Cor-A-Vent Purlin Vent

Is your insulation a wet blanket? Chances are it is. You know the problems all too well—cold side condensation on your metal roof and siding. You probably can’t see it, but, it could be robbing you blind. Even slight amounts of moisture in blanket insulation can seriously reduce its R-value. Don’t count on vapor barriers—every seam and penetration has to be sealed perfectly, and how often does that happen on the job? Moisture vapor penetrates just about everything, and once it’s trapped, you have problems. The heating bill goes up, insulation can sag and the roof fasteners and purlins will start to rust. What do you do? Next building, you specify Purlin Vent™, from Cor-A-Vent—“The Leader In Innovative Rooftop Ventilation” ®

Purlin Vent is the first real system solution for venting behind roofing and siding in metal buildings. Made from sheets of crush proof profile extruded PP* Purlin Vent serves as an excellent thermal break between the metal roof and the purlin when foam insulation is used. For blanket insulation, Purlin Vent with Insulation Shield does two things. One, it keeps the blanket insulation away from the underside of the roof. Two, it creates a passageway for moisture to diffuse harmlessly to the outside.  When used with any of Cor-A-Vent’s metal roof ridge vent applications, it creates a very effective system for removing moisture and keeping your insulation dry.

Performance

Purlin Vent can carry a load as well. One square foot of the 6-ply PP boards COR-A-VENT uses, equal to a 4-foot piece of Purlin Vent, passed crush tests, conducted  by an independent agency, up to 7,653 lbs.

Call COR-A-VENT at (800) 837-8368 for more information on new Purlin Vent, including the Purlin Vent Calculator, COR-A-VENT’s formula to figure out just how much ventilation your metal building will need to stay dry for years to come.

Key Benefits

• Provides cross ventilation both horizontally and vertically between the purlins.
• Provides a thermal break with an R value of 3.1.
• Net free vent area (NFVA) of 40 sq. in. per 4' section
• Made from thermally stable, crush resistant polypropylene (PP) sheets.
• Doesn't compress over time, so roofing & siding screw holes don't elongate and leak.
• Supplements ASHRAE 90.1 - 1999 Model Energy Code (MEC) requirements when vapor barriers greater than 1 perm are used.
• NAIMA, NIA and 2000IEEC call for cold side ventilation as a design consideration in controlling condensation and meeting required U values of the Model Energy Code.

Product Packaging and Shipping Information
Pcs per Unit Shipping Weight per Unit
12 - 4 foot pieces 13 lbs


For detail drawings with Purlin Vent Blocks click here.
To see the Purlin Vent Brochure click here.
 

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Cor-A-Vent will be closed July 4th and 5th so we can enjoy a long holiday weekend celebtrating our nation's independence.

 

You can email orders to us now:

orders@cor-a-vent.com 

 

Revolution used for Joplin, MO project

Cor-A-Vent recently donated Revolution Rolled Ridge Vent to the Tulsa, OK Habitat for Humanity to be used in their re-build project in Joplin, MO to help re-build that community in the wake of the devastating May 22 tornado. You can read about the Ten for Joplin project here: http://www.tenforjoplin.org/

 

(Habitat-Tulsa press release) JOPLIN, Mo. – Sept. 8, 2011 – The Tulsa and Joplin Area Habitat for Humanity teams, surrounding businesses and the City of Joplin are partnering on one of the most aggressive rebuilding efforts since last May’s devastating EF-5 tornado. The Ten for Joplin project team plans to build 10 homes during a 16-day period for low-income families in Joplin by Thanksgiving.

Community leaders announced the project at a news conference on the site of one of the new homes. The build is scheduled between Oct. 29 and Nov. 13 and will be take place in a neighborhood of Joplin that was in the affected area.

As the citizens of Joplin move into the rebuilding phase of their recovery, the need to help those who lost their homes has become evident. Of the nearly 7,500 homes damaged, some 43 percent were uninsured.

Ten for Joplin’s vision is to ignite volunteer efforts to rebuild Joplin by setting an example of what can be accomplished when businesses and communities come together to help one another.

“This is an exciting partnership that will not only provide 10 homes for 10 families, but will demonstrate the many benefits communities gain when working together,” said Joplin City Manager Mark Rohr. “As part of the Midwest, Tulsa Habitat and all of their volunteers and sponsors recognize the powerful reward one gets when helping their fellow neighbor.”

Donations and volunteers are needed to make this project a reality. The goal is to raise $800,000 in funds plus gifts in-kind and get 3,000 volunteers to support us on the blitz build. To date, Ten for Joplin has secured $400,000 toward this goal.

Companies that have signed up to be house sponsors are Hilti, Henry & Anne Zarrow Foundation, BKD CPAs & Advisors, Samson, TD Williamson, Inc. and Chase. Advanced Industrial Devices, Inc. also has signed up to sponsor half a house. Gift in-kind donations have been provided by Hilti, Thermal Windows, Inc. and Cor-A-Vent. United Way contributed tornado relief funds to help with the purchase of the ten lots.