Use the chart below to figure out how many extra downspouts you need.
Proper drpp on rain gutters.
Area and flow in table 1 4 are based on 1 in 25 mm of rainfall per hour.
Purchase at least the total length of gutter along with additional materials.
It s not uncommon for homeowners to hang the gutters so that the front edge is slumping forward too much.
This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.
Measure and record the distance from the bottom of the fascia board to this nail.
Secure it with eight pop rivets or sheet metal screws.
As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.
Divide these areas by the local rain fall rate in inches per hour to determine the actual roof area to be served by the gutter diameter.
For example for every 10 feet of gutter they need to drop 1 2 inch from the high end to the downspout.
Granade roofing on another awesome seamless gutter project adjusting a section of gutter to get the proper flow of water.
When you look at a rain gutter system from.
Measuring the roof and purchasing materials 1.
Gutters need to be pitched at a 5 degree angle.
From chart 1 2 it is determined that a 9 5 in 241 mm half round gutter should be used.
Adding a 2 by 3 rectangular downspout for instance boosts your gutter s capacity by 600 square feet of drainage area.
Gutter placement people usually think that gutters should be.
Below the shingles on the high side of the gutter run.
Slope calculation this is a critical aspect in any rain gutter installation.
For every 10 feet of gutter from this measurement and mark this distance at the low end of the gutter run.
When installing gutters set the proper slope by driving a nail 1 2 in.
Measure the length of the roof that you re working on.
Head to a home improvement store for.
Wrap the aluminum strip tight around the underside of the gutter.
As with gutters a downspout s capacity must match or exceed the expected runoff.
Form strip miter joint at corner cover the joint between two lengths of gutter at each corner with a strip miter a 3 inch wide strip of aluminum.
This allows the water to flow gently but.
Cut a triangular section from.
For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.
Gutters should slope an inch or two for every 40 feet.