rendering

[christ]

in the middle of rendering a wall at my nan's ,, i layed the top coat on 1.30 this after noon the bottom 4 inches is still sagging, i used a piece of wood across the bottom intsead of bellcast, will i still have this problem if i use a metal or plastic bead,, what do i do to stop this happening? also the i did the scratch coat yesterday so the wall was still quite damp? thanks

 

[S a plastering]

could be a few things mate coat too heavy not letting the scratch dry out for a couple of days at least too much w/p in scratch it shunt really be sagging in weather like this now

 

[christ]

the top coat is about 12mm but the wall was still quite damp as i dubbed the wall out before i scratched it.. didnt use any admitures, ill probably leave the scratch dry out next time...

 

[richardbrown]

let your scratch coat cure and have all rendering on by 10 am in the winter ...... 2 pm in the summer

 

[big ali]

no admixture? did you not use feb?

 

[nelly]

This is happens sometimes, its just a pain in the arse.

 

[church]

The render has to be correctly mixed using the correct ammount of ads, lime ,water etc, render cant be under or over mixed this only comes with rendering experience , the time of year also the time of year and weather temps make a huge difference , c utting down on w/p ,thickness of top coat and starting at the bottom of a wall and working upwards help this time of year , but you cant be putting on top coats in the afternoon and expect to get it finished properly this time of year .

 

[christ]

cheers men,,, lots of helpful information thanks,, also i forgot to say it was a garden wall, no dpc.. it looked ok the next day, but it is now tyrolean..

gona render an old stone wall next,, do i need 2 to apply sbr slurry before dubbing the wall out

 

[henry]

Dont forget mate when rendering the water and moisture will make it way to the bottom of wall. Even more so this time of the year.