Lomanco 750B 8 Inch Black Aluminum Slant Back Roof Louver

Product Description

The LOMANCO 750B is an 8-inch black aluminum slant-back roof louver designed for passive attic ventilation in residential roofing applications. Constructed from aluminum with a black finish, this static vent helps exhaust heat and moisture from attic spaces without mechanical components. The unit measures 16 inches wide by 20-5/16 inches long by 5 inches tall overall, with an 8-inch opening size. A weather-tight seamed collar limits water infiltration at the roof deck penetration. Roofers and general contractors install this louver during new construction or re-roofing projects as part of a balanced attic ventilation system.

The 750B is suited for residential sloped roofs where static exhaust ventilation is required. Its slant-back profile is appropriate for standard asphalt shingle installations. The three-sided louver design promotes greater airflow compared to single-opening configurations. The large nailing flange simplifies attachment to the roof deck and aids in creating a weather-resistant seal under the shingle course. This louver is typically installed near the ridge line to maximize the stack effect and improve overall attic air exchange.

Key Features

• 8-inch opening size for passive attic exhaust ventilation
• Three-sided louver design for increased airflow capacity
• Slant-back profile integrates with standard sloped roof installations
• Weather-tight seamed collar reduces water intrusion at the roof penetration
• Large nailing flange simplifies deck attachment and shingle integration
• Black aluminum construction resists corrosion and helps prevent roof discoloration

Compatibility

Designed as an OEM-style static exhaust louver for residential sloped roof attic ventilation systems.

Installation Notes

Installation is typically performed by a licensed roofer or general contractor following local building codes and manufacturer guidelines. Cut the roof deck opening to the specified size before setting the louver, and ensure the nailing flange is fully seated and sealed beneath the surrounding shingle course. Do not install over existing insulation baffles in a way that blocks the intake ventilation path. Always verify that the overall ventilation system meets the 1-to-150 or 1-to-300 net free area ratios required by the IRC.

Technical Specifications

• Opening Size: 8 inches
• Overall Dimensions: 16 inches x 20-5/16 inches x 5 inches
• Material: Aluminum
• Finish: Black
• Profile: Slant Back
• Collar Type: Weather-Tight Seamed
• Weight: 11 pounds
• Unit of Measure: EA
• Package Quantity: 6

Standard Information

• Brand: LOMANCO
• Manufacturer Part Number: 750B