Odor from Roxul Comfortbatt?
I'm replacing the insulation in my partial height basement stud walls (concrete to 42", 2x6 to 92.5). I hate fiberglass and the old batts were poorly installed. More details if you care but suffice it to say this is the time to replace the wall insulation.
Fast forward to finding Roxul ComfortBatt finally easily available on their website for special order (pro desk at Home Depot can get it as well). Ordered a decent quantity of it.
Received my first part of the shipment, opened a bag, and installed 4 of the 5 batts. Great. Not scratchy, doesn't immediately cast off fibers, cuts easily, does conform to the bays a little better (it isn't magic however), fast to install. Labor savings alone if batts need cutting would pay for the difference between the mw batt and the fb batt. It does seem like it doesn't flatten against the mid bay blocking as well and it seems like it doesn't want to be handled a lot. It also needs to be picked up in a non-plank fashion or it might 'crack' or tear.
Install 5th roxul batt. Whoa. I can smell a distinct catty odor. Ask my helper to smell it. Helper describes it as 'doggy'. To me, it seems to be coming from the batt. I could only detect it within a few feet, such as by holding the batt or sniffing it directly. The 5th batt was from the bottom of the pile sitting on the basement concrete slab (which was damp due to other construction activities). Perhaps that's why it kicked off an odor and the others didn't?
Now I'm concerned. I got this stuff because it was GreenGuard rated and the formaldehyde binder is supposed to be cooked off during production. I'm not sure what I smelled but I doubt I want to breathe it. I see elsewhere on this site that people suggest a catty odor being from ammonium sulfate potentially.
After awhile, we returned to the offending batt and sniffed it again. No remaining odor.
I'm thinking I'll return to the batt tomorrow and mist it to see if it kicks off new odor.
For the community, any sense of:
- What the odor is?
- Whether it is safe?
- Whether this odor is typical of Roxul ComfortBatt
- Whether Knauf experiences this problems (and if it doesn't, where I could get it).
- Will the odor/compound blow off in a reasonable (a few days) period of time? Would misting or ventilation help speed up that process?
Posted Mon, 12/16/2013 - 04:20
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