render wont set

[johnawalker]

hi all i am reasonably new to plastering had a couple of years experience but every time i seem to try rendering every thing gos fine but right at the end of the day there is all ways a little square that wont go off i am not working at the min but my mum wants me to do a bit for her and was just looking for some tips thanks

 

[Rigsby]

At this time of year it isn't going to go off. Either use accelerators (frost proofers) or create a bit of suction. The other problem will be water in the mix running down and the bottom won't go off. It's a waiting game.

If you can wait till at least mid April when the air is drier.

 

[johnawalker]

thanks mate will prob wait till weather gets bit better any way was just looking for tips in advance

 

[carlos]

Use less waterproofed in the scratch coat. Frost provider in the top coat.

As said the best thing to do is wait till warmed times.

 

[mayti]

make sure backing coaets flat so when top coat goes on your applying the even coverage

 

[Jace]

we done a house a couple of weeks ago about 3 weeks i think and we used jet cem on the bottom 3rd of the elevation and it worked a treat

 

[gooner59]

Well chuck a bag of castor sugar in the mix , that aught to do it !................ lol

 

[Rigsby]

Well chuck a bag of castor sugar in the mix , that aught to do it !................ lol

Don't tell them that! Sugar dissolves cement.

 

[Rigsby]

You could always use Lafarge Rapid. Set for me last December at 3c in 3 hrs below dpc level.

 

[jamesthefirst]

You could ask my misses to look at it! Would soon go off.

 

[Minh]

make sure backing coaets flat so when top coat goes on your applying the even coverage

There's no need to rule the scratch coat

 

[johnawalker]

thanks all appreciate the advice

 

[Jace]

There's no need to rule the scratch coat

depending on the substrate if you rule the scratch its goin to make the top coat a hell of a lot easier depeneds on how easy you want to make life for your self

 

[carlos]

You could always use Lafarge Rapid. Set for me last December at 3c in 3 hrs below dpc level.

I use this when rendering over tanking, sets the gear up a treat.

 

[johniosaif]

I use this when rendering over tanking, sets the gear up a treat.

I find the rapid shows signs of salts,is it just me?

 

[carlos]

I use this when rendering over tanking, sets the gear up a treat.

I find the rapid shows signs of salts,is it just me?

If we get a comeback involving salts in damp replastering it is normally where rapid cement has been used. It's like it affects the additive somehow.

 

[mayti]

There's no need to rule the scratch coat

well each to it own:rolleyes)

 

[johniosaif]

There's no need to rule the scratch coat

Always always always rule the scratch coat, a base coat is to be left flat and hollow free so that a lighter floating coat can be applied, you rule it ,check it and bead it, is it just me...?

 

[essexandy]

Always always always rule the scratch coat, a base coat is to be left flat and hollow free so that a lighter floating coat can be applied, you rule it ,check it and bead it, is it just me...?

I generally bead first and then rule the first coat.

 

[Ivor]

I found I bars are mint the next day over a scratch coat Just to take any high spots off ect ...

 

[Ivor]

Is this little square at the bottom of your wall along the bell cast by any chance ?