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How do I determine the size of my gutters?

Updated February 21, 2017

Rain gutters are an important part of a home's roofing system. Without properly sized gutters for a region's weather elements, the integrity of a home's foundation can be compromised with excessive water retention.

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Rain gutters provide an outlet and direction for flowing rain water coming off a rooftop. This allows the water to be manoeuvred into drainage, away from the home's immediate exterior.


Rain gutters can vary in size. If a new home is purchased, but the sizing isn't known, take a ladder and climb up with a measuring tape. Measure the diameter of the gutter. Typically, gutters range in size from 10 to 15 cm (4 inches to 6 inches).


Knowing the size of the gutters is important because it gives homeowners an idea of what kind of rain flow the assembly can withstand. If a region is prone to large rain storms or snow, a larger diameter gutter is a better choice for overall functionality over time.

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About the Author

Writing professionally since 2010, Amy Rodriguez cultivates successful cacti, succulents, bulbs, carnivorous plants and orchids at home. With an electronics degree and more than 10 years of experience, she applies her love of gadgets to the gardening world as she continues her education through college classes and gardening activities.

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