6mm tile backer board - which side should I tile?

[GaryM]

It's spruce ply, not WBP ply.

Unless you can suggest a product for sealing before tiling so I don't need to use a backer board?

 

[Scott]

I see, i assumed WBP or marine. But no i cant sorry!

 

[GaryM]

How would a tanking kit work with ply?

Would it adhere it it OK?

 

[The Legend; Phil Hobson RIP]

Good banter lads, keep it up

 

[DHTiling]

How would a tanking kit work with ply?

Would it adhere it it OK?

That depends upon the ply.. some cheepo stuff then probs not..