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Proper Attic Ventilation for Maryland Attics

Optimized Process

Attic Ventilation

Proper ventilation has intake (vented soffit) and exhaust (ridge vent).  When an attic is properly insulated, baffles are required at the eaves in the attic in order to maintain the air passageway so that the attic is adequately vented.  Otherwise, an improperly vented attic can lead to moisture/mold issues and degradation of roofing system components as well as insulation R-Values.

Homeowners that have a minimum insulation level in the attic equal to R-19, reflective roof shingles and proper ventilation can experience up to two-thirds less solar heat gain than those with characteristics such as little to no insulation, dark roofing shingles and no attic ventilation. 

Ventilation Information 
Exterior Connections to Attic 
Flexible Utilization
  • Intake down low (soffit)
  • Exhaust high up (ridgevent)
  • Proper baffle install 
  • Optimal attic ventilation
Optimized Process

Baffles

Baffles maintain an air passageway up and over the insulation so that it can exhaust up top at the ridge vent. 

The baffle also serves the purpose of preventing wind washing of the insulation which makes it less effective.

Baffles are only required if the soffit has intake holes/air passageways that lead into the attic and the area above the living space. 

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*Evaluate windows & doors
*Evaluate attic ventilation

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    Hometrust Remodeling is a licensed contractor specializing in a whole-house approach to home remodeling with an emphasis on educating our customers, providing energy efficient solutions, maintaining a network of high caliber technicians and using building science principles.

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    Hometrust Remodeling
    North Laurel, MD 20723
    301.957.6532
    info@hometrustremodeling.com
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    An Energy Auditor's Purpose 
    "Energy auditors visit residential buildings and talk to owners and residents.  They inspect, test, and measure to decide what energy-efficient retrofits are practical and cost effective." Residential Energy