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Fiberglass vs. Cellulose Insulation

| Posted in General Discussion on

I would like to insulate my new addition with blown-in cellulose insulation but am concerned if this would create a problem where the roof meets the old house in a valley.  The old roof has fiberglass batt insulation.  Would this possibly cause any strange problems for snow sliding or ice dams on the metal roof?  I need to decide weather to vent the new roof or not.

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