With surface-tension gutter guards, water clings to the rounded nose of the guard and flows into the gutter
, while leaves and other debris fall off over the edge.
As a result, water flows readily through the foam filter insert, into the gutter
valley and out the downspout to virtually eliminate overflows and the collection of stagnant water that can also attract breeding insects and feeding animals.
The combination of MicroVortex and HydroVortex technologies addresses issues of increasing importance to gutter-concerned homeowners, and results in a 25 percent increase in the volume of water which flows into the gutter and a tenfold increase in ability to self-clean the roof oils that leach from asphalt shingles.
Before Higginbotham, gutter guard gurus taught that a screen with more than 18 threads-per-inch might keep out more debris but would provide inefficient water permeability, causing water to flow on top of the screen rather than down through it and into the gutter.
A diverter will help direct the water back into the gutter
where it belongs.
This approach creates a vacuum, pulling water into the gutter
from practically any direction - including vertically.
The lip on the guards relies on surface tension to draw the water down into the gutter
, while the solid covering deflects leaves and other debris that would otherwise drop in (photo above).
A gutter flashing or drip edge should direct water down into the gutter
so it doesn't dribble backward into the soffit.