What to do with this gap between drywall and windowsill

Goldglv

I am tiling a mosaic backsplash in my kitchen and I thought it would look nicer if I removed the trim under the window so I could tile right up against the bottom of the windowsill.

I wasn't expecting this gap between the bottom of the windowsill and drywall. It's about 1/4". Any ideas on what to do with it? I was thinking of putting some corner round to cover the gap but I wasn't sure how that would look on the wall.

Thanks for any suggestions.....

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joecaption

Not sure why your worryed about it if your going over the area with tile. Just tile it, apply your grout, but do not grout under that stool, once the grout drys apply color matching caulking under the stool.
Do not grout it, it's just going to crack.

Goldglv

The gap is roughly 1/4", the mosaic tiles I'm installing are on 12x12 inch sheets. Each individual tile is only 1/2"x1/2". So only half of the tile on the top row would have any type of support behind it.

There's a lot of rough use in my house and I know eventually that top row is going to crack somehow. If I was using something like 3"x3" tiles I would have no problem tiling over that gap but these tiles are only 1/2".

Any ideas?

mae-ling

if you want it tighter you may need to cut out sheetrock and patch it back in, use a drywall J moulding on that edge.

chrisBC

If the gap is about a quarter inch like you say, you could fill it with drywall mud. I'd use a setting type compound (powdered stuff you mix with water) as it is stronger than the ready mix stuff. wipe it fairly smooth as you put it on, because hot mud (the powdered stuff) is harder to sand.

sublime2

Fill the gap with the mastic your using for the tiles.

DannyT

fill with hot mud and leave the tile an 1/8 of an inch away and caulk the gap. the wood will move and grout will crack.

weekendwarrior9

You can probably pick up a small piece of discard pile sheetrock from your local big box for free, or for a really nominal price. Cut back your wall so you have 2 inches or so to work with and pop your sized sheetrock into it, then tile over.

Personally I'd rather do than then work with mudding in the gap, but that's just me.