Gutters are an important part of your home’s roofing system. If they are not the proper sizing, they can’t do their job effectively. Gutters come in a variety of widths and sizes. Most residential gutters are 5 to 6 inches wide.

Undersized gutters will not hold all of the rainwater from your roof and can create a waterfall effect. Overflowing rainwater can cause damage to your roof, walls, foundation, basement, and landscaping.


  1. Roof Pitch

    The pitch of the roof measures how steep a roof is. The steeper the roof, the faster the rainwater enters the gutter. Most residential homes have pitches ranging between 4:12 (low pitch) to 9:12 (steep) and steeper. A steeper roof requires larger gutters than a lower pitched roof.

  2. Roof Size (Area)

    A larger roof will collect more rainwater and in turn require a larger gutter. Undersized gutters on a large and/or steep roof can cause water to overwhelm the gutter system and cause water issues around the home.

  3. Annual Rainfall

    Different areas of the country receive different amounts of rainfall. Houses in areas with heavy rainfall will require larger gutters.


  1. Downspouts

    An effective gutter system needs enough downspouts to drain the rainwater it collects. Downspouts are available in different sizes. Most residential homes require 3” x 4” downspouts. Older houses usually have 2” x 3” downspouts.

  2. Gutter Protection

    Sometimes gutters overflow not because of improper sizing but because debris accumulates in them. If this is the case for your home, consider installing Gutter Helmet, America’s #1 Gutter Protection since 1981.