Rendering onto thermalite blocks

[superspread]

My old man use to do grano,use to lay the grano in the morning and go back later in the evening to trowel it up to finish it

 

[essexandy]

Assuming the blocks were pretty clean I wouldn't bother with any of the above ******* about! Two coats of the right strength gear with added fibres job done. Done miles of rendering on lightweight blocks without issue.

 

[bubbles65]

First time I rendered thermalites would be 30 years ago Andy and I wasn't aware of fibres being available then.
I've always used a splatter-dash coat if I've thought it necessary and I've never had any issues either :RpS_wink:

 

[johniosaif]

In a previously failed job its better to make sure that it stays on,

 

[irish_spread]

Years ago when architect used to specify mix ratios etc, I (or the subby I was working for) would get the architect to sign a disclaimer saying we had queried advice and recommended scudding.
after a lot of render failures the architects seemed to start listening :RpS_biggrin:

 

[johniosaif]

Years ago when architect used to specify mix ratios etc, I (or the subby I was working for) would get the architect to sign a disclaimer saying we had queried advice and recommended scudding.
after a lot of render failures the architects seemed to start listening :RpS_biggrin:

Some job to get the to sign anything these days.

 

[Hairybear]

I'm no authority on rendering but when I have, I've done a slurry coat (sbr/water/cement), allowed to dry. Then, I lay the scratch onto a second, lighter coat of slurry whilst tacky....gives the key. I suppose this is the same principle of skimming onto bent walls with a fair amount of pull.....

Maybe why im not the most effective and **** at laying large areas alone, but seems to work ok?

 

[carlos]

Same as everything else, different people have different methods.