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What is VENTLOC®?

Ventloc® provides superior wind uplift resistance at wind speeds up to 130 mph. Designed with tongue and groove sides and a patented venting edge that enables the rapid transfer of over paver to under paver pressures, this unique combination results in a significant enhancement of lightweight paver system wind uplift resistance. The patented interlocking tongue and groove design creates a monolithic paver surface in which an individual paver is no longer the
weakest link.

Sized at 11 3/4” x 17 5/8” x 2”, Ventloc® is stocked in a Natural color with a Natural finish. Ventloc® is available in all of Hanover’s standard colors as well as a Tudor® finish. Additional colors are available when quantities permit. When reflective properties are important, Glacier White is available. U.S. Patent #5,887,397 and other patents pending.

 

  • • Vents enable rapid transfer of air pressures
  • • Patented tongue and groove design
  • • Limited pedestrian use
  • • Multi-directional under surface water drainage
  • • Stocked in Natural Color with Natural Finish
    • • Available in Hanover's standard colors as well as Glacier White
  • • Stocked in 2 weights with custom weights available

Wind Pressures & Uplift

When wind flows around a building, it produces high suction pressures, mainly at the leading edges. When the wind is forced over the top of a building roof’s edge, flow separation” occurs (shown on the right) creating a negative uplifting pressure.

 

Wind Uplift occurs when wind flow pressures create a strong lifting effect, much like the effect on airplane wings. Wind flow over a roof creates vortices that create an uplifting force on roof components. The unique Ventloc® air transfer passageways help negate these positive and negative pressures, providing stability to the paver
ballast system.

Download Hanover’s Ventloc® Brochure for more detailed information about Wind Pressure & Uplift.

wind uplift

The Vents Make A Difference

Ventloc’s patented venting edge enables the rapid transfer of over paver to under paver pressures. The transfer of pressures through Ventloc’s vented edge has been tested and proven to provide the best lightweight paver wind uplift resistance in the industry.

 

Ventloc® was tested at Intertek ATI incorporating three different conditions - no parapet,12” parapet and 24” parapet – with wind speeds up to 130 mph. In all three conditions, no movement was observed.

Pressures were recorded at four different locations – top, bottom and both ends. Ventloc’s equalization was maintained at a near zero value from the top surface to the underneath side of the paver, clearly demonstrating that the vents are transferring pressures. Refer to Ventloc® Test Report 11.4.15. Ventloc’s ability to equalize pressures, along with its true interlocking design, provides a much more wind resistant installation than pavers without vents.

 

 

 

Relative Strengths Standard Weight• Compressive: 5,255 psi• Absorption: 5.89%
• Density: 116.58 lb/ft3
Relative Strengths Heavy Weight• Compressive: 7,689 psi
• Absorption: 3.93%
• Density: 144.95 lb/ft3
 

Installation Guidelines

Ventloc’s patented tongue and groove design creates an interlocking roof ballast system in which an individual paver is no longer the weakest link. Download Ventloc® Installation Guidelines. When reviewing these guidelines, take the conditions and situations unique to the location and individual project into consideration. Hanover® will need specific information before suggesting installation procedures. Project analysis is required before specifying Ventloc® Pavers.

 

Hanover® commissions several wind consultants and engineers who have many years of experience dealing with roof wind design. Complete the Wind Design Criteria form and submit to Hanover®. Each form will be reviewed by our consultants.

installation