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The timeline to install countertops largely depends on the materials and the job size. Installing granite countertops takes anywhere from two to seven hours, though complex designs can pass the eight hour mark. Average-sized quartz countertops take two to five hours to install, though most pros will recommend a 24-hour settling period. Marble, on the other hand, is finicky and can take up to two whole days to install. No matter how you slice it, however, a professional is going to complete the job much quicker than an amateur.

Yes, Corian® and other solid surface countertops can be cut with standard woodworking tools like a circular saw or a jigsaw, but using the correct blade is crucial for the best results.

The recommended blade is a tungsten carbide-tipped blade, often called a solid-surface planer or triple chip grind blade. This type of blade is hard enough to cut through the material effectively. For a jigsaw, a fine-tooth down-cutting blade should be used.

It is important to note that a diamond blade is not necessary. Diamond blades are designed for harder materials like natural stone, concrete, or brick, and Corian is not a natural stone.

Using blades designed for wood is not recommended as they can cause microfractures that weaken the countertop's edges. While a tungsten carbide blade provides a much cleaner cut, the resulting edge will still be rough and must be sanded and smoothed to prevent microfractures from developing over time.

The frequency for sealing marble countertops depends on several factors, including the quality and color of the stone, the type of sealant used, and the amount of traffic the surface receives. Marble has a porous surface that requires sealing to maintain its shine and resist scratches. As a general rule, you should seal countertops at least once a year. However, for heavily used surfaces, like those in a busy kitchen or family bathroom, you may need to reseal them every three to six months. Conversely, countertops in a rarely used guest bathroom might only need resealing every few years.

You can occasionally use hydrogen peroxide to remove stains on concrete and granite countertops. Hydrogen peroxide is an oxidizing agent that cleans without bleaching surfaces, which is why it’s so popular as a budget-friendly cleaner. However, it’s still somewhat acidic, so you should use it sparingly on certain countertops.