Sorry if this isn't the right group, and please feel free to redirect me, but...
We're having a house built. It's under roof (including shingles), but the siding has not been installed yet. Today I noticed that the upstairs windows were left open, but didn't think much about it. Tonight it started pouring rain, so I drove over to close the windows. What I found scared me. There was water everywhere. Puddles all over the place. It was coming in via a hole in the roof where PVC has been stuck through... I assume that's for a vent that hasn't been finished? But it was also running down walls, i.e. the interior of the sheathing, or whatever the stuff is called. The one place it was not coming in was the open windows... I guess the rain was vertical enough. Would all this water be expected since the siding is not up, or is there a problem here? I plan to talk with the builder first thing in the morning, but would really appreciate opinions from neutral parties. TIA.
---Mick