Priming

[strongboes]

Ok so I have noticed that everyone on here seems to prime everything and anything!

Why do you prime?


I'll say now that I very very rarely prime anything. IMO it is a waste of time the majority of the time.

I once did a job and the customer had primed a screed floor with a primer. First day I go there, set up and do 20ms/q which I was very happy with, I go back the next day and the plumber needed to run a bloody pipe right through one room, don't ask me why. So anyway I agreed to pull a few tiles up for him, they came up with no effort at all, the primer was stuck to the adhesive but not the screed. It was as if i had been tiling on dust. So the whole job had to be started again and the remaining primer pulled up.

IMO there is no stronger bond than cement to cement, a primer is just a weak bond which will IMO fail. So for this reason I never prime.

How about you?

 

[grumpygrouter]

I prime if it is a cement adhesive onto plaster - or if the adhesive I am using recommends it for the substrate I am tiling onto.


Grumpy

 

[bearwithme]

interesting, i thought all substrates had to be primed. just when i thought i was beginning to get a handle on things.!! lol :lol:

 

[GazLC81]

I always prime for peace of mind! I know then that I am doing everything I should be.

Most important to prime cement floors and new plaster, doesn't take long either!

I would reccommend to all newbies to prime as well, saves worring about it then as I did once or twice!

Gaz

 

[sWe]

I always stick to product guidelines, for peace of mind and insurance reasons

(Edit: That means I almost always prime)

I once did a job and the customer had primed a screed floor with a primer. First day I go there, set up and do 20ms/q which I was very happy with, I go back the next day and the plumber needed to run a bloody pipe right through one room, don't ask me why. So anyway I agreed to pull a few tiles up for him, they came up with no effort at all, the primer was stuck to the adhesive but not the screed. It was as if i had been tiling on dust. So the whole job had to be started again and the remaining primer pulled up.

The primer was stuck on the adhesive but not the floor? Perhaps the customer used the wrong kind of primer, or didn't dilute it proberly, or didn't sweep the floor properly before application, or the screed was fubar. I'm quite sure something must've been wrong for that to happen. In fact, not long ago, I had something similar happen on some plasterboard. It was a case of "cheap arse builder buying a batch of real old materials". The primer I had been given to use was way beyond it's "use-before"-date. I might as well have used butter instead of primer. I thought it looked a bit strange when the primer didn't really "bite" onto the plasterboard. Should've known...

 

[GazTech]

I prime everything if it dosn't move....mainly to stop contaminents bleeding through to grout lines where priming walls isn't needed.

 

[Fekin]

I prime everything if it dosn't move.

That's me getting a coat of primer then :lol:

 

[howard]

i only prime because everybody on this website advises to but you will never know what effect it has because you cant see the effect wheres the stats on this subject ? it will be interesting to see them

 

[tysfoot]

i use bal primer. what do you guys use

 

[Ric]

primer is supposed to seep into the substrate to stop the substrate sucking the moisture out of the addy and therefore making it set too quick!

 

[GazTech]

Ok so I have noticed that everyone on here seems to prime everything and anything!

Why do you prime?


I'll say now that I very very rarely prime anything. IMO it is a waste of time the majority of the time.

I once did a job and the customer had primed a screed floor with a primer. First day I go there, set up and do 20ms/q which I was very happy with, I go back the next day and the plumber needed to run a bloody pipe right through one room, don't ask me why. So anyway I agreed to pull a few tiles up for him, they came up with no effort at all, the primer was stuck to the adhesive but not the screed. It was as if i had been tiling on dust. So the whole job had to be started again and the remaining primer pulled up.

IMO there is no stronger bond than cement to cement, a primer is just a weak bond which will IMO fail. So for this reason I never prime.

How about you?

Which primer did you use ?

 

[strongboes]

I didn't use any, the customer used one the builder supplied. I think it was a yellow 5 litre tub, brand everbuild. I dont know what it was I was too pi***d off to care at the time.

 

[GazTech]

I didn't use any, the customer used one the builder supplied. I think it was a yellow 5 litre tub, brand everbuild. I dont know what it was I was too pi***d off to care at the time.

Ouch...if ever in doubt, tell the customer you are not happy with the product and supply your own....Gaz