Lead Flat Roof Corner Flashings

Rise & run

Measure the vertical rise and horizontal run between the same two points.

Use the same unit for both, such as mm or cm. Run is not the sloping roof length or automatically the full building width.

Enter your measurements to begin.

Photo estimate

Use a square-on view of the roof profile, with a known horizontal reference in the same plane.

The photo box opens your camera on supported phones and tablets. On a computer, choose a photo file or drop one into the box.

Processed on your device by this tool. JPG, PNG or WebP, up to 20 MB and 24 megapixels. Export HEIC as JPG first.

1. Roof slope · 0/2 points
2. Horizontal reference · 0/2 points

Tap the photo box or choose a saved photo.

Tap four points: two on the roof slope, then two on a level reference. Drag points to adjust. Use long lines for a better estimate.

The reference line corrects camera tilt, not perspective or lens distortion. A photo cannot guarantee the angle needed for manufacture.