Tiling over large mirror

[jwatson]

not started that job i was talking to you about. concrete sub needs a few more weeks to cure. will get you some good pics when i have finished it.
are you in kingcraig next week?

 

[jwatson]

The mirror has a backing that provides the mirror finish and that is all that is holding that in place, IMO you should not tile over it..

The weight of the new tiles will deffo exceed to weight for that substrate.. if you tile over then that is your choice but not one that i can recommend

cheers for that info dave, never tiled ontop of a mirror before and wont now. so simple when you think of the backing finish it has.

 

[PeterSandhurst]

This afternoon, after reading the 'mirror backing substrate' reply, I ran a test on a piece of 15in square mirror and secured it to a plank using silicon mastic and slung it from the underside of an RJS in my garage. I then secured another board (laminate) to the other face (glazed side) using silicon mastic again and screwed three eyehooks into the laminate. I then hung 46kgs of Pavia blocks from each eyelet in builders buckets giving a total strain of roughly 140kgs on the backing and it is still hanging there now 4 hours later. The messy job didn't cover all the backing so the figures above are understated amd better than shown but you get the idea.

Not sure what that comes to in per square meter calculations but it sure as hell gives me the confidence to tile over the big beasty mirror in the bathroom as the tile weights are a very small fraction of that.

If I do, and it fails, I will be back to share. Otherwise, assume I did OK and thanks to all for their input, much appreciated.

Best

Peter

PS - Selling strong 15" square mirror, slightly used /marked

 

[kilty55]

all the best with your job peter

 

[widler]

i don't think your problem wil be the mirror holding on the wall,the problem will be the weight issue with your slurry sticking to the very shiny surface of the mirror,the adhesive on the slurry and the tiles on top of that.thats some weight,onto a very shiny surface

 

[tommyzooom]

If you are happy with weights etc, there are proprietary primers for tiling over glazed,impervious surfaces, like PCI primer 303,Benfer Starprim etc. I would be more confident with these than a slurry coat