Rendering/ plastering .... problem

[Roadrage]

Hi all
I'm Rendering a small garden retaining wall...
And Having a bit of a problem with the mix or sand,
If anyone could help...

The wall is 2 solids high galvanized corner beads tops and corners...new blocks

Beads aren't sitting very proud so I need a fairy thin scratch coat and topcoat

I did a test today and The problem is the plastering sand seems to be very corse/gritty and won't work into the beads. (Irish plastering sand)
I tried it with and without a scratch coat, when I tried the scratch coat because the plastering sand was corse I couldn't get a thin enough coat..
So had to give up on that idea for the test
And just went with the one coat.

Then tried adding a bit of mortar sand into the mix which helped a bit,
but still when floating off the plastering sand seemed to be falling away or pulling away from the beads..

The mix just didn't seem muddy/ creamy enough
If that makes sense.... cement mixer was used

Mix was 4 kilsaran plastering sand
Cement 1
Waterproofer plasticizer and a bit of sbr

Any help would be appreciated
Thanks rr

 

[Ftp321]

Everyone's on lockdown

 

[jmoss5]

Your beads could be the problem . To tight perhaps ?

 

[Deleted member 32554]

Render does struggle to fix through skim beads lol

 

[Roadrage]

Thanks for the reply lads.
I was aware the beads shouldent be to tight before starting but I probably could have done with probably lifted them a bit more, I thought the plastering sand would skim a lot finer..the problem is more at the very edge/corner of the bead...I stuck up a few pictures and that was with the finer mortar sand added to the mix... hadn't a hope before that

 

[Stevieo]

Render does struggle to fix through skim beads lol

I was thinking that.

OP have you nailed those beads in tight as fook? Sorry I was going to leave this for people who do rendering but I couldn't help it?

Get a plasterer serves you right tightwad etc.

Any chance of a photo?

 

[Mouldyoldspudgun]

You need stainless or plastic beads galvanised will rot after a few years and your scratch coat needs to be thicker than the top coat and just scratch over wings of beads so you can get the top coat on

 

[Ftp321]

Galvanised bead failure last week

 

[Ritch]

Thanks for the reply lads.
I was aware the beads shouldent be to tight before starting but I probably could have done with probably lifted them a bit more, I thought the plastering sand would skim a lot finer..the problem is more at the very edge/corner of the bead...I stuck up a few pictures and that was with the finer mortar sand added to the mix... hadn't a hope before that

Use plastic beads,I find metal beads shite for rendering

 

[zombie]

Thanks for the reply lads.
I was aware the beads shouldent be to tight before starting but I probably could have done with probably lifted them a bit more, I thought the plastering sand would skim a lot finer..the problem is more at the very edge/corner of the bead...I stuck up a few pictures and that was with the finer mortar sand added to the mix... hadn't a hope before that

Any render will blow off that build within 12 months max!

 

[Complete]

Hi all
I'm Rendering a small garden retaining wall...
And Having a bit of a problem with the mix or sand,
If anyone could help...

The wall is 2 solids high galvanized corner beads tops and corners...new blocks

Beads aren't sitting very proud so I need a fairy thin scratch coat and topcoat

I did a test today and The problem is the plastering sand seems to be very corse/gritty and won't work into the beads. (Irish plastering sand)
I tried it with and without a scratch coat, when I tried the scratch coat because the plastering sand was corse I couldn't get a thin enough coat..
So had to give up on that idea for the test
And just went with the one coat.

Then tried adding a bit of mortar sand into the mix which helped a bit,
but still when floating off the plastering sand seemed to be falling away or pulling away from the beads..

The mix just didn't seem muddy/ creamy enough
If that makes sense.... cement mixer was used

Mix was 4 kilsaran plastering sand
Cement 1
Waterproofer plasticizer and a bit of sbr

Any help would be appreciated
Thanks rr

Use playpit sand

 

[smoother09]

knock that wall down and get it back to fence get some nice big pots for plants and put that trowel in retirement