Repair Design

Passive Ventilation – The Key to Repairing
Wet Split Face Block and Brick Buildings

How Our Passive Ventilation and Flashing Designs Work

Illustration of wickright passive ventilation system for parapet with capstone on top installed

There is a WickRight Passive Ventilation® device for almost every building configuration. But if you have unique situation, Bob Kelly will design a custom device or repair for your building. These illustrations show the most commonly installed WickRight products:

1. Patent-Pending WickRight Vapor Permeable Membrane™ –
Our membrane is installed on top of the parapet wall with capstones. Allows moisture vapor to exit the wall and protects against moisture intrusion because water molecules are too large to pass through it.

2. Patented WickRight Capstone Vented Drip Edge™ –
Our vented drip edge is installed on top of the Membrane, typically on the exterior side of the a parapet wall under a capstone. It protects the parapet wall from moisture intrusion and allows fresh air to pass over the top of the wall.

3. Patent-Pending WickRight Vented Receiver Clip™ –
Our vented receiver clip is installed on top of the Membrane on the interior side of the parapet wall. It acts as a combination Capstone Vented Drip Edge with a built-in receiver clip for our Off Set Counter Flashing that protect the Roof Vent.

4. Patented WickRight Roof Vent™ –
Our roof vent is installed vertically against the parapet wall at the junction of the parapet wall and the roof deck. It acts as a linear chimney, exhausting heat and moisture vapor from the roof system.

5. WickRight Counter Flashings and Bug Screen –
protects the top of the WickRight Roof Vent from moisture intrusion and the bug screen prevents insects from entering the building.

Illustration WickRight Metal Coping Vent and Roof Vent installed on parapet

6. Patented WickRight Metal Coping Vent™ –
Our metal coping vent is installed on top of the parapet wall under metal copings (and on some mansard roofs). It allows air flow over the top of the wall and moisture vapor release from the wall core.

Our metal coping profile is designed to protect the parapet wall from wind driven rain on both sides. The exterior leg of our metal coping profile is a 5" deep. On the interior side of our metal coping profile is a built-in receiver clip to attach counter flashing.

When installed with WickRight Roof VRS, the interior side of our metal coping profile protects the entire interior side of the parapet and acts as a roof termination.

Illustration of WickRight Clay Coping vent with Roof Vent installed on parapet

7. WickRight Clay Coping Vent™ –
Our clay coping vent is installed on top of the parapet wall under our Vapor Permeable Membrane, under clay copings. It allows air flow over the top of the wall and moisture vapor release from the wall core. The Vapor Permeable Membrane protects the wall from any moisture intrusion or condensation build-up.

We have a unique installation technique for clay copings that prevents moisture intrusion between the clay bells. We also have a custom Counter Flashing Receiver Clip profile for use under Clay Copings when the WickRight Roof Vent is installed that protects the interior side of the parapet.

View WickRight Passive Ventilation installations

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WickRight Truss Reinforcement Brackets

Computational Fluid Dynamic Simulation –

WickRight Metal Coping Vent

Winter 30º F: Simulation video shows how a 14 mph wind enters the Coping Vent, the wind passes across the top of the wall and into the open block cores, then exits on the opposite side of the wall. This creates 6.4 cubic foot per minute (cfm) of fresh airflow per foot of wall length, and 2.27 pounds of lift force (lbf) per foot of wall length to draw moisture out of the wall.
Summer 80º F: Results indicate that when a 18 mph wind enters the Coping Vent, the wind passes across the top of the wall and into the open block cores, then exits on the opposite side of the wall, it creates 7.2 cubic foot per minute (cfm) of fresh airflow per foot of wall length, and 7.87 pounds of lift force (lbf) per foot of wall length to draw moisture out of the wall.