Expend a loft surface along faces

I have a surface resulted from a loft curves. I have to extend the surface, extending the faces until it will close to one end. Any suggestions are apreciated . Thank you!extend loft.gh (7.2 KB)

Is Extrude to point what you are looking for?

faces must be continous, If i extrude to a point the planarity of the faces will brake. The faces dont intersect into a point

Then i misunderstood you.

I used extend face (downloaded from forumum discutions) but the face extension doesnt considers the intersection between adiacent faces.

So in a sense, you got a pyramid, that is untrimmed?
And you want it to be trimmed?