Tool 02
Window Treatment Calculator
Estimate a dense exterior marker pattern using a two-inch planning grid. This is a quantity estimate, not a product-specific installation plan.
Why two inches?
USGS bird-window guidance describes a two-by-two-inch exterior pattern as one practical way to make glass more visible to birds. Product instructions and current conservation guidance should still govern final installation.
Source: USGS Bird Window Collisions.
Still deciding which panes to measure? Walk the glass from outside to look for reflections, clear sightlines and gaps in existing treatments before estimating coverage.