Slabs have lifted!!

[Gazmel69]

Please help!!
I'm not the most DIY minded of people (I'm actually hopeless at it), but was really pleased when I managed to lay a patio. However, I haven't managed to grout it yet and some of the slabs have lifted. What is the best thing to stick them back down? My neighbour gave me some pva stuff but it didn't work (maybe because it rained on the night of use?)!! Any suggestions as to what I can do would be most welcome!!

Thanks

Gareth

[Carberry]

How has it lifted? Were the slabs rocking or did you walk around and try to pick them up off the patio?

SBR mixed with cement 1:1 ratio and apply it to slab with a brush and you won't be able to lift it again.

If the slabs were rocking then they will need relaid, pull them up, remove the bedding layer and relay.

[local patios and driveway]

Get a cheap 10" grinder from screwfix. Remove any loose slabs, then you will need to cut around the area the slab was. And chip it all out at least an inch in depth. Mix a 4-1 shard/grit sand and cement mix. Make it quite dry. Next make a slurry 50-50 water and cement, then add a glug of pva (in the south) or sbr (in the north). Lay the dryish mix in to the square you just cut out, compact it down a little with your trowel and lay the slab on it, check it is nice and level and the correct height, adjust as you need to. When happy pour your slurry on top of the dryish mix. No need to pour loads but just enough poured around the cover the area. Place slab back on top and tap down with rubber hammer.

Job done, move on to the next one.

Dont drink the slurry, it will burn.

[Noony]

we have pva north of watford too!!!! dont use it tho, sbr is the way to go.

[lutonlagerlout]

sbr for me
like a blanket as they say
LLL

[DNgroundworks]

pva and sbr are completely different things, sbr everytime for me, only ever used pva to bond interior walls when plastering.

[local patios and driveway]

Im under the impression northerners dont use pva as its not frost proof. Like they dont use lightbulbs due to a lack of electrickery

[lutonlagerlout]

"ey oop daniel,look at metal bird oop yonder in t' sky!!! :;):
I know a polish fellapiot and some of his work mates asked him do they have cash machines in poland?
he was like "wtf?"
I only found SBR through this site and it is so superior to pva i would never use pva again
LLL

[local patios and driveway]

Rarely sold round here, im always asking for it buildbase etc never have it

[Noony]

theres different grades of it, which explains the price differences with different brands i imagine. but not always!!

pretty much everywhere stock it round us now.

[lutonlagerlout]

its normally on the shelf next to pva and fed dan
the cementone one is around £15
once you have used it on steps or copings you will never use pva again
LLL

[local patios and driveway]

Will give it a go.

[lutonlagerlout]

dont get it on your hands
it really sticks
LLL