Dot Dab

[brian c]

Good to see you backtracking big man...lol

 

[TJ Smiler]

Not sure what i'm doing tonight Bri... never mind back tracking i think i need my backtrack examined lol

It's this caravan!!!! i can't take the silence, it's like being in a bloody cell!!

TJ

 

[jay]

hi all heres a thought tilers need 95% coverage of adhesive .plasterboard can be dot and dab .that makes sense:8:

 

[Spud]

hi all heres a thought tilers need 95% coverage of adhesive .plasterboard can be dot and dab .that makes sense:8:

i have wondered about this for quite some time , plaster board is fixed with dry wall adhesive spotted on the back and banged back flat with a straight edge does this mean that the dry wall adhesive (GYPSUM BASED) has a greater bond strengh, loadbearing and shear strength than tile adhesive (CEMENT BASED)? will one of the adhesive technical guys please explain as the front of the plaster board we are lead to believe holds 32kgs per sq m which has to be solid bed which spreads the load but the back of the plaster board can take all the weight on a point load with gypsum based adhesive ?

 

[jay]

this could be interesting :8:

 

[Alan.P]

Very

 

[jay]

even on stud walls they use stab (adhesive):and few nails or screws :20:

 

[TJ Smiler]

Nothing in tiling actually makes any sense, it's just one big contradiction that is set just to get us worried that we are doing everything wrong lol. I have often dot and dabed plasterboard with rapid set flexible thinking that the bond strength of a cement based powder with all the added sticky polymer things is much better than Gypsom.

Wouldn't the same thing apply to hardibacker board too, cos that can be dot?dab all over the floor but the tile has to have 100% coverage.

Also short having a glass floor that you could walk under and have a look at the surface you have just tiled, nobody and i mean nobody can really be sure that they have achieved 100% coverage.

This thread could get really interesting

TJ

 

[basshunter]

i think we all know why!

 

[TJ Smiler]

Why mate, sorry but maybe the obvious has eluded me :smilewinkgrin:

TJ

 

[basshunter]

Think of it from the adhesive manufacturers perspective :builder2:

 

[andy-p]

you need a solid bed of adhesive on floor tiles for obvious reasons ,it probably doesnt need to be 100% but near enough and its easy to acheive even on large formats , get yourself a 20mm trowel for a kick off...

 

[White Room]

I have never dot and dabbed plasterboard with anything other than dry wall adhesive, the thing to remember is the dab of adhesive are peaked when put on with a trowel and the board is pushed back to the wall and is spread out on the rear of the board covering a lot of area but a 10mm gap must remain behind the board any thinner could weaken the adhesive for which it was designed for. Tile adhesive is normally a bed of about 3-6mm bed, so unless your using, say a thick bed adhesive, could the standard addy fail to excesive depth for which it was'nt designed for, just my humble opinion

 

[jay]

any plasters out there if walls are to be tiled (pb on studs ) shouldnt the screws be every 200mm on studs (as the case down here ):8:

 

[White Room]

To be honest any plasterboard wether dot and dabbing or fixing onto stud work and having any weight applied to the surface of board should have extra fixings