Helpful? 0

Possible allergic reaction after fiberglass replacement?

I just wanted to ask a quick question to see if anyone thinks or has had experience with a client getting respiratory problems after fiberglass batt removal and replacement? We had a rodent infestation in our crawlspace and had the old infested fiberglass removed (after trapping and killing all rodents) and new fiberglass batts installed. The new batts are the formaldehyde free Eco Batts by Knauf. They were installed on the ceiling of the crawlspace, under the floor of our living space. The installers were never in the living space of the home. The crawl space access is outside, however we do have lots of air leakage through the floorboards as identified on an energy audit. The occupants were not home during the removal/install process.

Since the fiberglass was replaced, 2 of the occupants have had respiratory symptoms (runny nose, cough, throat irritation and soreness with the main symptoms being a 'tickle" in the back of the throat which causes a cough reaction), the other occupant just reports the "throat tickle". It's been over a week since the work was done. I am concerned this is a reaction to either chemicals in the fiberglass that I was unaware of beforehand when researching the product (I thought the Eco Batt was a good "green" option), or fiberglass fibers that made their way into the home. However I am aware it could be just coincidence and could be caused by other issues such as perhaps a virus or allergy to an unrelated substance.

The main reason I am asking this is (see my other thread) we need to address the air leakage from the crawlspace through the floor anyway, and are deciding what to do about that. (Replace current insulation with spray foam or caulk gaps and re-hang the fiberglass or possibly replace it with cotton batts) Having information linking either the new insulation to the symptoms we are having or not will help us ultimately figure out how to proceed.

Asked by morgan martin
Posted Sun, 05/15/2011 - 12:25


6 Answers

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1. First of all, it's a bummer that you installed fiberglass batts in a crawl space. That's a bad choice. For photos of what fiberglass batts look like after a few years in a crawl space, see Building an Unvented Crawl Space.

2. Secondly, I will once again point out that when it comes to allergies or other medical problems, the patients should seek advice from their doctors, not from builders or architects. Good luck.

Answered by Martin Holladay, GBA Advisor
Posted Mon, 05/16/2011 - 10:09
Edited Mon, 05/16/2011 - 10:17.

Helpful? 0

Hi Martin,
I did ask my Dr. first...She thought it could be a formaldehyde reaction. However when I told her it was a formaldehyde free product (which I picked purposely due to my chemical sensitivity) she just didn't know. She wondered if maybe some fibers got into the house during install and we breathed them. When I told her the access to the crawl was outside, she wasn't sure if they could migrate through the floorboards. She was the one who told me to ask a builder!

The reason we have the fiberglass in there currently was due to the rodent infestation and damage, we had to get the crawl professionally cleaned out by a crawl space cleaning company. They usually replace the insulation with the same thing that was there (ie: fiberglass in our case). At the time I was focused on getting a product that would not make me sick due to the chemical sensitivity I have, so I thought I was doing the right thing to choose the Eco Batt product.

However, later, after getting my house the energy audit, I realized that fiberglass does not do anything for air transfer from the crawl to living space. So that was why I posted my questions on the other post. I am now working with a green builder to find a solution to fix the air transfer problem, as well as not trigger my chemical sensitivity,

In the meantime until we come up with a better solution, we are stuck in our current situation with the new fiberglass under there and I was just wondering if anyone on here has an idea why it might be irritating to us.

Answered by morgan martin
Posted Mon, 05/16/2011 - 13:07

Helpful? 0

For what it's worth, I frequently get those exact symptoms after inspecting homes with almost any type of insulation. I therefore attribute it to dust and my own foolishness for not wearing a mask all the time.


Answered by Jeremy Marin
Posted Mon, 05/16/2011 - 20:29

Helpful? 0

There are a lot of nasty germs in mouse dropping that become air borne when distrubed. That along with other things like mold, pollen etc. Hopefully things get better quickly but if not see the doctor again.

Answered by Robert Hronek
Posted Mon, 05/16/2011 - 21:05

Helpful? 0

I've been thinking a lot about your replies and I wonder if it is an allergic reaction to the old fiberglass and whatever it contained. I think it was probably from the original owners who built the home...So that would make it 18 years old. Yuck. It doesn't seem to be getting worse so I am reassured it's not some crazy rat borne illness. But I guess from what you all wrote it's either from fibers, mold, dust, or pollen? I hope it goes away soon. It's been about 1 and a half weeks.

Answered by morgan martin
Posted Tue, 05/17/2011 - 22:03

Helpful? 0

Hi Morgan - What did was the end-result on this issue? Did the symptoms go away and did you keep the Eco-batt? What was the solution?

Answered by K. L
Posted Fri, 06/29/2012 - 02:13

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