08/28/2026
The valley on your roof is a highway. Every drop that lands on either slope ends up funneled through that one channel.
That is why valleys carry more water than any other part of the roof, and why they are worth looking at first. More volume means more wear, and it means anything that slows the water down, a bit of debris, a lifted shingle edge, a nail that worked its way up, has a much bigger effect there than it would out in the open field of the roof.
From the ground you can usually see the valley line clearly. Look for debris sitting in it, for shingle edges that have lifted along it, and for staining that runs down from it.
If your valleys are holding anything they should not be, that is a small fix now.
Book a No-BS Roof Assessment and we will come take a look.
(208) 759-4949
foothillroofingid.com
Roof! There it is.