Can’t draw or close a roof face

To draw, pick Roof (P) and click the corners of one face, then the first corner again. If the face won’t close, the message at the bottom of the map says why — too few corners, a crossing outline, a face that’s too small.

Most drawing problems come from the wrong tool or an outline the editor can’t turn into a roof face. How to trace a face from start to finish: Draw roof faces.

Clicks don’t add corners

Check the tool on the left. Select moves the map and picks faces; corners are added only with Roof — press it or P. On a phone, the tools are in the menu at the top left.

The editor says why

What you see	What to do
A roof face needs at least 3 corners	Click at least three corners before you close the face.
The outline crosses itself — move a corner or undo the last one (Backspace)	Two edges of the face cross. Press `Backspace` and click the corner in another place.
This corner is already in the outline	You clicked a corner of this face a second time. To close the face, click its first corner or press `Enter`.
This face is too small	Zoom in and trace a bigger face, or skip roof parts too small for a panel.
The line runs past a corner of the face — end it exactly on that corner	When you split a face, click right on the corner the line goes through.
Could not split this face — try clicking exactly on its edges	Start and end the split line on the face’s edges.

The face is drawn, but panels won’t go on it

What you see	What to do
This face has no pitch yet — measure or set it first	Google couldn’t measure the face. Select it and set the pitch — see Roof pitch: measured or set by hand.
No faces to fill (north-facing faces are skipped — fill them one by one)	Fill roof (X) leaves north-facing faces empty. Select the face and press Fill this face with panels.

Started over by mistake? Esc cancels the face you’re drawing, and Undo brings back the last change.

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Updated October 6, 2026