Cellulose vs fiberglass

Hello, I have read about windwashing causing loose fill fiberglass insulation to be derated in true R value whereas cellulose is not. Does anyone have a link to test data… Hello, I have read about windwashing causing loose fill fiberglass insulation to be derated in true R value whereas cellulose is not. Does anyone have a link to test data…Read MoreGreenBuildingAdvisor