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02-19-2017, 06:42 PM #1
White powder on insulation in attic
Can anyone explain this white powder on the insulation?
It is very light and spread throughout the atticDSCN0518.jpgDSCN0519.jpgDSCN0511.jpg
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02-19-2017, 09:27 PM #2
Re: White powder on insulation in attic
Borax ?
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02-20-2017, 04:59 AM #3
Re: White powder on insulation in attic
Yep, quite possibly boric acid, a ton of folks use this as a pesticide.
Yet another reason to wear a good quality respirator when entering attics.
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02-20-2017, 12:53 PM #4
Re: White powder on insulation in attic
Thanks for the feedback
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02-21-2017, 07:27 PM #5
Re: White powder on insulation in attic
Borax and icing sugar is ant poison.
Check for Carpenter ant nests, piles of sawdust and debris. In the piles, check for dead ant body parts to confirm.
John Kogel, RHI, BC HI Lic #47455
www.allsafehome.ca
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02-22-2017, 09:15 AM #6
Re: White powder on insulation in attic
Another idea.
Naphthalene or it's substitute (mothballs,flakes) that had been used as a fumigant or repellent.
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02-22-2017, 02:45 PM #7
Re: White powder on insulation in attic
What part of the country you in Bob?
1: The insulation is a single batt. <4" = ><R12.
Poor R for any part of the country if the home is conditioned.
2: An even pattern of staining on the exposed batts.
3: Stains on the ceiling joists.
Suspect water intrusion at one point in time.
staining.JPG
White powder, likely borax.
Robert Young's Montreal Home Inspection Services Inc.
Call (514) 489-1887 or (514) 441-3732
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