Re-roofing with VacuSeal
When it comes time to specify a re-roofing system for your next project, one of the major factors to consider is the current building occupants. Leaving an existing roof in place and re-roofing with a new membrane can involve installing additional fasteners through the deck, which would be noisy and annoying to occupants. Specifying a vent secured roofing system like VacuSeal allows the new membrane to be installed over the existing roof without fasteners. The vents are acting as a ballast holding the new membrane to the existing membrane. Insulation can also be added.
What is VacuSeal? VacuSeal Vent Secured Roofing System incorporates the use of a loose-laid thermoset or thermoplastic membrane in conjunction with a sealed roofing/substrate assembly and V2T Roof Vents. The roof vents' locations are pre-determined by engineered drawings provided by Carlisle and are based on project location and conditions.
VacuSeal systems work because of the Venturi Principle, in which a vacuum is created whenever the speed of the wind moves faster than air in surrounding areas. Each V2T Vent is designed to create that vacuum and leverage its suction to pull air out from under the membrane and lock vents into place. Uplift pressures are negated by the greater vacuum force created by each vent. Air distribution strips are positioned beneath the membrane, linking the V2T Vents and facilitating air movement underneath the membrane. All gaps and joints in the deck must be sealed in accordance with Carlisle's published details, or the deck must be sealed with a continuous air barrier along the perimeter and around all penetrations. The insulation is loose-laid in one or more layers and overlaid with a ½-inch gypsum cover board.
This method of membrane attachment reduces installation time and minimizes the need for traditional fastening methods. Because the membrane is loose-laid, traditional bonding adhesive is eliminated. Unlike systems that rely on bonding adhesives, VacuSeal roofs can be installed in cold weather and have no VOCs or odors.
VacuSeal V2T Vents are made from UV-resistant PVC, contain no moving parts, require no penetrations, and provide effective performance regardless of wind direction. VacuSeal roofs are UL Certified with uplift certification at 195 psf negative pressure.
For information regarding VacuSeal, check out Spec Supplement G-15-20 here.
Watch a short video overview of the system here.
Contact Craig Tyler at [email protected] with questions.
What is VacuSeal? VacuSeal Vent Secured Roofing System incorporates the use of a loose-laid thermoset or thermoplastic membrane in conjunction with a sealed roofing/substrate assembly and V2T Roof Vents. The roof vents' locations are pre-determined by engineered drawings provided by Carlisle and are based on project location and conditions.
VacuSeal systems work because of the Venturi Principle, in which a vacuum is created whenever the speed of the wind moves faster than air in surrounding areas. Each V2T Vent is designed to create that vacuum and leverage its suction to pull air out from under the membrane and lock vents into place. Uplift pressures are negated by the greater vacuum force created by each vent. Air distribution strips are positioned beneath the membrane, linking the V2T Vents and facilitating air movement underneath the membrane. All gaps and joints in the deck must be sealed in accordance with Carlisle's published details, or the deck must be sealed with a continuous air barrier along the perimeter and around all penetrations. The insulation is loose-laid in one or more layers and overlaid with a ½-inch gypsum cover board.
This method of membrane attachment reduces installation time and minimizes the need for traditional fastening methods. Because the membrane is loose-laid, traditional bonding adhesive is eliminated. Unlike systems that rely on bonding adhesives, VacuSeal roofs can be installed in cold weather and have no VOCs or odors.
VacuSeal V2T Vents are made from UV-resistant PVC, contain no moving parts, require no penetrations, and provide effective performance regardless of wind direction. VacuSeal roofs are UL Certified with uplift certification at 195 psf negative pressure.
For information regarding VacuSeal, check out Spec Supplement G-15-20 here.
Watch a short video overview of the system here.
Contact Craig Tyler at [email protected] with questions.
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