How To Slope A Gutter With False Bottom

1 sq in downspout cross section per 100 sq ft of roof drained.

How to slope a gutter with false bottom. Modern roofing care and repair creative homeowner press. The amount of collected water increases until it spills over the sides of the gutter. Max run per downspout of 40 feet. They re inexpensive and easy to install.

Or you can slope the gutters down from each end toward a single downspout placed in the middle of the run. Whereas the fascia gutters bottom trough is 2 1 4 inches up to 4 1 2 inches as it reaches the top of its 5 1 4 inch depth. Typically a section of five inch gutter that is one foot long can hold up to 1 2 gallons of water whereas a section of six inch gutter that is one. This smaller bottom trough of the fascia gutter will retain 50 less water than the ogee gutter sloped at the same degree there should be no more than a 1 2 of water in the gutter after it has stopped raining.

This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout. If it s under sloped it can allow excess water to gather in gutters and allows the gutters to expand and contract and can cause problems with the corners and downspout connections. Gutters need to slope towards the downspouts in order to function properly. Ask someone to hold the gutter while you loosen and remove the gutter brackets or hangers.

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. Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires. Less than 20. Gutter extensions attached to the bottom of the downspout will discharge water well beyond the foundation.

If gutters don t slope water gathers in them. The gutter should have a quarter inch of slope per 10 feet. Rules of thumb for gutters. To ensure that gutters drain properly make certain they slope inch for every 10 feet toward a downspout.

Put a temporary screw at the back to adjust the pitch. Slope 1 8 inch per running foot. For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end. Your supplier should have these simple facts or at least a brochure at the mega store.

It the k style or wide bottom fascia gutters are over sloped it can make the house appear tilted and look ill fitting. If gutters slope too severely they don t hold water and water could splash over the sides in heavy rain. The standard slope for rain gutters is half of an inch for every 10 feet. For gutter runs longer than 40 feet it s best to pitch the gutter down from the middle to a downspout at each end.

To get started measure the side of the house directly under the gutter to determine its length in feet. Pull the gutter down about 3 quarters of an inch lower than it originally was. 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.