The foam baffles hold up in Michigan's humidity, whereas cardboard baffles can absorb moisture causing them to fall and be ineffective. In addition to offering airflow in your attic space, baffles keep attic insulation off your roof deck, which is especially important for cold Michigan winters.
Can I use cardboard for attic baffles?
Cardboard Baffles are used for ventilation to channel cold and hot air to roof vents and to keep insulation from blocking the soffit area. These baffles are made of cardboard stock that have been slotted and scored and easily installed with staples.