Redoing floor after 2 years>Advice needed!!!!

[lukeb]

kitchen is on the ground floor however it will be upper level as house has lower ground floor (2 bedrooms+bathroom)Cracked ceiling is located below kitchen floor (thats whats indicating movement upstairs) also as mentioned Silicon sealant split around skirting boards in places in the kitchen.
and i wish to be a house owner(lol)i am the guy who is tiling it.

 

[kilty55]

granite tops are heavy...was there any extra strengtheneing done in the floor to accomodate this?

just my opinion but on many new builds i have been in the floors are poor and not strong enough imo

a guess is that the floor is as above and granite weight has possibly been too much for it?

 

[jay]

Get hold of a 2 meter straight edge and place it across the crack in the ceiling sounds like the floor cant dandle the weight and has sagged (granit and porc) would find out more before attempting to fix

 

[lukeb]

Hello everyone.Thanks for all the comments.Had a chat witch project manager about investigating the cause of the movement in floor before refitting tiles otherwise I can not guarantee that problem will be solved.Answewr -TILE IT.

So started cleaning the tiles and Ditra is down.Another day of annoying scraping adhesive and grout of the tiles and Saturday fix it.Just wonder how long it going to last this time.
THANKS A LOT FOR ALL ADVICE .

 

[sharpfamily]

Hi.
I am retiling 16m2 of porcelain tiles after whole floor has lifted up.It was originally tiled 2 years ago by contractor chipboard+12mm ply+flexible adhesive.After this winter all the tiles sound hollow underneath.Lifted one up and all of them come up by hands.Tiles can be reused as very clean but adhesive stuck to ply big time.

What will be the best solution, dont really want to scrape the old adhesive as its sound, I was going to smooth it over and than use Schluter Ditra and tile it again.It looks that all fault was caused by floor movement(as ceiling downstairs cracked and all mastic around skirting was ripped.

Is that a good idea?Please help.
Thanks.

all sounds very strange. you say all the tiles come up clean by hand, this sounds like the adhesive hasn't properly adhered to the tiles. could it be just a simple quality problem with the type of adhesive and mixing/applying/laying???

as regards joist shrinkage - are the tiles around the perimeter as loose as those in the center? can you describe the condition of the ceiling - any sign that the plasterboard is bowing down? if the joists have shrunk then the tile floor and the ceiling would have been under compression and forced to lift as an arch.
the reason why the floor has failed definitely needs to be understood before re-tiling, especially as the same problem could occur in the many other bathrooms, kitchens on the site. suggest the developer seeks the advice of a structural engineer as this sounds like a costly problem.
don't think just re-tiling with ditra is the solution......and then still there's the problems with the ceilings.