How to Cut Cleanly with a Utility Knife
Whenever you are cutting through carpeting, vinyl flooring or even roofing paper, your blade will probably become dull much faster than you might expect. That's because the surface underneath can be really hard, sometimes even concrete. It is well worth your time and energy to stop every few minutes and change the blade. It only takes a second and you'll end up with a job that looks much better and goes a lot easier.
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