30 Oct '12, 5am

Green Building Q&A: Can cellulose be too fluffy?

During one of my frequent visits to this area of the site, one of the discussions revolved around, to quote Martin "the slight performance degradation of very fluffy insulation on the attic floor due to wind-washing and internal convection currents, especially in very fluffy fiberglass insulation at very cold temperatures". My question comes from my recent experience of removing my cellulose insulation and blowing it back in after spraying ccSPF on the attic floor. The re-used cellulose insulation seemed much fluffier than the supplemental cellulose I installed. Can the cellulose be too fluffy and result in the internal convection currents like occurs in loose fill fiberglass?

Full article: http://www.greenbuildingadvisor.com/community/forum/energ...

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