Hi All,

I am extending a concrete bas on which I am building a conservatory. I need
to add an extra 320mm to the depth. Do I need to add anything between the
old base (only 3 weeks old) and the new 320mm one?

Cheers

On Sun, 30 Oct 2005 20:24:28 -0000, "Pedro Popadopolous"
wrote:

Hi All,

I am extending a concrete bas on which I am building a conservatory. I need
to add an extra 320mm to the depth. Do I need to add anything between the
old base (only 3 weeks old) and the new 320mm one?

Cheers


Is the base sufficient strength, and you are lifiting it ? If so it
may be worth considering adding 320mm of polystyerine in the middle,
and making the dwarf walls a bit taller round the sides.

Rick

"Rick" wrote in message
...
On Sun, 30 Oct 2005 20:24:28 -0000, "Pedro Popadopolous"
wrote:

Hi All,

I am extending a concrete bas on which I am building a conservatory. I
need
to add an extra 320mm to the depth. Do I need to add anything between the
old base (only 3 weeks old) and the new 320mm one?

Cheers


Is the base sufficient strength, and you are lifiting it ? If so it
may be worth considering adding 320mm of polystyerine in the middle,
and making the dwarf walls a bit taller round the sides.

The new base will hold the majority of the conservatories weight as its the
front edge that needs to be added. So all the doors, frames and the roof
will be held on this bit.......

My concern is really, can I just 'Add' 320mm onto the base, or do I need to
bolt the new bit to the old bit or do I dig it all up and start again? I am
allso wondering about having to 2 DPM's overlapping as I will need a new dpm
on the 320mm add on :-)

Thanks

In article ,
says...
Hi All,

I am extending a concrete bas on which I am building a conservatory. I need
to add an extra 320mm to the depth. Do I need to add anything between the
old base (only 3 weeks old) and the new 320mm one?

I suspect you're talking about adding to the breadth of the slab. Other
respondents seem to be interpreting "depth" to mean thickness.
I'm not an expert, but I suspect you'll need to tie the two slabs
together with something - maybe some rebar loops fixed into the existing
slab (with resin?).

I am extending a concrete bas on which I am building a conservatory. I
need
to add an extra 320mm to the depth. Do I need to add anything between the
old base (only 3 weeks old) and the new 320mm one?

If you mean depth, then loads of insulation and some embedded underfloor
heating pipes and screed (even if you don't actually connect the underfloor
heating up yet). If you actually meant width, I'd probably follow Rob's
advice, to avoid the two parts going their separate ways.

Christian.