Baffle
Definition and meaning of Baffle in real estate.
A baffle is a device or barrier used inside a home's building envelope, heating systems, or attic ventilation to deflect, slow, or control the flow of air, heat, or combustion byproducts.
In more detail
In residential construction, the most common type is an attic insulation baffle, which is installed between rafters where the roof meets the wall. It ensures that attic insulation does not block the soffit vents, maintaining a clear path for air to flow from the outside into the attic space.
This ventilation helps prevent ice dams in the winter and heat buildup in the summer. Baffles are also found in fireplaces, wood stoves, and septic tanks to direct flow and improve efficiency.
Key facts
| Category | Property Types & Construction |
|---|---|
| Common locations | Attics, fireplaces, septic tanks |
| Primary function | Directing airflow or fluid movement |
| Building code role | Ensures required attic ventilation is maintained |
A builder installs foam baffles along the attic rafters before blowing in loose-fill insulation, keeping the roof vents clear to ensure proper airflow.
Frequently asked questions
What happens if attic insulation blocks the vents?
If insulation blocks the vents, the attic will lack airflow, which can lead to moisture buildup, mold on the roof structure, and ice damming.
Are baffles expensive to install?
Attic baffles are inexpensive and simple to install during the insulation process, costing very little per piece but saving thousands in potential roof damage.