Thick extruded products can t do this and often angle the shingle away from the subroof.
Gutter guards not under shingles.
Most owners of shingle roofs are aware that screwing down gutter guards under the shingles is not a feasible option.
Some homeowners think it is necessary to nail the gutter guard into either on top of or just beneath the roof s shingles.
Gutter guards can be an effective part of any rain gutter system as they work to filter out debris leaves and shingle grit preventing clogs and protecting your home from damages.
We ve never seen it.
This will create damage on your roof shingles and therefore the shingles will no longer do their job at protecting your home properly from the intrusion of water.
A gutter guard that traps debris is a bigger problem to a roof since the debris can wick water up the shingles where it can cause problems.
After all if a contractor is selling a gutter guard that cannot install under the shingles then their best tactic is to scare homeowners by telling them that installing gutter guards under their shingles will void their shingle warranty.
Because shingle roofs are so beautiful and distinctive gutter guards that have to be placed under the 2nd or 3rd row of shingles will interfere with the classic appearance of heritage roofing.
A voided warranty that is.
When water sits on a shingle like its doing here it can work its way under the shingles at every seam.
And logically it doesn t make sense.