DIY Roof Rafter Vent Chutes


Creating proper attic ventilation can help with heating and cooling and prolong the life of your roof. Maintaining a proper flow from eaves vents through the ridge or gable vents is essential. Rafter vent baffles prevent insulation and other debris from building up over eaves vent grilles. You can create your own version from 1/4-inch luan plywood. Do this project on a cool day since attics get extremely hot.

Cutting the Vent Chutes

  • Measure the distance between roof rafters in your attic. The dimension you need is the outside to outside width of your rafters, typically 17.5 inches. Mark out and cut pieces from full sheets of 4-by-8-foot, 1/4-inch-thick luan plywood. Cut your pieces across the 4-foot width of the sheet and as wide as the distance between the outsides of the rafters. Cut one piece for each vent grille. Mark out the pieces with chalk. Make your cuts with a fine-tooth plywood blade on a circular saw.

Installing the Vent Chutes

  • Cut two pieces of 3/4-inch plywood 24 inches square to use as seat boards for crawling out on the rafters in the attic. Wear long sleeves and pants, goggles, gloves and a dust mask.

    Crawl out to the ends of the rafters and uncover each eaves vent grille in turn. Pull any insulation and debris from the area of the grille. Position and screw one piece of luan against the rafters so it touches the eaves above each vent grille. Use at least one 1.25-inch treated deck screw every 6 to 8 inches along each 4-foot edge of the plywood. This will create a vent channel that extends from the eaves grille up above the insulation, securing an airway.

Finishing the Job

  • Roll any insulation back against the base of the plywood. The plywood will prevent the insulation from covering the vent grille. Staple a piece of window screen over the top opening between the roof and the plywood in attics with blown-in insulation to prevent your homemade rafter vent chute from filling with loose insulation, blocking the eaves vent.

Related Searches


  • Photo Credit air vent image by Vladimir Titov from
Promoted By Zergnet


You May Also Like

  • Roof Venting Without Eaves

    Roof venting is important for a number of reasons. Roof vents dry out excess moisture that causes mildew in your roof framing...

  • How to Vent a Cathedral Roof

    Ventilating the rafter spaces in a home attic is mandatory by most city building codes. Unventilated cathedral roofs can get too hot...

  • How to Repair Eaves & Roofs

    Although there is a great deal of hullabaloo concerning roof tiles and replacing them, little is said of the importance of repairing...

  • How to Install Rafter Insulation

    A properly insulated home has insulation above the top floor's ceiling and a ventilation chute between the insulation and the roof deck....

  • Trash Chute Requirements

    The National Fire Protection Association governs trash chute construction and maintenance. Code NFPA 82, called the "Standard on Incinerators and Waste and...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!