Do Foam Gutter Filters Work. Foam filters employ the principle of displacement there is nowhere for the debris to go because the gutter is mostly filled with this material. But consumer reports tests find some don t work well. Gutter filters are made of a foam material and are placed inside your existing gutters.
It is designed to allow the pores within the sponge like material to let water pass through to your gutters and down your downspouts. This foam or sponge acts as a trap by intending to filter any large debris out of the water that flows down the gutter.
Instead it features flat bottom foam to absorb the water and allows it to pass through the gutter conversely the upper part of the surface filters and block all the debris.
Sunlight and other natural elements cause the foam to become hard and brittle. And the answer is yes they can be effective but not 100 effective. They are one of several new leaf gutter guard filters on the market see a more comprehensive list of other gutter guards here. Inserts have proven to do a very solid and affordable job of keeping debris out of gutters and are effective with a wide spectrum of debris from needles to leaves.
