Icynene & moisture
OK some of you may remember my previous question/story about Icynene, we now have more data and more questions;-)
Here’s the beef:
I am removing Icynene OC foam from under the roof because it still stinks but here’s something that’s very odd.
It’s a 1920s house with wood planks all over, a new metal roof installed right over 3 layers of self adhering premium underlayment.
Icynene was sprayed 6 in underneath deck to fill the rafter space about 1.5 years ago.
Now, here’s what I measured.
The Icynene was left open and exposed to the interior for about 9 months now. I removed the spray foam using a mini-stripper (which appeared to be the best way so far..) from the top all the way down.
The moisture meter shows the wood deck moisture is over 25%!
Now, farther down closer to the floor I have a section where the foam was covered using XPS until just before I took the foam out. The moisture there after exposing the roof deck is approx. 10%.
Rafters and ridge are all “dry”, about 5-7%
The day I did this the weather was warm 60s F and very dry around 20% RH.
*Why did the deck not dry towards the interior ‘as advertised’? I would have expected the covered section to be ‘wetter’…..
*Is 25% moisture in hardwood an issue? mold risk?
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