I just draw it in with my HomeGauge report software. I have sent the pictures to clients if it is just an example they need of how to do things properly.
What I see is three homes that need new roofs!
Would NEVER call it a defect UNLESS the roof looks like the 3 pictures on here. I see this configuration 3-4 times a week. RARELY see it causing issues.
Photos 1 & 3, the entire roof looks deteriorated, like I said. Photo 2, I can’t tell for sure that there is a problem besides discoloration.
Yep.
So the concensus is that downspout discharge from an upper roof onto a lower roof should not be called out?
Concentrated water discharge onto grade is a problem without a splash block, it erodes soil and can even cause concrete to spall, why would it be acceptable onto a roof surface? I can understand a small upper roof surface not being a concern but I am talking about upper roofs with like 300 sq ft. discharging onto <1 sq ft of asphalt shingles, in some cases onto or close to valley / base / kickout flashings. How can it be argued that the shingles under the concentrated water will wear at the same rate as the rest of the roof?
I believe that most roof drainage systems are installed this way because it is cheaper, easier and looks better but from the evidence I see every day, it is not the best way and I advise all of my clients of the situation.
Personally, I don’t care what the concensus is. I call it out every time, always have, always will.
Do you have a problem with water running down a long, steep roof valley? What’s the difference?
Rick:
I am with you all the way and I call it out anytime I see the damage. That works out to approximatly 99% of the time.
Kevin, in this case, wouldn’t it prudent to call it out BEFORE the damage is done? The missing downspout is in itself a defect. What are you waiting for?
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Sometimes
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Many differences
This is the 1% mentioned by Rick.
I can understand a small upper roof surface not being a concern.
That situation is everywhere and shingles exposed to concentrated water will wear faster than the other shingles on the roof, but if you’re going to call it out as a defective installation, You should be ready to show the alternative in an installation manual and you should be ready with a solution when they ask what you expect them to do. I’m not going to call something out as a defect if there are no alternatives, and I’m not going to tell anyone they have to install a downspout all the way down the slope of a roof on top of the shingles.
A soaker like is sometimes used at the base of tile valleys is a good start for a solution, although I don’t think I’ve ever seen one installed on a comp shingle roof to absorb the impact of water from a downspout.
Because a roof surface is designed to keep water out…soil…not so much.
It may not be the best way, but it is acceptable. And, as is shown in the pictures, the roof will deteriorate before the area you are talking about causes a problem.
Me too. 