5 inch standard k style gutter shop 5 gutterbrush.
How to measure rain gutter size.
Measure the roof to get the watershed area the area from which water will run off.
The capacity of a sloped rectangular gutter may be approximated by using a gutter cross section area not less than that of a semicircular gutter and a depth to width ratio of at least 0 75.
Multiply length peak to eave by width to determine.
6 inch 7 960 square feet.
5 inch 5 520 square feet.
How do you calculate gutter size.
The steeper a roof s pitch the more windblown rain it can collect.
Measure length of twine mark the measurement with a piece of tape and then pull the twine off of the other end of the gutter.
See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.
A steep pitched.
Find the width of the gutters.
Use your tape measure to determine the length of the twine marking down this calculation.
Gutters typically come in 5 or 6 in 13 or 15 cm sizes and can be k style or half round place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach the gutters.
If a new home is purchased but the sizing isn t known take a ladder and climb up with a measuring tape.
Then use the chart below to see what size gutter you need.
How to measure downspouts.
How to calculate gutter and downspout capacity.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
Furthermore the standard norm for gutters among many in the rain carrying industry is to allow 1 square inch of outlet opening in the gutter for every 100 square feet of roof area being drained.
Find the rainfall intensity for your locale.
Downspout sizes must not exceed the bottom width of the gutter.
Measure your gutter across the top from the back where the gutter meets the home to the outer edge.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
Roof slope rainwater must not overrun the front edge of the gutter.
Carefully climb up the ladder and measure the width of the opening at the top of the gutters.
Typically gutters range in size from 10 to 15 cm 4 inches to 6 inches.
Adjusting for pitch and rainfall.
