Thermalite blocks

[ajackson]

Can you render thermalite blocks??

 

[beader]

Yes.

 

[essexandy]

Yes

 

[ajackson]

Got a job where the render is cracking can not understand why??

 

[beader]

Internal or external ?

 

[essexandy]

Got a job where the render is cracking can not understand why??

You need to give us more information mate, you only asked whether you could render onto Thermalites.

 

[ajackson]

Internal in a garage

 

[essexandy]

Internal in a garage

Come on this isn't a guessing game. Actually it is for some on here but give us more to go on.

 

[ajackson]

Made sure the wall was given a bonding agent as they are high suction put 4-1 scratch coat on then top the same. bin on 2 week customer phones me saying it cracking and bits are hollow. ??

 

[beader]

Mix was to strong. should of used a 6 ~1 .Have you skimmed it if so how long did you leave it to cure before setting?

 

[ajackson]

No just smooth render left scratch couple of days then topped it carnt of drawn in to much as top coat took a good while to set.

 

[bumblebee]

Use an sbr to control suction and would you suggest meshing base coat , simples

 

[essexandy]

If it's in a garage why did you two coat it? I'd have just one coated it, no bonding agents, just one coat at 6:1.

 

[johniosaif]

If it's in a garage why did you two coat it? I'd have just one coated it, no bonding agents, just one coat at 6:1.

As above but I would of scudded it first,

 

[Rigsby]

Fair do's he did use a bonding agent to separate the render from the block. I suspect it is because it is too strong a mix. Could have been 6:1 base and slightly weaker top being inside.

I did one in 1984 ( I know because the miners was on strike, again), 4:1 on Black Jack binded with sand. 2 coats on a cellar wall and 1 month later cracks all over! Left it another month and then re-skimmed it.

Regarding this one you could always skim it if the 'hollow area' is not bad. Otherwise repair the hollow, bonding agent and re-do.

 

[ajackson]

Done 3 walls and two are blown but the other one is sound begging to think that the sand I got from the merchants had frost as it was cold that day.

 

[johniosaif]

Was it too cold to plaster?

 

[beader]

Done 3 walls and two are blown but the other one is sound begging to think that the sand I got from the merchants had frost as it was cold that day.

If thats the case you would of known when spreading the gear because of the hard lumps. Now if you have ever had lots of cat **** in your sand you find out after you have set the walls as lots of little white patches appear as the finish drys funny on cat poo.:RpS_mad:

 

[superspread]

Thermal movement

 

[carlos]

How thick is it and how soon after you did it did the cracks appear???

 

[superspread]

If its any consolation pound to a penny everyone on here has expierienced something similar

 

[beader]

And worse:RpS_crying:.

 

[superspread]

And worse:RpS_crying:.

Lol,iknow wot your saying beader

 

[Arti]

If its any consolation pound to a penny everyone on here has expierienced something similar

Except minge or b1lly or whoever he is.......

 

[johniosaif]

We all learn by **** ups!