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Title: Do your homework!!
Review: ***If you cannot get them under the bottom layer of shingles DO NOT BUY THESE!!***I bought a bunch of these and installed them, with some difficulty.We have an older house with multiple layers of shingles and they wouldn't go under the bottom layer. So when it rained, the water would come off the roof and hit the edge of the guards and skip over the gutter. I'll put up with cleaning my gutters periodically.
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