Tiling over tiles

[jay]

if the blocks are solid with no cracks and true then yes that would be fine is this a shower wall

 

[Dave Ramsden]

100% no worries, nothing falling off

Rip it off and start again my friend

 

[jwatson]

if its not flat enough you could dot and dab plaster board onto wall.
DONT skim the plaster board. The board themself will hold more weight than with a scim on it 32kg m2 inc adhesive and grout.( work out the weight per m2 ) for a more secure way use a tile backing board they have far superiour weight load m2.

A common question, how much weight can my wall support, here are the recommended max weight ratings in KG / m2

Plaster Skim on Plaster Board........20KG
Skim and Set Plaster...................28KG
Plaster Board.............................32KG
Sand and Cement.......................40KG
Cement Backer Board..................55KG
Hardibacker Board.......................45KG
Lightweight Tile Backer Board........40KG
Glass Reinforced Cement Sheet.....50KG
Gypsum Fibre Board.....................40KG

Remember to factor in the weight of the tile / m2 AND adhesive and grout
(Some adhesives are manufactured as lighter products).
Grout.........2KG / m2
Adhesive....4KG / m2

grout weight will also depend on how large the tiles are that you are using and the thickness eg a tiled area that uses 300mm tiles will have more grout than an area with 600mm.

 

[cyclonebri1]

if the blocks are solid with no cracks and true then yes that would be fine is this a shower wall

part of it is, shower over bath

 

[cyclonebri1]

100% no worries, nothing falling off

Rip it off and start again my friend

Read again Dave, decision already made,

 

[cyclonebri1]

if its not flat enough you could dot and dab plaster board onto wall.
DONT skim the plaster board. The board themself will hold more weight than with a scim on it 32kg m2 inc adhesive and grout.( work out the weight per m2 ) for a more secure way use a tile backing board they have far superiour weight load m2.

A common question, how much weight can my wall support, here are the recommended max weight ratings in KG / m2

Plaster Skim on Plaster Board........20KG
Skim and Set Plaster...................28KG
Plaster Board.............................32KG
Sand and Cement.......................40KG
Cement Backer Board..................55KG
Hardibacker Board.......................45KG
Lightweight Tile Backer Board........40KG
Glass Reinforced Cement Sheet.....50KG
Gypsum Fibre Board.....................40KG

Remember to factor in the weight of the tile / m2 AND adhesive and grout
(Some adhesives are manufactured as lighter products).
Grout.........2KG / m2
Adhesive....4KG / m2

grout weight will also depend on how large the tiles are that you are using and the thickness eg a tiled area that uses 300mm tiles will have more grout than an area with 600mm.

Ah, excellant info. Tiles are 23kg per 1.1sq mtr so sand cement render would be better for me. If I did use a form of backer board what would be the fixing method, and what adhesive for large porcelain tiles?

 

[jwatson]

for backer board you could use dry lining adhesive it is strong stuff. or mechanicaly fix them to wall (plug and screw every 300mm2).
the adhesive is just what best you can get in your area (make sure its powder.) the sponser for the forum i think is mapei and they are a very respected adhesive amongst pro's. if you have one near you go into tile giant (sponser of this site) they are always realy helpful and will sort you out.
mapei keraflex is a good one. Tile giant stock mapei products.

 

[jay]

part of it is, shower over bath

might be worth looking at some sort of waterproofing then