priming plasterboard?

[johnryan]

hello all, just doing a method statement, and while attaching data sheets on addys' etc, i noticed this on the weber eco plus data sheet;

Wallboards: fibre/cement,
plasterboard, plywood
Ensure boards are rigidly supported, clean,
dry and free from dust. Plasterboard should

be thoroughly primed with
weber PR360
until surface stops absorbing

now i always thought that plasterboard isn't primed but for some reason this particular addy does need to be primed. unfortunately i've used this a couple of times on jobs and haven't primed the boards first. should i be worried? anyone know why plasterboard should be primed in this particular instance? got caught out on this and hoping for some reassurance that i dont have a disaster waiting to happen on my hands. cheers.

john

 

[Gazzer]

Not often I prime plasterboard, just bare edges .

 

[johnryan]

i dont prime plasterboard either normally, but for some reason they spec priming with this particular addy. just wondering if anyone knew why they would. it's the only data sheet i've seen where they recommend doing this.

 

[Gazzer]

I suppose you can only go with what they say to stay on the right side ?

 

[AliGage]

I must admit I've always primed standard plasterboard so as no moisture in the addy is soaked in.
Seems to be one of those either or questions. Any reason as to why you don't prime guys?
I suppose with cement based adhesive it'd be ok. But would the paper lining absorb too much moisture if you used a tubbed adhesive and could this potentially cause a problem?

 

[johnryan]

as with sir ramic i guess i'll go with the data sheet but just a bit worried about the couple of jobs i've already done using this addy without priming.
as far as ali said i always thought that p.board didn't need to be primed as most addy data sheets don't say it needs to be. as far as tubbed goes, i very rarely use it anymore, and normally if i do it would only be in kitchens or when i turn up for site work and that's what's been provided. however it does sound like a good idea to prime plasterboard with tubbed and i may start to do that on the odd occasion i do use it.

 

[Perry]

there is no need to prime in the past with cement adhesive but can help sometimes if you need a little more time to adjust things but adhesive companys love to sell more gear lol but i have never used this adhesive before would like to know why

 

[charlie1]

I use webber every day, mostly on new plasterboard and know exactly why it needs primed. If you don't, it drastically reduces the bond strength. Always prime new plasterboard with pr360 ...trust me!

 

[johnryan]

i have never used this adhesive before would like to know why

me too, was hoping someone here may have an idea. it's a very nice adhesive too, and i plan on using it more in the future. it's on special at ctd next week for 8 quid a bag too.