Sealing new plaster

[GB_Groundworks]

i should add hes 6'4" 14 stone basketball player and boxer haha

[lutonlagerlout]

old mick o'brien must be raking it in on the motorway
he has that sing song kerry way of talking that is hard to follow
but once you are supplying plant to the DOT for a 4 year contract all your xmases have come at once
LLL

[GB_Groundworks]

Think I must have seen over a 100 bits of this kit some of it looking brand new must have bought them on the strength of that contract. It's Carrillion the main contractor on it

[lutonlagerlout]

i was in his yard 7 years ago giles and he had untold plant then,i think the reason they use him is that he has so much kit and drivers
it would drive me nuts working on it,i know lads who are getting £10 an hour labouring 10 hr shifts 7 days a week but not my cuppa tea
In 1984 me and my mate went to JCT 10 for the start it was big money then £48 for a 12 hr day 7 days a week,not bad when beer was £1 a pint!
LLL

[henpecked]

old mick o'brien must be raking it in on the motorway
he has that sing song kerry way of talking that is hard to follow
but once you are supplying plant to the DOT for a 4 year contract all your xmases have come at once
LLL

Is that the Leamington O'Briens, LL?

Hp

[pcdoc]

The sizing of freshly plastered walls is done to control the suction. Without this, the new paint will dry too quickly, preventing proper polymerization of the binder (resin/varnish content). This will cause cracking and flakin.g in the future- no matter how many coats you add on top. It can also cause 'piling' of pigment and resin sludge on the rollers and bits of the roller sticking to the wall.

PVA is not the best way to do it. As stated by previous posts, the best way is to put a coat of watered down emulsion. If it is fully plastered (new bonding coat and finising coat, use 80% cheap paint, 20% water. If it is just a thin skim of finishing plaster, 10% water is fine.

Cheap paint still needs watered down- even though the pigment content is lower, it should still (hopefully) have been formulated with drying rate tested (its a huge factor in paint formulation). Remember- paint doesnt just dry- it sets chemically which it cannot do properly without water.

On a side note- when plastering, if the plaster is given a final dry polish with the trowel (coupla hours after final wet polish), theoretically, sizing is not necessary- but who wants to chance that?

Bet thats more than you cared to know about it! I worked for 12 years in a lab for a pigment manufacturer (paints, inks, plastics and cement sometimes I even bore myself!

-Michael.

[lutonlagerlout]

do you drink alone much michael?

i have a mate steve who does the exact same type of job, he never tires of explaining how they dye foodstuffs

and TBH i find it quite interesting

LLL

[pcdoc]

LOL- Ive not done the job for a few years- took my voluntary dunny money and went self employed. The company was CIBA, there are a few sites down south, certainly at least one that deals with dyes.

We were strictly pigments only. Dyes dissolve, Pigments are insoluble, instead they are ground and dispersed- never dissolved.

It still bugs me when people use the term cement 'dyes' (even the manufacturers) when in fact they are cement pigments. But its one of those anorak moments where I have learned to bite my tongue.

Still- yet another british manufacturing industry in very steep decline. Glad I got out when I did.

-Michael.

[rab1]

you sound like my wee bro going on about concrete dyes (pigments). to really annoy him always use the term Bison flooring to describe hollow core. :p :p

[pcdoc]

Im frustrated that my 3 year old keeps calling screws 'nails'. I seriously need a new labourer- his wheelbarrow capacity is woeful too

Another couple that seem to get peoples backs up on this forum...

-Calling 22mm tiles - "slabs"
-Referring to concrete as "cement"

Had a labourer that kept calling the manual Tamper the "Tamperer" (bit worrying).

And lastly, a mate talking about an annoyance said he'd had enough and it was "time to nip this thing in the butt!"

-Michael.

[lutonlagerlout]

i think theres a bit of OCD about most of us on this forum
on site concret is called crete,mortar is muck, tamperer is a ryanair destination in finland :;):
I dont consider anything under 38mm a slab
LLL

[Bob_A]

mmmmm I can see this thread going way of course
Isn't a slab a layer of concrete on the ground, a flag is a union jack and isn't a spade and a shovel the same thing?
Why do people call chimneys chimineys?
What's the difference between a road and a street and does it really matter?

[flowjoe]

Surely you mean the Union Flag Bob ??? and lets call a spade a spade



Edited By flowjoe on 1283537124

[seanandruby]

Concrete is 6 metres of excitement, mortar is compo, a shovel is many things IE...banjo, 1RB etc: :laugh:

[henpecked]

mortar is compo

Aka 'Gobbo', ready spread, muck, but usually compo. Never knew where that came from ? ???

Hp