- GreenSpec Insights
- Energy Solutions
- BuildingGreen's Top Stories
- BuildingGreen Talks LEED
What do you do when a green product doesn't live up to expectations? Here at BuildingGreen, we really want to see green building products succeed in the marketplace, and make it easy for professionals to find the best of the best in our GreenSpec guide.
But when we see something substandard, we feel it's important to point it out. To win the mainstream over to sustainability, we have to deliver on promises of reduced environmental burdens along with superior performance.
A little while back, I took Bonded Logic to task for flaws its Ultratouch cotton batt design and installation process.
The worst flaw I found was that the product is too thin. After being compressed in bags for shipping from Ultratouch's Arizona plant, the post-consumer-denim cotton batts never regain their "loft." That means that insulation is going into wall and ceiling cavities with air spaces around it. Air that is completely stagnant insulates very well--at R-5, even better than Ultratouch's R-3.7. But air in wall cavities moves around with convection, contributing to heat loss and crippling the nominal R-value of the insulation. (Read more here on How Insulation Works.) I also found that the batts were too wide for 16-inch-on-center KD 2x4s (standard lumberyard kiln-dried sticks), leading again to air spaces due to poorly fitting batts.
Thirdly, I complained that the batts were really hard to cut. This was especially frustrating because the ill-fitting batts required a lot more cutting than a standard fiberglass batt.
The good news is that Bonded Logic is now perforating its batts at standard widths so that they are easier to cut for proper fitting. They haven't announced what those widths, are, however, and it seems like a tough problem. How standard are the sizes of the off-size stud cavities found in our buildings? Perhaps in new homes with designs optimized for manufactured material use they are standard, but in the retrofits and custom jobs that a lot of builders are doing today, I am not sure how useful these perforations will be.
Another piece of good news, according to a spokesperson I heard from, is that Ultratouch will also soon be available in different widths according to whether you're using wood or steel studs.
However, Bonded Logic still doesn't seem to get it when it comes to installation quality. Whether you're using fiberglass or cotton batts, exact fitting to cavity sizes is key. That means cutting insulation around electrical boxes, wiring, and also cutting it for the occasional cavity of a different dimension. What I've seen of this installation video is pretty good, but there's a flub in the Bonded Logic video publicizing its new perforated batts. As the screen capture shows, the installer is placing a batt in a cavity with complete disregard for the unusual shape of the cavity. The installation will result in a classic poor batt installation--lack of complete contact with all six sides of the cavity. What kind of attention are they putting into other irregular cavities?
I brought up this issue with the same Bonded Logic spokesperson in two successive emails, and did not receive a response. That was a couple months ago. The video is still up, so I'm taking Bonded Logic to task again.
To be clear, I like cotton insulation for several reasons, including Bonded Logic's recent move to post-consumer recycled jeans (previously it was pre-consumer denim), and the fact that it's much less unpleasant than fiberglass to work with--although unlike the folks in their videos I would still wear a mask to protect from dust that comes off the product, particularly during cutting. Also, the real culprit in batt insulation is fiberglass, which has been poorly installed by so many people in so many buildings for so many years--to the extent that one observer called for it to be banned. All the more reason, though, that we need to do better in the green products community.
What do you think? Please leave your comments below.
I Have been in construction for many years and am now finishing my degree in mechanical engineering. I am truly amazed at reviews of many things...
Here's a quick explanation of what a hygrothermal assessment can tell you about a moisture situation.
John, I'm sorry to hear about your troubles. Based on my conversation with Peter Yost, our resident building scientist, it sounds like you've...
Paula Melton says, "John, I'm sorry to hear about your troubles. Based on my conversation with Peter Yost, our resident building scientist, it sounds like you've done a..." More...
Archives by Category
AIA Convention (19) [RSS]
Authors (7) [RSS]
Awards (7) [RSS]
Behind the Scenes (44) [RSS]
Books & Media (69) [RSS]
BuildingEnergy Conference (3) [RSS]
BuildingGreen Talks LEED (53) [RSS]
BuildingGreen's Top Stories (117) [RSS]
Bulletin (7) [RSS]
Case Studies (27) [RSS]
Colleges and Universities (2) [RSS]
Energy Solutions (304) [RSS]
Events (93) [RSS]
Google Earth/Sketchup (5) [RSS]
Greenbuild '07 (27) [RSS]
Greenbuild '08 (29) [RSS]
Greenbuild '09 (14) [RSS]
Greenbuild '10 (6) [RSS]
Greenbuild '11 (6) [RSS]
GreenSpec Insights (212) [RSS]
LEED (51) [RSS]
Living Future (6) [RSS]
Miscellania (41) [RSS]
Nature & Nurture (70) [RSS]
Op-Ed (68) [RSS]
Passive Survivability (7) [RSS]
Politics (32) [RSS]
Product Talk (102) [RSS]
Q&A (9) [RSS]
Resilient Design (11) [RSS]
Riversong's Radical Reflections (12) [RSS]
Science & Tech (30) [RSS]
Sticky Business (12) [RSS]
The Industry (97) [RSS]
Water Wise Guys (12) [RSS]