Gutter Downspout Pouring Onto Roof

When gutters and downspouts from an upper roof spill out onto a lower roof damage can occur to fiberglass asphalt shingles.

Gutter downspout pouring onto roof. For example a 30 year roof is going to be lucky to last 15 years under these conditions. Erosion might be visible in 1 2 years or less or potentially be less severe all depending on the amount and force of water being discharged onto the shingles. It depends on who you ask this question. Whether it s curved and tweaked so water exiting it flows across the roof pretty smoothly or splashes onto it with some force will also make a difference.

There is no building code citation that forbids a gutter from draining onto a lower roof. Also a gutter in a dormer that had no downspout but had the back end towards the roof surface open and the water just flows out the back and onto the lower roof. Downspout draining to roof with siding damage obvious. Leaving the gutters off altogether is not usually a good option unless the roof is very very small because the rain dripping off the edge will wear on the roof below.

Excessive water pouring onto the roof will cut the life of your roof in half or maybe more. More product details close. Metal or vinyl downspouts this versatile downspout has a lifetime guarantee. Compatible with 2 in.

Mount the gutter so that the edge without the downspout is slightly higher than the end with the sleeve. The shingle grit on a shingle s surface can erode under a gutter outlet or downspout. Water flooding from this downspout can easily find its way into the roof and wall structures. Use the downspout to redirect runoff and help prevent garden erosion and foundation damage.

He doesn t respond because he wants to continue. So it s a matter of what the home inspector or contractor considers acceptable. I did a warranty inspection on a big house in a development. Generally a contractor that drains a gutter onto a lower roof will say that it is an industry standard whereas a contractor that rants against it will say that it s not best building practice.

Check out these example photos below of shingle damage caused by downspout run off. It s getting serious because the ground is fully saturated. I have also honestly not had a chance to see how the lower gutter systems on the houses with the extended upper downspouts perform when all that water channeled off the upper roof is dumped. I have asked him to add extension to the downspout along with burying the downspouts on that side with mine.

It s careless water damage with intent to harm. Attach the gutter strip to the fascia or roof edge with nails and gutter straps. Many instances of downspouts from upper dormer gutters emptying directly onto the lower roof.