Rainscreen Design Calculator

Cavity depth, drainage, and ventilation for rainscreen systems.

Wall area (sq ft)

Building height (ft)

Cavity depth (in)

Panel width (in)

Panel height (in)

Vent open area (%)

Design wind speed (mph)

Waste allowance (%)

Tab to move between fields

Panels to order

162

Design wind pressure (psf)

21.2

Vent open area (sq in)3,456

Cavity volume (cu ft)150

Cavity air changes/hr5.4

WRB/membrane area (sq ft)1,400

Furring channels (LF)277

How to Use This Calculator

Enter Wall Area in sq ft and Building Height in feet.
Set Cavity Depth in inches — 1.5 in is typical for most rainscreen systems.
Enter Panel Width and Panel Height, and Vent Open Area (%) split between top and bottom.
Set Design Wind Speed (mph) per ASCE 7 and Waste Allowance (%).
Review Panels to Order, Cavity Air Changes/hr, Design Wind Pressure (psf), WRB Area, and Furring Channels (LF).

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