Top edge of tile over tile finishing

[ChrisM]

This was a genuine DIY question, so sarcasm aside, thank you for your answers everyone.

 

[grumpygrouter]

The answer you recieved from Dave and Brian C were serious responses. There are potential problems with tiling over tiles. You do not know how well they are fixed to the wall, and depending on the tiles you wish to fix over the top, there is potential to pull the wall down with the extra weight you are adding to it.

It is quite quick to pull of the old board and reboord then tile. To tile over the top may save a small amount of time but it is also more difficult to get a good finish. Are the current tiles level for instance? You will also need to use a cement based (powder) adhesive and then you have the issue which was the point of your question, about the finish on the top.

Starting again really is the best solution.

 

[ChrisM]

The existing tiles are on solid brick and plastered walls, so weight wasn't my main concern. I take the point that I may not gain in the long run so will remove the old tiles and replaster if needed. Thanks to all for the advice.

 

[grumpygrouter]

The existing tiles are on solid brick and plastered walls, so weight wasn't my main concern. I take the point that I may not gain in the long run so will remove the old tiles and replaster if needed. Thanks to all for the advice.

Chris, the fact that you are tiling onto plaster IS a concern. Plaster will hold less weight than any other normal substrate used for tiling at only 20kg/m2 and that includes the weight of the adhesive and grout. Unless you have very thin ceramic tiles on there already, you will be approaching that weight. Anything more substantial put on the top could be cause for serious concern.

If you take the tiles off, remove the plaster as well and then dot n dab plasterboard onto the brickwork. This will give you a much better surface to tile onto, you won't need to wait for it to dry (replastering can mean a wait of up to a month!) and it will support 32kg/m2 - DO NOT SKIM THE PLASTERBOARD!

Hope this helps.

 

[bigandy]

We may seem sarcastic sometimes but it's all said in the best intentions.The lads have given you spot on advise.

 

[JRingo]

Schluter Systems makes a retro fit edge protector called ECK-K. Sold thru Home Depot. Also brushed aluminum angle can be hot glued in place.