Asphalt Tile Valley overlap

When making valleys with Architectural tiles, I will see times like in photo where the tiles line up such that a lower tile is on top of a higher tile where it would seem water can intrude as it runs down hill.

Is this truly a flaw or because of the varying heights of tiles or something and layers, is it a non-issue in valleys.

Also the valleys stay wet. Is that just normal for a rainy day as more water runs down it, or indicative of holding moisture where it should be running down.


Warm regards





Hope this helps…

So does it look like the vertical shingle is upside down on this one then? and should it be called out


It is referred to as a California cut-valley in the roofing world. It is quite common and works great (does not leak) if installed properly. It eliminates the big, ugly metal valley flashings.