Cut a starter hole in the gutter with a chisel drill or sabre saw and nibble out the finished opening with tin snips.
How to slope a gutter with false bottom.
To calculate gutter slope attach one end of a long piece of string to the highest point of your gutter and the other end at the location of your downspout.
Ask someone to hold the gutter while you loosen and remove the gutter brackets or hangers.
The gutter should have a quarter inch of slope per 10 feet.
Once the gutter is properly pitched re install the gutter brackets.
How to determine gutter slope.
Use a string level to ensure the string is completely parallel to the ground.
Pull the gutter down about 3 quarters of an inch lower than it originally was.
Measure carefully to determine the best location for the outlet fitting.
The standard slope for rain gutters is half of an inch for every 10 feet.
For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end.
Then fasten one end of the string at the highest point of the gutter and the other at the spot where the downspout will be.
This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout.
Put a temporary screw at the back to adjust the pitch.
If your fascia is fairly level you can usually measure off it to help you figure out how much slope you are putting on the gutter.
For spans longer than 40 feet it s wise to have a downspout on each end and start the high spot of the gutter in the center.
They re inexpensive and easy to install.
Less than 20.
First determine the location of each one of your downspouts.
I like the downspout material extended four or five feet and screwed on says reggie marston president of residential equity management home inspections in springfield va.
Then set the fitting on the bottom of the gutter and trace around it.
Gutter extensions attached to the bottom of the downspout will discharge water well beyond the foundation.
Next place a ladder at the left side of the house and measure from the roof down to the gutter.
The best way to calculate the slope of a gutter run before hanging it is to use a long string and a string level.