Uneven wall questions

[Graham Bright]

Morning,

Been a while since I posted and had a couple of questions please. I have trawled through a fair few older forums before asking the following so apologies if I am repeating old news.

I have got a bathroom where the customer wants 600x300 tiles with a mosaic border half height. 3 of the 4 walls are good (plastered on plasterboard) They run pretty flat with a few variations of a mm or 2 over a meter. These have been fine so far and I have hidden any slight bumps and dives with the addy (using 10mm trowel)

The last wall is doing my head in massively. If you put a straight edge on it, it runs flat for about a meter then dives in by almost 25mm, then comes back out after a couple of foot. Then right in the middle it has a bowl shape (comes out) that runs for another 2 feet. You can rock the straight edge on it by 20mm either side.

Now if it just had the diving in part I would have thought about levelling it myself with something but considering it bows out after that I am at a loss. I have already tiled the other 3 walls in my naivety.

What do you guys suggest please and I have learned my lesson about checking every part of every wall at quote stage.

My second question is regarding putting 600 x 300 vitrfied 9mm thick fllor tiles on a newly plastered wall ,2 months )Havent done this but have been asked) The tiles with addy on weigh right on the boundry of maximum which from memory is about 20-25 per M/2 please correct me if I am wrong.

Id putting floor tiles on a plastered wall advisable and is there any pitfalls I should look out for please.

Cheers guys

 

[aqua blue]

Hi Viaticus, You have learnt one of the most important things. Survey walls and flooring carefully when quoting.

The other one is weights.

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

Remeber to factor in the weight of the tile / m2 AND adhesive and grout

Grout.........2KG / m2
Adhesive....4KG / m2
__________________

Thanks Oli.

 

[Stephen@Weber]

Blimey you're on the ball aqua blue although I thought 2 coat plaster was only 20kg?

 

[aqua blue]

We are all here to endlessly learn from each others mistakes and victory's.

 

[DHTiling]

Hi Viaticus, You have learnt one of the most important things. Survey walls and flooring carefully when quoting.

The other one is weights.

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

Remeber to factor in the weight of the tile / m2 AND adhesive and grout

Grout.........2KG / m2
Adhesive....4KG / m2
__________________

Thanks Oli.

I think your Grout and adhesive weights are too much.. about half that is ample to allow.

 

[wivers]

All very well quoting weights and stuff but no-one answered his question.

You could try chasing the lump out of the wall mate leaving you wiv only the belly to deal with, sounds like you've got the packing out bit nailed down.

Sory is it a solid plasterd wall or more PB skimmed.

 

[aqua blue]

Plaster Board.............................32KG

 

[Graham Bright]

Its an internal stud wall so Plasterboard with a skim on.

 

[Graham Bright]

Hi Viaticus, You have learnt one of the most important things. Survey walls and flooring carefully when quoting.

The other one is weights.

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

Remeber to factor in the weight of the tile / m2 AND adhesive and grout

Grout.........2KG / m2
Adhesive....4KG / m2
__________________

Thanks Oli.

Thanks for the info mate, very useful.

 

[Graham Bright]

I dont think I could chase out beacuse that much difference would eat away the 5-10mm skim and be digging holes in the plasterboard.

I am guessing my best option is to take that wall back down and re plasterboard it and tiles straight on that. Or get a decent spread in to make the wall good.

Would you guys agree?

 

[mikethetile]

the easist way to straighten that up is to strip the plasterboard off. fix studs alongside the existing studs to level up and reboard

 

[White Room]

Replace with new plasterboard would be my option

 

[Sean fsy]

are you putting them on brick bond, That doesnt help matters:mad2:

 

[Graham Bright]

Thanks guys, much appreciated as always.

No Sean LOL, just straight bond with half height border. Still, with tiles that size you notice every single thing in the wall. Its been a struggle, but looking ok now. Just this last wall to sort out. So pleased its not Brickbond though mate

 

[Graham Bright]

the easist way to straighten that up is to strip the plasterboard off. fix studs alongside the existing studs to level up and reboard

Cheers mate,

Are you saying that its the studs that are more likely to be bowed and out of shape rather than the shape of the plasterboard and skim themselves??