Rendering onto thermalite blocks

[jakejhnsn]

Alryt lads
iv got about 100m2 of external rendering to do, it's approx 2 x 50m drops. It's onto thermalite block were previous failed render has been hacked off!
I am going to put an sbr slurry over it first and was looking for some advice.
would you mesh it aswell?
sbr mix ratio?
do you leave sbr to go dry before scratch coat?
Scratch coat 6-1 and top coat 7-1?

any other advice on this would be appreciated

cheers

 

[johniosaif]

.i would sbr at rate of sbr to water at 3/1 with sbr as theone and add cement till its nice and slurry enough to brush on,leave it for a day,first coat 5 to one, second coat a week later,6/1/1 sand cement lime, waterproof in first coat but follow guidelines.
you could mesh it if there were cracks but it's not really needed.

 

[irish_spread]

.i would sbr at rate of sbr to water at 3/1 and add cement till its nice and slurry enough to brush on,leave it for a day,first coat 5 to one, second coat a week later,6/1/1 sand cement lime, waterproof in first coat but follow guidelines.
you could mesh it if there were cracks but it's not really needed.

And scud maybe for mechanical key ?

 

[johniosaif]

And scud maybe for mechanical key ?

I didn't want them to know I was Irish,but yes I always scud since the eighties can't help it,,

 

[church]

As above dont get much better

 

[church]

BUT YOU COULD add a photo of a wasp dancing on a mountain with a weird face just for a laugh or picture of a pair of nuts cause you dont understand the question

 

[kebab king]

Or use a pre rend.

 

[jakejhnsn]

Thanks
so is that 3 sbr to 1 water?

 

[johniosaif]

It's funny how previously failed jobs always makes us query things even though it's our bread and butter work..

 

[johniosaif]

Thanks
so is that 3 sbr to 1 water?

Sorry it's the opposite, I didn't make that clear.

 

[jakejhnsn]

Sorry it's the opposite, I didn't make that clear.

Thought so, cheers for the advice

 

[johniosaif]

I mix sbr to water ,water at 3 sbr one,then I add sand/cement at 3/1 to this till its a slurry that suits me,

 

[bubbles65]

Grano dust:sand:cement :RpS_thumbup:

 

[johniosaif]

Ok 3 part water ; 1 part of sbr ; 3 part of sand ; and 1 part cement?


I'm using The Plasterers Forum Mobile App

that what I would do,but many may differ..

 

[superspread]

.i would sbr at rate of sbr to water at 3/1 with sbr as theone and add cement till its nice and slurry enough to brush on,leave it for a day,first coat 5 to one, second coat a week later,6/1/1 sand cement lime, waterproof in first coat but follow guidelines.
you could mesh it if there were cracks but it's not really needed.

You leave the slurry to dry before scratching ? do you slurry again so the scratch and slurry go in as one

 

[Arti]

Grano dust:sand:cement :RpS_thumbup:

is that the dust from Ace Ventura 2...........................:RpS_unsure:

 

[bubbles65]

It's my own rendaid marra :RpS_thumbsup:

 

[Arti]

It's my own rendaid marra :RpS_thumbsup:

Thinking outside the Bubble Box eh marra.............................:RpS_wink:

 

[irish_spread]

Grano dust:sand:cement :RpS_thumbup:

grano, thats a blast from the past old timer :RpS_biggrin:

 

[bubbles65]

Now then young Eddie :rolleyes)

 

[johniosaif]

People from 65 are a different breedbreed

 

[bubbles65]

A fine vintage indeedindeed :RpS_biggrin:

 

[Arti]

grano, thats a blast from the past old timer :RpS_biggrin:

so its not from Ace ventura 2 then...........................:RpS_confused:

 

[bubbles65]

no it's from my ace dashing trowel :RpS_thumbup:

 

[Arti]

no it's from my ace dashing trowel :RpS_thumbup:

Is that trash talk from the west Coast massive................boyeeeeeeeeeeeeeeee

 

[leebo02]

People from 65 are a different breedbreed

A fine vintage indeedindeed :RpS_biggrin:

:RpS_thumbsup: im with you both on that one:RpS_thumbsup:

 

[Fatarm]

Grano dust:sand:cement :RpS_thumbup:

Grano dust...used it for years...casting..screeding...mixed wiv sbr slurry....rock hard.:RpS_thumbup: well stocked in merchants up here ..uncle al:RpS_cool:

 

[Rossi46]

What is grano dust? Something I've never used or heard of :-/ is it the dust from granite cutting?

 

[Fatarm]

Its just like crushed granite rossi.
Like 6 mm casting chips to dust fines

 

[bubbles65]

Brilliant gear marra, once it's on you could climb up it :RpS_thumbup:

 

[keithuk]

Sounds like my hardwalling :RpS_blushing:

 

[Arti]

:RpS_laugh: and spanky's skimming

 

[Arti]

Brilliant gear marra, once it's on you could climb up it :RpS_thumbup:

so is the benefit of using it that its solid because of the dust??

 

[bubbles65]

I would liken it to Betakontakt for rendering Arti.
Mixed to a slurry and splattered onto the walls with a dashing trowel, not rolled on :RpS_thumbup:

And like any render mix it will be stronger with grit in it.

 

[cathal]

grano, thats a blast from the past old timer :RpS_biggrin:

grano was used a lot when doing treads and risers on stairs and also plats, a lot of guys used to add fondu to speed up the set. Topping steps etc was a standard plasterers task not that many years ago.