sagging top coat after floating where scratch lines are

[DuffMcKaganIsClass]

What causes this ? Two walls did it today , after id finished got a call to say it was coming through , and a wall I did last week which is already set has started also supposedly. I didnt even soak the wall down as there is no suction even if they are damp from a soaking and its dried in. Someone else has done the scratch coat. I am just top coating

 

[johniosaif]

Probably the scratch has loads of waterproofer, not enough mechanical key, hate following another person.. Scud coat might help but adds to time and cost.

 

[DuffMcKaganIsClass]

Its got lots of waterproofer I believe. I could understand if id soaked the wall down first and it sagged down. if the scratches are too deep can that cause problems

 

[Rigsby]

Was the scratches deep? Was it scratched sraight (tut tut) or wavy like goods spreads do.

 

[bubbles65]

:RpS_biggrin:

 

[User________removed]

To much water proofer probably, also if the scratches are too deep and any water sits in them it will happen also. If the scratches are in straight lines lay your gear on left to right rather than up and down this will push any water out. Leave it a bit longer to take up before ruling, the more you mess with it the worse they will get.

 

[Fatarm]

Vertical scratch for the real pros...:RpS_wink:

 

[kebab king]

Rule no 1. Never follow another Spreads scratch coat.

Proabaly better put a coat of Rendaid over it if has not adheared.

Wat mix was on the scratch and wat did you put on the top.

 

[DuffMcKaganIsClass]

Ok. Its adhered fine kebab, customer had no idea what scratch was so I put a 5:1:1 on top

 

[essexandy]

I guess you've either mixed your muck to wet, put it on to thick or most likely both.

 

[DuffMcKaganIsClass]

I see , its on about 6-8 mm , 10 at the most where the beads are, its only in small areas in random parts of the wall also. I dont think it was too wet as done afew walls on house before and they are perfect.

 

[kebab king]

If theres loads of waterproofer in there ya 5-1-1 mix may not be strong enough.

 

[nickelarse]

Vertical scratch for the real pros...:RpS_wink:

Iv seen that a few times

 

[nickelarse]

What do people think are the benefits of a wavy/straight scratch? Apart from it looks nice

 

[DuffMcKaganIsClass]

Shitballs.

 

[grump]

perhaps the last guy who scratched it fell out with the client and threw diesel all over the wall, like an evil genius.

shitballs?

 

[DuffMcKaganIsClass]

They did fall out . Theyve built out all the bellcasts and not cut it back. So theres only maybe 1mm on the bead left, im some places none. In some windows theve stuck 30mm beads ontop of scratch coat?!! And in other places theyve used 10mm beads. Its a disgrace, thats **** balls