

INFRARED THERMOGRAPHY USERS

This group is dedicated to knowledge sharing and discussion of infrared thermography for building…See More
2 hours ago
Mike Cerqua commented on Mike Cerqua's photo
Thumbnail

1468701_10153490382175195_341120974_n

"Getting good use out of our sprayfoam truck! Brought the small cellulose machine and 15 bags for a…"
2 hours ago
Mike Cerqua posted a photo

Our Sprayfoam Truck looking its best...

I dream of a day where all sprayfoam trucks carry equipment like this!
3 hours ago
Eric Kjelshus replied to Elizabeth Guinn's discussion ERV in need of backflow preventer.
"http://www.southwarkmetal.com/product/butterfly-dampers/ I have made my own but some work better…"
3 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service