Laying Concrete

[Fin199]

Hi, I've got a old shed that i wish to transform, but firstly i need to upgrade the old floor. The floor has been made up of old flagstones placed on bear soil. and over they millions of years it has became uneven and a really health hazard. not to mention the damp created. So i have began work or ripping up the old flags and now need to dig down. My plans are to put down some damp core, then put down 2inches (50mm) of kingspan/celotex insulation and then pour 5inches (125mm) of concrete onto of that. the insulation would have to have holes bored to support the concrete. how does this sound? any suggestions would be much appreciated


Thanks
Findlay

 

[kd3pc]

You will need to dig down further and create a sub base that will support the concrete floor to come.

In most areas, that means 8-10 inches of removed soil/top/sod and then tamped layers of gravel/stone AND then your insulation/vapor barrier. then steel and finally the concrete poured.

Not sure what you are boring the insulation for? It should be as close to one big sheet as possible for maximum effect as a thermal break.

Best of luck.

 

[bczygan]

You LAY women.

You PLACE concrete.

Above advice is good.

What is your location?

 

[Bronson]

You LAY women.

You PLACE concrete.

Above advice is good.

Here in Texas, We pour concrete.

 

[Chris705]

No need for holes in your insulation board, just lay, place & pour it right on top of your EPS or extruded foam board. I believe "damp core" is like a stone dust base? A fine mix that packs well. "Celotex" is not polyisosanurate is it? You don't use that type of insulation below grade.

 

[rburke65]

I think he is in Scotland.

 

[Bondo]

Ayuh,..... What kinda Floor Loads are ya lookin' at,..??

5" of concrete, it an awful lot of concrete,....

 

[Fin199]

hey, do you like 4 inches with be enough?

 

[Bondo]

hey, do you like 4 inches with be enough?

Ayuh,.... What sorta loads are ya lookin' to put on it,..??

Just walkin' on it,.... 2", 3" is Plenty,....

Jackin' up cars, 4"s enough,....

 

[Fin199]

I believe "damp core" is like a stone dust base? A fine mix that packs well.

damp core as far as I'm aware is like thick plastic. you just put it on top of the soil and part way up the wall so when you pour the concrete its contained in a plastic membrane. It stops moisture rising from underneath.

 

[Fin199]

Ayuh,.... What sorta loads are ya lookin' to put on it,..??

Just walkin' on it,.... 2", 3" is Plenty,....

Jackin' up cars, 4"s enough,....

right thats perfect. after speaking to a few scottish guys they said 5 inches but they seem to always 'over engineer' and over do things.

 

[Fin199]

You LAY women.

You PLACE concrete.

Above advice is good.

What is your location?

I apologise.

 

[Justanoldguy]

You LAY women.

You PLACE concrete.

Above advice is good.

What is your location?

We Lay concrete here in NZ.
You need to be more flexible with your thinking on a global site.

 

[Justanoldguy]

Ayuh,.... What sorta loads are ya lookin' to put on it,..??

Just walkin' on it,.... 2", 3" is Plenty,....

Jackin' up cars, 4"s enough,....

2" is NEVER ENOUGH for anything.

 

[Fin199]

2" is NEVER ENOUGH for anything.

Not even laying women?

 

[Justanoldguy]

not even laying women.
Not even a Scottish RedHead.

 

[Notgrownup]

Mine is 4-5" with fiber mesh in the mix vapor barrier and 12x12 footers... I don't have much freeze n thaw here...

 

[Fin199]

not even laying women.
Not even a Scottish RedHead.

Hahahahaha!

Mine is 4-5" with fiber mesh in the mix vapor barrier and 12x12 footers... I don't have much freeze n thaw here...

I think 4-5 inches will be plenty and a but of celotex underneath to keep a bit of heat in will work well!