Asphalt Tile Valley overlap

sanzelc · January 9, 2016, 9:17am

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.

Thanks

Warm regards

Steve

jjonas · January 9, 2016, 9:28am

Hope this helps…

sanzelc · January 9, 2016, 3:45pm

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

rcloyd · January 10, 2016, 5:41am

Steven,

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.