When Cellulose Insulation is subjected to moisture or disturbed after being blown in, how is it affected?
We hired a contractor in Canada to replace insulation in our attic when a roof patch opened up under an ice dam in 2011. They removed batt insulation and replaced it with blown in cellulose fibre insulation. When they blew in cellulose insulation they did not connect the new bathroom vent hoses they supplied or seal pot lights below the vapour barrier and this is an extreme winter weather climate. This spring, the insulation was disturbed in order to determine the source of water causing damage to the drywall in the room beneath this space. They proposed removing the cellulose insulation by pushing it to the side in order to seal off the pot lights and connect bathroom vent hoses then scoop the insulation back into place.
Can you please provide answers to the following questions and give any advice as to how you would proceed?
1. With the moisture condensation experienced would the insulation r value be degraded even if it had not been disturbed?
2. If the R value is degraded due to moisture and being disturbed, how much R value would be lost?
3 How would you take this insulation out of the attic if it needs to be replaced?
4. What is the r value of cellulose insulation that is not blown in?
5. Would the insulation be subject to increased mold once it has been subjected to this much moisture and ventilation is not optimal?
Posted May 19, 2014 8:47 AM ET
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