Certainly a gutter system is a natural way to harvest the rain that washes over the roof as it directs it into a concentrated location and fills your barrel quite quickly most barrels fill in less than 1 4 of rain.
Rain barrel but no gutter.
Many people want to save rain water but do not have a gutter system.
1 walk around your house during the next rain and observe the water.
Use a hose clamp to secure the hose to the overflow spout.
These diverters will also form concentrated streams of water that you can channel or collect.
Most homes direct water into the barrel with gutters and downspouts but even homes without gutters can use a rain barrel.
You could instead attach the hose to a second rain barrel for a daisy chain of rain barrels.
Insert the other end of the hole in the gutter.
These diverters are not gutters.
The barrel would have to be open top and you d have to put it in a place where the downpour was greatest off the roof.