A little longer and you run the risk of water draining through the tiles and overflowing the gutter. One problem you may encounter is that the shingles extend too far out at the base of the roof. Roof tile installation guidelines generally state that roof tiles should not extend more than ½ inch to ¾ inch beyond the dripping edge of the roof covering. In many markets, drip-proof borders aren't coded, meaning they're not mandatory.
In these cases, roofers can install shingles deep in the gutters. This can cause sections of gutters to fill with debris and accumulate trapped pools of water. Long shingles can absorb moisture and return it to the roof and cause more damage. Simply extend the location of the downspout over the roof to move the water flow directly to the lower gutter system.
If the gap between the roof, the gutters and the cladding is too large, it can cause spills, peeling paint, and possible damage to the roof and fascia. I will probably place them in my own house eventually. I have a mix of copper and aluminum gutters with a mix of semi-round and K-style channels. He says he knows that other people place the gutters behind those that leak, but he has found that, in winter, ice can build up between the drip edge and the gutter and then accumulate again below the drip edge and fall onto the roof.
This leaves a visible and unattractive mark along the path of the water that pours out as it passes through the roof. All that is required is to pay attention to the basic information in the plumbing code about managing your roof's water. I would take a look at one of his previous works if you want to see what water does when it tries to fall from the ceiling. An unfortunate truth about installing gutters is that you may not be able to meet all of your rainwater management needs with a conventional gutter system.
On low-sloped roofs, you'll see water flowing back up to the finished fascia and leaves debris marks. I read that the start of a gutter should be low enough that, if you take a level and place it on the roof, it clears the front edge of the gutter. As a homeowner, it's important to consider every aspect, from the size of the gutters to the materials that will be used. Water needs to drain, of course, but a gutter installation like this is unattractive and unnecessary.
The report notes that, when this occurs, water erodes the granules of the tiles of a conventional asphalt tile roof.
