My proposed patio will be made with 450mm slabs. As it is at the back of the
house there will be no vehicles driving on it.

I have lots of sand and it is my intention to lay the slabs on a 100mm bed
of sand which has been dry mixed with a 1:15 cement addition.

Has anyone experience of this method? I appreciate that it is usual to put a
subbase of stone down first but that'll be around £300 extra and I've plenty
of sand.

mark

"mark" wrote

My proposed patio will be made with 450mm slabs. As it is at the back of
the house there will be no vehicles driving on it.

I have lots of sand and it is my intention to lay the slabs on a 100mm bed
of sand which has been dry mixed with a 1:15 cement addition.

Has anyone experience of this method? I appreciate that it is usual to put
a subbase of stone down first but that'll be around £300 extra and I've
plenty of sand.

mark
Is the area well compacted or likely to settle?
I did a similar job years ago as you describe (except 50mm sand/cement dry
mix well stamped down).
But mine was on well compacted ground with significant clay content.
Check out www.pavingexpert.com for qualified advice.

Phil

"mark" wrote in message
et...
My proposed patio will be made with 450mm slabs. As it is at the back of
the house there will be no vehicles driving on it.

I have lots of sand and it is my intention to lay the slabs on a 100mm bed
of sand which has been dry mixed with a 1:15 cement addition.

Has anyone experience of this method? I appreciate that it is usual to put
a subbase of stone down first but that'll be around £300 extra and I've
plenty of sand.


Ants are strong....
--
Vass

TheScullster wrote:

Is the area well compacted or likely to settle?
I did a similar job years ago as you describe (except 50mm sand/cement dry
mix well stamped down).
But mine was on well compacted ground with significant clay content.
Check out www.pavingexpert.com for qualified advice.

I looked at this article and found it interesting.
I'm hoping to lay a small patio in part of a garden,
and am not quite sure if I ought to get a professional to lay it.
The soil is very soft in this garden.
I see that the diagram at the end of the above article
shows the slabs laid on a "prepared sub-grade"
covered with a 2in grit/concrete mix.

But what exactly is the "prepared sub-grade"?

--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

mark wrote:
My proposed patio will be made with 450mm slabs. As it is at the back of the
house there will be no vehicles driving on it.

I have lots of sand and it is my intention to lay the slabs on a 100mm bed
of sand which has been dry mixed with a 1:15 cement addition.

Has anyone experience of this method? I appreciate that it is usual to put a
subbase of stone down first but that'll be around £300 extra and I've plenty
of sand.

mark



I laid mine 20 odd years ago on 100mm of sharp sand, and no cement apart
from the edges. No problems so far, but the soil was pretty stony IIRC.
I was doing it a bit at a time, so I just packed the slabs out
individually as I went.
I overdid the fall away from the house a tiny bit, but that's probably a
classic beginner's mistake

"Timothy Murphy" wrote in message
...
TheScullster wrote:

Is the area well compacted or likely to settle?
I did a similar job years ago as you describe (except 50mm sand/cement
dry
mix well stamped down).
But mine was on well compacted ground with significant clay content.
Check out www.pavingexpert.com for qualified advice.

I looked at this article and found it interesting.
I'm hoping to lay a small patio in part of a garden,
and am not quite sure if I ought to get a professional to lay it.
The soil is very soft in this garden.
I see that the diagram at the end of the above article
shows the slabs laid on a "prepared sub-grade"
covered with a 2in grit/concrete mix.

But what exactly is the "prepared sub-grade"?

--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland


http://www.pavingexpert.com/subgrade.htm

On Mar 24, 10:48*am, "TheScullster" wrote:
"mark" wrote

My proposed patio will be made with 450mm slabs. As it is at the back of
the house there will be no vehicles driving on it.

I have lots of sand and it is my intention to lay the slabs on a 100mm bed
of sand which has been dry mixed with a 1:15 cement addition.

1 Cement to 15 sand !! The ants will think is there birthday. even
the worms will love mixing it in.
More like 5 sand 1 cement