What a micro-mesh gutter guard is
A micro-mesh guard stretches a very fine woven screen across the top of the gutter. The screen is usually stainless steel, and it sits in an aluminum or plastic frame that slides under the shingles or fastens to the gutter lip. The idea is simple: the openings are so small that almost nothing but water gets through.
That fine weave is the strength and the weak spot. It stops large debris well, but everything small lands right on the screen: pollen, oak tassels, roof grit and the fine sand that blows around coastal and inland Florida neighborhoods. When that material packs into the weave, water has to work harder to get through, and the screen needs brushing.
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