Cutting U-notch in Glazed Ceramic Tile

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Old 05-14-17, 05:23 PM
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Cutting U-notch in Glazed Ceramic Tile

I'm trying to cut a U-shaped notch in glazed ceramic tile. I'm using a wet saw to cut the vertical lines of the cut - spaced about 1/4" apart. Then I'm using a dremel to score the horizontal part of the cut. Once scored I use a hammer to knock the vertical strips off. After completing this I noticed that the clay from the unfished part of the tile is somehow showing on the face of the tile just under the horizontal part of the cut I made. The tile has a crackled/glazed finish and the clay shows up in the glaze (almost like veins being filled in with a clay color).

I've used the wet saw to make vertical cuts up to this point and haven't had an issue. Could it be the dremel tool that I'm using to score the tile that is causing this?

Any suggestions on another method of making this cut to prevent this from happening?
 
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Old 05-14-17, 05:49 PM
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I just make multiple cuts with the wet saw to remove the bulk of material then use the side of the blade to remove the rest. I think the Dremel cutting dry may be heating the tile creating some cracking. Try cutting your notch with just the wet saw and see what happens.
 
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Old 05-15-17, 03:15 AM
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I think, too, the Dremel is bouncing more than you think and is chipping the edge of the glaze. I agree with Dane, once you make your vertical cuts, you can break out the fingers gently and use the side of the tile saw blade to run across the arc or flat, whichever you have.
 
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Old 05-15-17, 03:37 AM
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Another option is to use a ceramic drill bit to drill the hole where the U notch terminates and then cut the 2 straight lines.
 
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Old 05-19-17, 03:19 PM
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I tried using the wet saw again for the entire cut, but I'm still having problems with what looks like the clay part of the ceramic tile coming through and showing in the glaze after it is cut.

Could it be the wrong type of blade on the saw? My technique ??
 
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Old 05-19-17, 03:54 PM
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Can you post a picture of this? http://www.doityourself.com/forum/el...your-post.html

It is difficult to understand what you mean by the red showing through the glaze.
 
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Old 05-19-17, 07:12 PM
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Here's a picture showing both the uncut tile and the notched tile with the red clay coming through.

Name:  glazedTile.jpg
Views: 187
Size:  24.8 KB
 
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Old 05-20-17, 03:35 AM
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What does this cut out fit around? Often caulking or molding is all you need to hide the cut.
 
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Old 05-20-17, 03:40 AM
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Why is the glazing crackled? Is it designed that way? This is a seriously odd cut to say the least.
 
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Old 05-20-17, 03:57 AM
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I think the glazing effect of the tile is such that any cutting or notching is setting up extreme stress causing the thin surface glaze to crack. using a diamond hand saw

(https://www.google.com/search?q=diam...a6gKMoWglYsxM:)

will reduce the stress from a motorized tool.
 
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Old 05-20-17, 04:17 AM
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I wonder if the cooling water from the diamond saw is contaminating the cracks in the tile. If it turns out that's the cause I would try a sealing the face of the tile using a sealer intended for porous tile.
 
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Old 05-20-17, 04:48 AM
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Yes the glazing is crackled by design. I'm trying to notch around an outlet. The cut in the picture is not the actual notch, just me messing practicing the notch
 
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Old 05-20-17, 05:10 AM
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Won't the outlet cover hide any imperfections in the cut?
 
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Old 05-20-17, 05:17 AM
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Is it telegraphing the red throughout the piece, or just at the cut edges? Do all the cut pieces, even on edges telegraph the redness?
 
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Old 05-20-17, 08:03 AM
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When I'm cutting the notch it seems to spread throughout most of the piece not just at the cut edges.

When I initially cut pieces for the corners there was no redness on the edge.
 
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Old 05-20-17, 09:26 AM
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I bet the cooling water is contaminating the cracks in the glaze. You can have a helper flood the cut with a garden hose so there is only clean water on the face of the tile or try sealing the tile face before cutting.
 
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