bathroom job advice

[cam_low]

A while back I asked a question about the weight issue. Now I told the customer to change their tiles as they were sold porcelain 25kg/m2 tiles which were to be fixed onto a skim over blocks.

It has come back to haunt me with the cusomter now saying they want to keep the tiles...

So where do I go from here, Yorkshire tiles have recommended fixing hardi backer boards.
How would I fix these to the walls ? Would I have to remove the skim?
Any other issues ?

I have advised to reboard the whole room as the tiles are only going one metre.
Should the hardi boards be fitted over the skim and the tiles are then fixed there will be a sizable ledge and imo leaving the finish crap.

Could I tile straight onto what is presumably breeze blocks after priming ?

grrrr what a life

thanks people.

 

[actiling]

hi boosha,
if your going to take the skim off back to the block then you dont have to board the room out.when the skim is off,prime the area and let it dry.use a powder based flexible cement adhesive (pci is good)for the tiling.with a flat trowel bring a tight coat of adhesive onto the blocks and let it dry.tile from the bottom upwards, butter the wall and the back of the tile and let every second course dry out.i am fixing 12mm 80x40 porcelain lengthways on a job now and i stick two courses a day,looks really nice.
i have used this method for fixing heavy tiles for about 12 years and have had no problems with it.
seasonal greetings
chris.

 

[doug boardley]

Boosha, what base coat is under the skim, is it sand and cement or a gypsum base coat (ie browning, bonding). my way of dealing with this situation would be to strip all the skim below your 1 metre datum and if its sand and cement base coat you're ok for weight issues

 

[cam_low]

As the house is quite old, what should I do if there is natural stone block work below the plaster skim and not the usual breeze blocks.

 

[shane176]

i would go with ACTiling on this one geez!

 

[cam_low]

just found out that behind the plaster are red brick walls.

 

[doug boardley]

but what's between the red brick and the final plaster (skim) coat, is it sand and cement? it can't be skim straight onto red brick!:dizzy2:

 

[White Room]

Probably a standard london brick, All quality bricks were used on the external front of the house

 

[doug boardley]

Probably a standard london brick, All quality bricks were used on the external front of the house

was wondering what base coat whitebeam, and could skim coat be removed to tile onto,hopefully, sand and cement:ninja:

 

[cam_low]

well im going round to the job in the morning hopefully to take off the skim and hoping that there is a sand cement base coat. He said he got the screwdriver through it no bother to around 5/8 of an inch.

 

[White Room]

Sounds like gypsum, Would've struggled with sand/cement unless it's a really weak mix