1. What is a baffle?
Answer: A 4′ piece of polystyrene or cardboard shaped similar to the letter ‘W’ and 16″ wide to fit between the rafter boards.
2. When is a baffled used?
Answer: When the airflow from the edge of the roof is blocked. Without proper air-flow moisture and heat build up in the attic and may cause dangerous mold and mildew issues.
3. Where are baffles placed?
Answer: At the lower edge of the attic space separating the insulation from the soffitts to keep insulation from blocking airflow.
Vent baffles are also called vent chutes or rafter vents.
Proper air flow and ventilation extends the life of a roof and helps alleviate mold and mildew. Proper attic ventilation reduces heat buildup in the summer. By holding back the insulation, baffles allow air to freely flow in the attic space and travel upward and out through exhaust vents.
Proper ventilation and air flow is one of five steps required when a permit has been issued. There are five steps to installing a roof required by all manufacturer’s of roofing products if you want your roof warrantied.