About Wind Vented Systems
| In every roof assembly there are two forces of pressure which act on a roof due to the dynamics of wind over a building causing a negative uplift (suction) pressure and the internal de-pressurization of buildings causing a positive pressure outward, as shown in the figure 1, to the right. As wind blows upward a wall and over a roof surface, wind vortices are formed over the roof edge, concentrated in the perimeter and corner areas of a roof. |  Figure 1 |
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| The wind generated vacuum pressures typically found on
a roof, result in uplift forces (similar to lift of an airplane wing as
shown in figure 2). The two pressures acting on a roof assembly are 1)
Positive air pressure from inside the building and 2) negative (suction)
air pressure acting on the roof surface. |
 Figure 2 |
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| 2001 Company is unlike other roofing companies which use conventionally installed roof systems, i.e. mechanically attached or fully adhered roofs that are susceptible to roof damage from negatively pressured wind uplift forces as shown in figure 3. |  Figure 3 |
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| The 2001 Company roof membrane as shown in figure 4 is installed loosely over the field of the roof and is secured at the roof perimeter and around roof penetrations. |  Figure 4 |
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| The 2001 Co. roof system relies on the use
of patented air seal techniques and one-way equalizer valves to securely
the roof in place. The valves are placed in the roof corners and along
the perimeter edge in wind vortex intensity areas, to avoiding roof damage
from wind uplift, as the uplift forces are transferred through the roof
assembly to the roof deck and building structure. The 2001 Company roof is effectively secured tightly to the underlying substrate as shown in Figures 5A) and 5B) for an EPDM roof membrane and figures 6a) and 6b) for a thermoplastic roof membrane. |
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