The Ross® 65 Slant Back Vent® Installation Instructions

65 square inches of Net Free Venting Area (NFVA)

U.S. Pat. No. 8,181,403 & U.S. Pat. No. D629,093

Applicable for Roof Vents

Installation of the Ross® 65 Slant Back Vent should comply with all local standards and regulations.

Before beginning a job, determine how much ventilation is required.

New Construction or Re-Roofing

  1. Locate the roof vents on the rear or side of the house evenly spaced on the width of the roof.
  2. Mark the location of all roof vents before cutting holes. Holes should be cut 11″ High x 10″ Wide.
  3. Center the holes between the rafters within two feet (24″) from the peak of the roof.
  4. The Ross® 65 Slant Back Vent box has a template for error proof installation. Using the template mark the outline for the hole on the roof. The hole in the roof cannot be larger than the hole in the bottom of the vent.
  5. Secure the base with a minimum of 8 galvanized nails. Nails should be a minimum of 1 1⁄4″ long and should penetrate the vent, shingle, and decking. Use a nail in each corner of the flashing and along the middle of each side of the vent.
  6. Shingle up until the first full course of shingles covers the bottom of the hole.
  7. Cut the excess shingles away and install the roof vents using the 8 predrilled nail holes.
  8. The top of the Ross® 65 Slant Back Vent has a slanted peak. Ensure that the vents are installed with the peak at the UP position.
  9. To seal the vent use a plastic friendly roofing sealant. All nails must also receive a dab of sealant.
  10. Ross® 65 Slant Back Vents may be used as a low level air intake vent. The Ross® 65 Slant Back Vent must be the filtered option for this application.

Adding Ventilation to Finished Roofs

  1. Determine how much additional ventilation is required and the best location for the holes. Holes should be cut 11″ High x 10″ Wide.
  2. Inspect the attic to determine the location of the rafters and any other obstructions.
  3. Mark the holes in the appropriate locations on the top of the shingles.
  4. Using a sharp knife and cut away the shingles.
  5. Drill a pilot hole and cut through the sheathing using a keyhole saw or electric reciprocating saw.
  6. Inspect the hole for size and location and compensate if necessary. If the hole must be modified, ensure that any change will not enlarge the hole beyond the maximum recommended size.
  7. Carefully remove the roofing nails within three inches of the hole.
  8. Slide the vent into place beneath the shingles ensuring that the throat of the vent is centered on the hole.
  9. Nail the vent into place using the predrilled holes. All nails must receive a dab of sealant.
  10. Replace nails in the shingles as necessary to ensure a proper seal.

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