@gaieus said:

The problem is that the edges bounding that area are not coplanar thus they will never close a face despite they form a closed loop. With this piece,you can do two things:

• restart it and take care of the edges forming a coplanar and closed loop (this is what I'd do)
• draw a diagonal line to divide it into two triangles (this case the faces would form) and soften the line with the Ctrl + tool (you have some hidden lines around anyway - softening is better than hiding though)
  This is what I did in the attached file.

Thank you,

Thats perfect,thank you for that neat little trick ctrl+eraser works out perfect,

I'm trying to make a backed valley rafter in sketchup,for some reason I cant get one of the backed side to form a face

I'm on dial so I can't watch the video tuts online,could some one explain to me what I'm doing wrong.

backed valley2.skp