Why it is so important to ventilate?

Proper attic ventilation systems allow a continuous flow of outside air through the attic, protecting the efficiency of the insulation and helping to lower temperatures in the living space.

Poor attic ventilation can cause:

  • Premature aging of your roofing system (“fried” shingles)
  • Warping, cracking, or breaking down of wood framing
  • Damage to siding, exterior or interior paint, and wallpaper
  • Higher energy costs

A properly ventilated attic can help reduce the load on your air conditioner by moving the superheated air out of your attic before it builds up and causes damage.

Cobra Exhaust Vents

Cobra® Snow Country

Cobra Snow Country Exhaust Vent For Roof Ridge
Exhaust Vent For Roof Ridge
  • Vents The Attic Allows heat & condensation to escape at the most effective location — the ridge
  • Effective Provides 18 sq. inches per linear foot of net free ventilating area
  • Snow Guard™ Filter Helps prevent snow infiltration in harsh winter weather
  • Easy Sizing EasyTear™ feature allows you to hand-tear product in 3" increments — no knives necessary and less waste!
  • Fewer Call-Backs External baffles help deflect wind and rain
  • Fits Better Extra-flexible hinge design allows installation on 3:12 to 16:12 sloped roofs
  • Peace Of Mind Up to a Lifetime ltd. warranty when installed on Lifetime Shingle roofs

Exhaust Vent For Roof Ridge

Cobra Exhaust Vent For Roof Ridge

The original Cobra® ridge vent, protecting over 2 million homes, comes on a mesh roll for fast and easy installation with no complicated fitting, wrapping, nail gun adapters, connectors, or end-plugs needed. It features a shingle-over design to help blend into the ridge line.

  • Vents The Attic... Allows heat & condensation to escape at the most effective location — the ridge
  • Great Performance... Provides 16.9 sq. in./lineal foot (hand nail) or 14.1 sq. in./lineal foot (nail gun) of net free ventilating area
  • Nails Included... Includes Smart Nails™ for reliable hand installation or 13 /4” coil nails for nail gun installation
  • Easy To Install... Quick 3-step process on roof slopes between 2:12 and 20:12
  • Ridge Cap Compatible... Options available for 10”, 12”, and 11.75" (metric) width ridge cap shingles
  • Peace Of Mind... Up to a Lifetime ltd. warranty when installed on Lifetime Shingle roofs*

Cobra® Fascia Vent

Cobra Fascia Vent

Effective attic ventilation is critical for a long-lasting roof! A properly balanced attic ventilation system will help to:

  • Remove excess heat and moisture to help protect your roof from premature deterioration 
  • Prevent roof rot in your attic or roof deck 
  • Minimize peeling and extend the life of exterior and interior paint
  • Limit the growth of harmful mold 
  • Safeguard your attic possessions against mildew damage 
  • Guard against ice damming in harsh winter climates 
  • Promotes energy efficiency by reducing excessive heat in your attic

Cobra Ventilation Products

Master Flow Ventilation Products

Master Flow® 10‘ Aluminum Ridge Vent

Master Flow® 10‘ Aluminum Ridge Vent

For Roof Ridge – AR10

Durable aluminum construction with built-in baffle ventilates the attic while helping to prevent moisture infiltration.

  • Quality-Built... For long life on the roof
  • Excellent Performance... Wide, free-flow drainage areas
  • Easy Installation... Aluminum sections with pre-punched nail holes install quickly with strap and end/connector plug accessories
  • Watertight... Built-in weather baffle helps prevent moisture infiltration for slopes from 3:12 to 12:12
  • Good Ventilator... Provides 21.5 sq. in. per lineal foot of net free ventilating area

Master Flow Gable Louvers

  • Designed for flush or recessed installation!
  • Available in thermoformed plastic (SL Series) or aluminum (DA Series)

Power Attic Vents – Roof Mount

All Master Flow® Roof-Mounted Power Attic Vents are factory-tested before shipment and include a heavy-duty insect/animal screen for maximum performance and protection.

  • Energy Efficient… PSC (permanent split capacitor) motor SGM 20 provides maximum operating efficiency
  • Available In Popular Colors… To blend in with the finished roof (see color chart on page 11)
  • Adjustable Thermostat... Included on all models for superior operation
  • Adjustable Humidistat/Thermostat Available… On PR2DHT and PR3DHT models only
  • Extra-Long Conduit Available… For easier electrical hook-up (PR3 model only)

Power Attic Vents – Gable Mount

Master Flow. Gable-Mounted Power Attic Vents are the easiest power ventilators to install and won’t detract from the look of the finished roof. They’re factory-tested prior to shipment and are manufactured with 100% rust-resistant metal construction.

  • Energy Efficient… PSC (permanent split capacitor) motor provides maximum operating efficiency
  • Adjustable Thermostat Included On All Models… For superior operation
  • Extra-Long Conduit… For easier electrical hook-up (on PG3 model only)

Roof Louvers (Exhaust)

SSB960A/SSB960G Metal Roof Louver


Our Best Metal Roof Louver, with fully enclosed hood to help prevent rodent/insect infiltration and leaf/pine needle clogging

IR65 High-Impact Resin Roof Louver


Our Best High-Impact Resin Roof Louver with superior resistance against dents and scratches

Soffit/Undereave Vents (Intake)

LSV8 Series

LSV8 Continuous Soffit Vents
Continuous Soffit Vents
  • Ventilates... Provides critical intake ventilation
  • Ideal... Perfect for new construction or remodeling
  • Easy To Install... Eight-foot sections
  • Durable... Aluminum louvered construction

EAP Series

EAP High-Impact Resin Soffit Vents
High-Impact Resin Soffit Vents
  • Versatile... All-purpose intake ventilation
  • Durable... High-impact resin construction
  • Easy To Install... Oval snap-in design for easy installation with 5 /16" soffit material
  • Resistant... Contains UV inhibitors for long-lasting durability

EAC Series

EAC Soffit Vents
Our Most Popular Soffit Vents
  • Versatile... All-purpose intake ventilation
  • Easy Installation... Pre-punched nail holes
  • Excellent Design... Surface-mount design makes installation a snap
  • Corrosion Resistant... Screened aluminum construction
MasterFlow Ventilation Products