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This greatly depends on the type tile you have. If it is a manmade tile such as porcelain, or ceramic, then you don't have to worry about sealing it. Most natural stone tiles, especially softer or water permeable stone such as marble, limestone/travertine, and slate should be sealed as well. This would ideally be done prior to grouting to prevent the stone ...


Cover wood sill with red guard or equivalent. Install concrete board over sill; going through the trouble of getting it to slope slightly towards shower by building up mortar under it is not a bad idea. Do not red guard the cement board so the thinset has a good rough surface to adhere to. Install tile sloped towards shower by building up thinset on back ...


Use your subway tiles, just use two instead of one. Cut them so you split the difference on the width so they are the same size, rather than using a full tile and a cut strip.


First, make sure the rough sill slopes toward the shower. Measure it with a level; if it's not appropriately sloped, build it up with more mortar to create the requisite slope. Then, once you've painted all that cementboard with RedGard, the whole assembly should already be waterproof. Just tile over RedGard on the sill however you like. Any water that gets ...

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