We ve never seen it.
Gutter guards not under shingles.
If you plan on installing gutter guards on your own there are a number of different considerations you need to be aware of.
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.
Thick extruded products can t do this and often angle the shingle away from the subroof.
Some homeowners think it is necessary to nail the gutter guard into either on top of or just beneath the roof s shingles.
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.
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.
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.
Most owners of shingle roofs are aware that screwing down gutter guards under the shingles is not a feasible option.
A voided warranty that is.
And logically it doesn t make sense.
The part of mastershield that slips up under the shingles should not cause the shingles to bend or change how they currently lay on your roof i e the back fin of mastershield should stay on the same plane as the sub roof.