external rendering

[christ]

hello,, been skimming for about 4 years now and ive starting to dabble in a bit of rendering and ive a few questions to ask the experts,, ive done a few small brezze block walls, flat and tyrolen so far...

do i need to use admixture,, or can i use hydrated lime as plastersizer.. does every1 use plastersizer/waterproofer..
and is using lime a must when using cement based render?

when using a feather edge to rule off,, does it matter if there are holes or feather edge marks on the render before it is rubbed up with a float?

if any1 has any pictures of flat render after its been ruled off and before its floated id really appriciate it thank.

also does every 1 use screeds?

thanks chris

 

[plasterjfe]

Are you 'Thee' christ? as in jesus.

after you rule straight u can close the surface with a spat or trowel but the float will do most of the finishing. I dont know anyone who uses plumb screeds, there is no time for that in the real world but I bet there is someone on here who does and they will be along shortly giving u the low down

 

[spunky]

Rule it flat mate don't plumb anything up except beads 9/10 times the blockworks s**t

 

[lucius]

Yeah i do some times but only on scratch maybe on stone work which is miles out and needs dubbing or S&Cthat is not finished but has to take something else.Antiques road show right now guy bought watch for £1500 valued at£10000, better than plastering

 

[owls]

just watching it now saltaires about 15 mins from me

 

[owls]

water proofer in scratch coat.hydrated lime on top coat.never use screeds altough if your a novice it might be worth while as will the addition of fibres in top coat

 

[christ]

thanks lads

 

[pwi]

should also add that lime does not work well with addmixtures . and try keep ur scratch coat as neat as possible this will help you when you stick on ur top coat

 

[owls]

yep good advice,get your scratch coat as flat as poss it makes like easier,and dont mix any admixtures when using lime.