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I also cut cement board for under tile with these. I use these extensively in renovations of older homes with plaster walls. They make a nice clean cut through plaster and lathe, and last a long time. I usually break the blades before the teeth wear out on these. A typical blade will only cut about 18" before the teeth are gone.
These blades are amazing. After going through dozens of jigsaw blades made for wood and/or metal, I finally bought a set of these. Why did I wait so long. They cut through fiber cement siding like a hot knife through soft butter and didn't dull out like wood or metal blades do.Buy these if you're gonna be cutting fiber cement. Arggghhhhh.
These blades work great. Great product. Don't know why they sell a 2 pack as one can easily do a house with one. I suppose you never know you might break one, but I don't see them wearing out quickly.
Blades worked great for siding project. One package enough for 2200 square feet of siding and Hardie trim boards on facia and corners.
the playing field narrows even more. In this case the right tool for the job are these jigsaw blades. I can't think of a better tool for the job, and these should be a considered a requirement for any project that involves putting fiber cement around anything. When it comes to working with fiber cement, there just aren't a lot of options for cutting this material. They're fast, clean and durable.
And when it's time to cut arcs or notches around windows, doors, etc. So what are your choices. I suppose you could use some combination of fiber cement shears or circular saw blades, but this could be tedious and leave some ugly overcuts in the piece. Using a handsaw might be OK too, but if you have to make long cuts around big windows that could get tiresome quickly.
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