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Posted: Thu Jun 19, 2014 3:06 pm
by dig dug dan
I am starting a job soon and willbe laying 600 x 900 b50's (210 of them)
I have a vacuum slab lifter which i will hang on the end of the avant.
For speed, i was going to set up screed rails, and screed out 10mm readymix (dry mix) and lay these as if it were block paving
Its pedestrian traffic only.
Otherwise, i would be there a month of sundays
any thoughts?
Posted: Thu Jun 19, 2014 5:05 pm
by ilovesettsonmondays
We use to screed them on sand and cement bed . They look fine for a cpl of years ( pavement not patio) . Council banned screeding now back to laying them individually on lime mortar now . Are you butting them or pointing them . If you do screed them I would reccomend sand and cement through mixer or bought in screed . 3 days easy work laying individually for a good mason if job is straightforward
Posted: Thu Jun 19, 2014 5:13 pm
by lutonlagerlout
what we found dan is that even with sand and cement you need to wack the gear before you screed it
then just dob them in with the sucker (lucky you)
as chris just lately we have been laying them individual but you need a good 50 mm of gear under them or they are a bugger to get down
LLL
Posted: Thu Jun 19, 2014 6:03 pm
by dig dug dan
was going to wack it. The readymix company said screed was not good for outside use, so they said get 10mm concrete which is cheaper.
I am butting them. They guy who is helping me tends to fanny to much with wet laying these things, he would cost me a fortune in time 
hence why i want to try this method.
Should i wack it , screed and wack then lay on that?
Posted: Thu Jun 19, 2014 7:04 pm
by lutonlagerlout
screed slightly high
wack then rescreed
I have done it this way and you always tend to get little 1-2 mm lips no matter how careful you are
are edgings in or is it freehand?
very unforgiving the old 3 by 2s
LLL
Posted: Thu Jun 19, 2014 7:06 pm
by dig dug dan
One edge is an existing concrete path, the other is, or will be grass.
This is for the local council at a sheltered housing block for oaps
Posted: Thu Jun 19, 2014 8:29 pm
by r896neo
Screeding 10mm concrete isn't going to be much fun?
Posted: Thu Jun 19, 2014 8:40 pm
by Dave_L
10mm concrete oversanded will be just fine, we do it all the time.
Posted: Thu Jun 19, 2014 10:25 pm
by ilovesettsonmondays
Lol the ready mix company is talking bull.thats why he sells concrete;)
Posted: Thu Jun 19, 2014 10:42 pm
by lutonlagerlout
my thoughts exactly
otherwise all patios would be no good
LLL
Posted: Thu Jun 19, 2014 10:58 pm
by sy76uk
There are no other slabs that go down on a screed bed as well as a 3x2.
Make screed, set up rails, spread the screed, wack it, lay it and bump lips if there are any.
Posted: Fri Jun 20, 2014 1:15 pm
by sy76uk
Just put a post in the wrong thread :laugh:
Posted: Fri Jun 20, 2014 6:52 pm
by dig dug dan
i should add that the concrete company sell screed also, so its not as if they were trying to get a sale!
Posted: Fri Jun 20, 2014 8:09 pm
by msh paving
Screed or concrete they will both do the same, I have only every wacked screed once and went to hard to pull the scred board, since then I have just give it a light treading down, using a wacker plate wont allow any knock down with the slab.
But everyone has there own way, they would lay on screed sand just as well, we have laid a few school slab jobs on sand and was in the spec.
MSH 
Posted: Fri Jun 20, 2014 8:13 pm
by sy76uk
I find that any 50mm grey goes down so well on a good screed bed I never get any lips. You do need long arms for the 3x2s though.