Capillary action is a water activity in which water adheres to a surface and follow the surface.
Water behind gutters drip edge.
Once the apron s in place fasten it with sheet metal screws.
For example most ranch style homes have a 3 12 or 4 12 pitch roof.
A gutter apron is similar to a drip edge in that it fits under the shingles and protects the roof deck.
Using a drip edge will only solve part of the problem because water will continue to run down the side of the house behind the gutters.
When the roof shingles do not extend past the metal drip edge the water will suck back on the metal drip edge this is called capillary action and run behind your gutters.
This can be frustrating and also creates a dangerous situation on porch steps during freez.
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Therefore when the water goes over the edge of your roof it will stay attracted to the surface of the drip edge and run behind the gutter.
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Have rain water dripping out from between your facia and gutters.
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