RIDG-VENT®

Ridg‑Vent® is one of MWI’s original product lines—and it remains a trusted solution for ridge ventilation today. Designed to exhaust hot air and moisture naturally at the highest point of the roof, Ridg‑Vent® helps protect building structures, extend roof life, and maintain balanced airflow in residential, agricultural, and commercial applications.

From garages and mini‑storage units to livestock buildings and full commercial structures, Ridg‑Vent® delivers consistent natural ventilation through proven design. It’s a simple, reliable solution—refined through decades of use—that reflects MWI’s long‑standing commitment to quality metal ventilation products.

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RV100

Economy Ridg-Vent

10' long low profile ventilator

5/8" Ventilation Space Each Side
Exposed Edge Hemmed on Nailing Flange
Totally Covered Top
Weep Holes for Drainage
5-12" Overall Coverage
Easily installed on residential or commercial roofing jobs, ideal for attic ventilation on garages, mini storage, etc
3 1⁄2" unrestricted throat with 15 sq. inches of free area per lineal foot with totally covered top
Designed to exhaust air out of attic space or an entire building, recommended to be used in a “clean” environment
Use in conjunction with an equal area of vented soffit material or louvers for maximum air flow (15 sq in per lineal foot, 1.04 sq ft per vent)
Shipped 2 per carton with flashing for individual or continuous runs, with splice plate included

RV25

Ridg-Vent

10' long low profile ventilator

1/2" Galvanized Mesh
All Exposed Edges Hemmed
Rain Diverter (Metal)
Continuous Drainage Space
3 3/4" Nailing Flange
Rises only 3” above the ridge, all metal edges are hemmed for strength and easier handling
2 1⁄2" unrestricted throat with 30 sq. inches of free area per lineal foot
Designed to exhaust air out of attic space or an entire building
Use in conjunction with an equal area of vented soffit material or louvers for maximum air flow (30 sq in per lineal foot, 2.1 sq ft per vent)
Individually packaged with flashing included, same flashing used for individual or continuous runs

RV35

Ridg-Vent

10' long low profile ventilator

1/2" Galvanized Mesh
All Exposed Edges Hemmed
Rain Diverter (Metal)
Continuous Drainage Space
2" Nailing Flange
Ideal for large attic or entire building ventilation such as horse, cattle or poultry buildings
3 1⁄2" unrestricted throat with 36 sq. inches of free area per lineal foot
13 1⁄4" overall coverage, with wider flanges available
Rises only 4 1⁄2"above the ridge, all metal edges are hemmed for strength and easier handling
Use in conjunction with an equal area of vented soffit material or louvers for maximum air flow (36 sq in per lineal foot, 2.5 sq ft per vent)
Individually packaged with flashing included, same flashing used for individual or continuous runs

RV35F

Ridg-Vent

10' long low profile ventilator with clear fiberglass rain diverter

1/2" Galvanized Mesh
All Exposed Edges Hemmed
Clear Fiberglass Rain Diverter
Built-in skylight lets natural light into attic or building
Let the sunshine in, keep the heat & moisture out!
Continuous Drainage Space
2" Nailing Flange
Ideal for large attic or entire building ventilation such as horse, cattle or poultry buildings
Clear fiberglass diverter lets sunshine in and keeps the elements out; fasteners through the fiberglass are slotted to allow expansion and contraction
3 1⁄2" unrestricted throat with 36 sq. inches of free area per lineal foot
13 1⁄4" overall coverage, with wider flanges available
Rises only 4 1⁄2"above the ridge, all metal edges are hemmed for strength and easier handling
Use in conjunction with an equal area of vented soffit material or louvers for maximum air flow (36 sq in per lineal foot, 2.5 sq ft per vent)
Individually packaged with flashing included, same flashing used for individual or continuous runs

RV400

RV400 & RV900

4' & 10' long high profile ventilator

1/2" Bird Screen
Outerband
Top Brace
Diverter
Lower Brace (900 only)
Lower Band
Damper (optional
10' cable included with damper)
Weather Seal

Click here for RV400 & RV900 sizes chart

Damper Rods: 5/16" plated steel

RV400 Weight: 30 lbs w/o Damper, 33 lbs w/ Damper

RV900 Weight: 78 lbs w/o Damper, 85 lbs w/ Damper

RV900