Omni-Wall VentFor where a roof meets a wall.

Turbine installation

The Lomanco® Omni-Wall™ Shingle Over Vent offers functional ventilation for where your roof joins a wall. The OW-4 may also be used in a contemporary shed roof (mono-slope/single-slope) application.


The OW-4 is designed for maximum weather protection, offering internal aerodynamic curved baffles with external perpendicular omni baffles. An external water shield and four drain holes per foot are also incorporated into the design of the vent. The OW-4 offers 9 square inches of Net Free Area per linear foot and comes with a Limited Lifetime Warranty.

Easy Installation

The OW-4 is designed to fit any roof pitch from a 2/12 to a 16/12. Installation is made easy with supported nail holes, molded nail lines, alignment tabs, slot width guide lines, and molded-in end plugs.

  • Features
  • Instructions
  • Literature
  • Model Info

Lomanco® Omni-Wall™ Model OW-4

  • Internal aerodynamic curved baffles.
  • External perpendicular omni baffles.
  • Weatherproof underlapping joint.
  • Four drain holes per foot.
  • 9” Net Free Area per linear foot.
  • External venturi baffle.
  • Pre-formed to 3/12 pitch.
  • Supported nail holes.
  • Molded nail lines.
  • Alignment tabs.
  • External water shield.
  • Slot width guide lines.
  • Molded-in endplug fits all roof pitches.
  • High grade, high impact UV resistant material.
  • Designed for maximum weather protection.
  • Lifetime Limited Warranty.

Lomanco® Omni-Wall™ Vent Instructions

Model Name Description Link
OW-4 Omni-Wall Shed Roof Vent  /></a>
OW-4 Omni-Wall Single Slope Roof Install  /></a>

Lomanco® Omni-Wall™ Vent Information

Lit# Title Product Line Link
196 Lomanco Catalog All  /></a>
394 Ventilation Guide All  /></a>
291 3 Must Do Flyer All  /></a>
193 Going Green Flyer All  /></a>
292 Comic Ventilation Flyer All  /></a>
1097 Shingle Void All  /></a>
OLO Plastic Products Warranty Omni Series - P60  /></a>
451 Omni Wall Flyer Ridge Vents  /></a>

Lomanco® Omni-Wall™ Vent Specifications

Click to view Color Codes chart.

Model Color LTH. (ft.) NFA (in.2) CTN. QTY. CTN. WT. (lbs.)
OW-4 Black 4 36 10 Sections/40 ft. 22.9

View specific product certifications by choosing the certification icon below.*

*Some products shown on page may not be certified.