The ideal choice for intake ventilation when under eave intake is not allowed by county and state regulations or when soffits do not exist. The eave application is the first pioneered and most popular application of SmartVent.
Our patented design has revolutionized the roofing industry with regards to attic ventilation.
SmartVent must be installed on roof decks with a pitch of 4/12 or greater.
(Ensure metal drip edge was previously installed.)
Begin by cutting a slit 1” wide (or a series of 1 ¾” holes at 3” on center) into the roof decking 6” to 7” up from the drip edge. Do not cut slit within 12” of any side end or valley/wall intersection. Be careful not to cut through the rafters!
NOTE: Ensure insulation is not blocking the flow of air extending from the soffit to the roof ridge. Ridge vents or other exhaust vents are required
Place the fabric piece half way on the roof rake side edge(Gable) and even along the bottom of the drip edge. Half of the fabric piece is hanging over the rake side(Gable) edge of the roof.)
Nail the fabric piece(s) in place with two(2) roofing nails, one high and one low.
*SmartVent Tapered End Caps are available for terminating an installation prior to an obstruction. Tapered End Caps are sold separately and available through your local distributor.. If unavailable, please click here to view instructions on creating a SmartVent tapered end cap.
Lay the 3’ (three foot) piece of SmartVent even with the drip edge and at the roof rake drip edges(Gable). Nail the SmartVent to the roof decking at the top edge with four (4) nails spaced evenly from one end to the other starting 2” in from each end of the SmartVent piece. Nail the bottom of the SmartVent with four (4) nails spaced evenly along the “nail line” and matching the nails at the top of the SmartVent. Each section of SmartVent requires a total of eight (8) nails. Nails should be a minimum of 1 ½”, enough to penetrate through the roof decking. Wrap the End Fabric tightly so it covers the outer edge of the SmartVent and nail in place using two nails, one high & one low.
Continue installing SmartVent until the last piece. Repeat STEPS 2 & 3 before laying the final SmartVent piece. The roof rake side edge (Gable) SmartVent with wrapped fabric allows for additional air flow. Do not make any modifications to this detail without written permission from DCI Products.
STEP 6 Shingles must overhang the SmartVent lifted edge ½” minimum to 1” maximum.
Shingle the roof as usual. Beginning with a starter course, always overhang shingles at least by ½”. You now have proper intake ventilation to the attic.
NOTE: Secure starter course shingles to the roof deck at the ¾” lifted edge of the SmartVent with nails that penetrate through the roof sheathing, (Generally 1½” roofing nails are used on new roofs.) Refer to shingle manufacturer application manual. Please call the DCI Technical department with any questions.
SmartVent can be installed under virtually any shingle course
using proper installation techniques. SmartVent should be installed on shingled roofs with a minimum of 4/12 pitch. There is no maximum slope limitation. Low slope roofs with less than 4/12 pitch can use FasciaVent by DCI for intake ventilation. Use of continuous ridge vents or other approved exhaust vents are required. No Moisture from household appliances, equipment orfixtures can be discharged into the attic area. Maximum rafter length is 22feet to maintain proper NFA(soffit to ridge). Longer rafters may require a mid roof installation of SmartVent.
Most houses with ridge vents do not have the proper soffit ventilation required because attic insulation blocks the
soffit vents. SmartVent allows cooler air to enter under the shingle, through the 1" roof slit and out the ridge
vent providing superior air flow and attic cooling.