Insulation Baffles Vaulted Ceiling
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. During the winter months, a home is more susceptible to the formation of condensation where the attic insulation contacts the roof. The home’s slope or pitch of the roof is also a factor in the possibility of condensation along with the climate. Installing baffles in every cavity will help prevent the potential condensation on roof decks.
Baffles are made from hardcore waterproof foam. They are available in 4 foot lengths and 22-1/2 inch widths. These baffles can be placed between rafters and are usually white, blue or pink. Although they aren't required for every rafter in the attic, they can help ensure that proper insulation is being installed. Rafter baffles can also be called venting chutes and wind baffles. These are often used in roof ventilation systems. Baffles can be installed at the eaves to keep warm and cool air out and dry it in.
The number of attic baffles you need depends on your roof's size and shape and how many soffits you have. For every attic vent, the space between your rafters that covers each vent should be covered. See how many baffles need to cover each of those spaces and multiply that by how many total spaces there are. More baffles create more airflow, but you can always start with less and add more later.