The gap can vary some because the gutters must slope towards the downspout.
Pitch of roof how low gutters are hung.
If the gutter is tilting away from your house it could be causing an overflow particularly during heavy storms.
Steeper pitches require less clearance.
This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.
Gutter can be run level for appearance but addition downspout will be necessary see section on proper gutter and downspout sizing.
Gutters hung too high or too low.
Or you can slope the gutters down from each end toward a single downspout placed in the middle of the run.
3 5 centimeters is in the 2 3 inch range.
Feed a threaded gutter spike through the hole in the front of your gutter.
Align the end of the threaded spike with the hole in the front of your gutter and push the end through by about 1 2 inch 1 3 cm.
Any more and you run the risk of water running off the tile and overshooting the gutter.
The pitch and tilt of your gutters make all of the difference.
Gutters should be hung where a straight edge laying on your roof shingles can easily extend over the front lip of the gutter this is the proper installment location for the high point of the gutter.
Next place a ladder at the left side of the house and measure from the roof down to the gutter.
Look for a 7 8 in 18 20 cm gutter spike or screw that has at least 2 inches 5 1 cm of threading on the end.
Working out gutter slope as a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.
For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.
2 your gutters aren t positioned correctly.
That said gutters need to be completely level from front to back or water could spill over either edge.
Gutters should be placed below the extended roof line so that snow and ice can slide clear.
For gutter runs longer than 40 feet it s best to pitch the gutter down from the middle to a downspout at each end.
For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end.
If the pitch is too gentle water will just fill up in the gutters until it overflows and a too sharp pitch isn t aesthetically pleasing.
If you live in a warm place with sporadic rain you can hang gutter hangers close to the middle of the gutter with a spacing of no more than 36 inches or three feet apart from the center.
Gutters should slope an inch or two for every 40 feet.
The pitch of gutter heading towards a downspout can also cause overflow if it s too steep.
To ensure that gutters drain properly make certain they slope inch for every 10 feet toward a downspout.
Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires.
