Able to handle carry more water.
Overall difference in water volume between 5 and 6 gutter.
For those torrential downpours 6 k style gutter can handle a larger volume of water than 5 k style gutter.
It means that the gutter will not be overfilled during periods of heavy rains as there is enough space inside the gutter.
It is important because the heavy weight of the water can cause the gutter to sag.
This further decreases the chance for overflow of your gutter even during the hardest of windblown downpours.
Pro s in having a 6 gutter system.
To find out that is better the weight of the dimensions considered should be compared when both gutters are filled with water.
In the past residential homes have 5 gutters and 2 x3 downspouts and commercial buildings have 6 gutters with 3 x4 downspouts.
Also the steeper the pitch of the roof the more wind driven rain it will take.
In this round the 6 inch gutters.
If you want the best performance from your gutters and have a larger roof area then 6 gutters along with the larger 3 x 4 leaders downspouts are able to handle approximately 50 more water than a regular 5 gutter.
K style can handle more water than half round and a 5 k style can handle about much water as 6 half round.
A larger gutter actually will hold more debris than a standard five inch gutter and is not self cleaning.
With these systems a large load of water can overwhelm 5 inch troughs with their swifter flow rates.
Six inch troughs can hold twice as much water as 5 inch gutters.
Now pay attention to the weight of the gutters.
The difference is about 50 of the amount of water treated by the 5 inch gutter.
Six inch gutter will let the leaves and other debris wash right down the downspout with no need for covers.