Where is the dust in our house (pink/grey fiber-like particles) coming from, and what is the most allergy friendly insulation for attic?

Question

Where is the dust in our house (pink/grey fiber-like particles) coming from, and what is the most allergy friendly insulation for attic?

Asked by Lee

We have severe respiratory issues, allergies and asthma. We built a new house 4 years ago, but for some years are noticing an increasing amount of pink/grey dust daily. It is v bad on windy days. We have to mop the whole house (wood floors) daily to get some relief. Immediately, it gets dusty again. The house has aluminum flexible duct work and PVC pipes. We recently got someone to look at the insulation. They said the attic was not sealed properly, and the fiberglass batts were acting as filters for dust from the streets due to air pressure changes, owen corning loose fill insulation is flying in the attic causing insulation to circulate in the rooms.They said attic must be vacuumed out, remove fiberglass fill, properly reseal, then one-step cellulose sprayed in or denim. They said no Air Krete in attic. Job will be extremely dusty. What kind of insulation is best with our health issues? Any other reasons for this pink/grey tiny fiber-like particles circulating indoors? Pls help

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Sean Lintow Sr's picture

While I have to say air-sealing is a necessity it is probably not the cause of this especially as the air flow typically for you is not coming in from the attic but heading out through the attic (stack effect) - this is being caused probably by a disconnected duct or a very badly sealed system As for air quality issues - yes air-sealing as I said is needed, removing all the insulation (especially only 4 years old) probably not unless mice / vermin made their way into it or you decide to go with another product. What is the best - almost any type will work fine if it is installed properly. I could easily argue for & against almost every type out there. In all seriousness you need to get a very experienced energy auditor out there that knows their building science & isn't set on just one type of product For more: http://thehtrc.com/2012/building-science-stack-effect