Ventilation Solutions For Steep-Slope Commercial Roofing

What ’ s The Big Deal About Ventilation? What About Roof Ventilation…. Does it matter? Ventilation

Benefits of Proper Ventilation Ventilation Optimizes the life of the roof Prevents moisture build-up that causes mold & mildew Prevents ice damming Insulation Ventilation Improves sustainability Reduces HVAC costs

Physics of Ventilation Thermal Effect Warm Air Rises Cool Air Descends Impact of Wind High pressures force air in at the eave Low pressures pull air out at the ridge Ventilation

Net Free Area Defined as the portion of the opening in the vent that actually ventilates. Also defined as the total unobstructed area through which air can enter or exhaust a non-powered vent. Ventilation

Building / Roof Type: There is a great need where projects involve homes, churches, schools and other buildings with large steep-slope, cathedral shingle, or metal roofs. Ventilation Need

HOT CLIMATES Does it matter? Ventilation

Hot temperatures create a land of extremes for a roof Highest temperatures High moisture & humidity levels Highest energy consumption Large roof sizes & complex geometries Ventilation

Condensation & Mold: Are they concerns here? You Bet! Texas, Florida, California and Arizona have the highest number of mold related insurance claims in the country In spite of new coverage exclusions, claims & litigation continue. Source: International Risk Management Institute Ventilation

Temperatures & Air Conditioning Demands: Are they higher than average? Yes! Texas, California, New Mexico, Arizona & Florida are the five hottest states in the country. Texas, California and Florida are the top (3) energy consuming States in the U.S. Texas, California and Florida are the top (3) electricity consuming States in the U.S. Source: US Energy Information Administration (EIA) Ventilation

Proper Roof Ventilation in HOT CLIMATES Does Matter! To prevent mold & mildew To maintain a “ cool roof ” and optimize shingle and roof deck life To reduce radiant heating and energy waste from the increased demand for air conditioning Ventilation

COLD CLIMATES Does it matter? Ventilation

Snow Loads and Ice Damning Are they concerns? Yes! Heavy snow loads create a serious burden on roofing structures. Ice Damns are dangerous for the roof and a threat to human life. Need to keep the roof cold with proper roof ventilation Ventilation

Snow Loads and Ice Damning Are they concerns? Without proper ventilation, heat loss occurs, melting snow on the roof. Snow melt results in pooling water, ice damns, and eventually roof damage. Roof damage can lead to water penetration and damage to the interior of the structure Yes! Ventilation

Proper Roof Ventilation in COLD CLIMATES Does Matter! To prevent ice damning To maintain a “ cold roof ” and optimize shingle and roof deck life To reduce heat loss through conduction, thus preventing snow melt that may result in leaks

Ventilation Products ACFoam® Crossvent® & Crossvent®RB address part of the problem! R-value of 6.0 per inch of insulation Cross-ventilating air space above the roof deck and insulation, but below the roof covering Nailable surface for shingles, metal, etc.

Ventilation Products Ventilation products available today... Most products available today are geared towards residential homes Ventilation is only as good as the amount of airflow that is allowed to intake and exhaust through the system Low NFA ratings are inadequate for large commercial roof systems With longer runs, most products provide inadequate ventilation after a 30 ’ run Most products provide inadequate ventilation after 75 ’ widths

Ventilation Products Crossvent® & Crossvent®RB are great products but…. How do we insure a proper supply of air to CROSSVENT® at the eave? How do we exhaust proper volumes of air at the ridge? Could we deliver a complete, balanced roof ventilation system?

19 Ventilation Products And Now We Can! One System. One Manufacturer.

Ventilation Products Techni-Flo™ Engineered Ventilation System consists of: 1.Techni-Flo™EV Eave Vent to supply intake air 2.ACFoam CROSSVENT or CROSSVENT RB Vented Nail Base to channel air 3.Techni-Flo™RV Ridge Vent to exhaust air All (3) components are specifically engineered to work together to reliably deliver the ventilation required for each unique steep-slope roof – residential or commercial.

 A CROSSVENT® compatible commercial- grade intake vent engineered to supply intake air for each specific residential or commercial roof structure.  NFAs from 12 to 40+ instead of 6 to 9 NFAs common in most off-the-shelf ventilation products.  Supplied in 12-foot lengths with slotted fastener holes for perfect faster placement and faster installation.  Includes Kynar finished fascia. Choose from over 30 colors & finishes. Ventilation - Eave Products

22 Ventilation - Ridge Products  A CROSSVENT® compatible ridge vent engineered to fit the roof perfectly & exhaust air at rates required to form a balanced ventilation system.  Commercial-grade, all metal construction and 30+ Kynar finishes insure years of maintenance-free performance.  Supplied in 12-foot lengths with slotted fastener holes and snap-on covers for fast and easy installation.

Ventilation - Ridge Products  Easy snap on design  Slotted fastening holes for proper thermal movement and correct fastener placement/spacing  Built for both standing seam and shingle construction  30+ finishes ensures a match to any architectural style Exploded View

Ventilation Products Product In Action!

Ventilation Products Product In Action!

Ventilation Products Product In Action!

Ventilation Products Engineered Ventilation Systems for Residential & Commercial Roof Structures The Only Complete Ventilation and Wind Uplift Warranty in the Industry

Ventilation Products How To Order  Talk to your local Atlas sales representative or call one of our polyiso sales offices.  Fill out print approval documents available on Atlas Roofing Web site:  Fax order requests to  for additional details.

Ventilation Products