emae009:


since it's a 2 bedroom flat, I presume it'll be a bungalow so casting the floor slab is not really that necessary except it's a storey building... but nevertheless you'll still have to waterproof the slab to prevent moisture from the ground from getting into the building

bodejohn:
In my opinion...the slab only does one job...damp proofing, I pressume that's why it's called the damp proof course.

It adds to the dead load on the house but does nothing directly to improve the strength of the building.

From my little research, the are many types of materials used in the dpc, we have only adopted the concrete slab here as the method used in most cases.

The dpc majorly prevents upward movement of damp or moisture and seals the inside of the house from ants and some nasty rodents. A three or four inch thick of concrete slab should suffice.

arcme111:
The minimum thickness of a floor slab is 150mm

bodejohn:
In my opinion...the slab only does one job...damp proofing, I pressume that's why it's called the damp proof course.

It adds to the dead load on the house but does nothing directly to improve the strength of the building.

From my little research, the are many types of materials used in the dpc, we have only adopted the concrete slab here as the method used in most cases.

The dpc majorly prevents upward movement of damp or moisture and seals the inside of the house from ants and some nasty rodents. A three or four inch thick of concrete slab should suffice.

felzylix:



please do not miss inform the public if you are not sure of what you saying, Concrete slab and not DPC is a structural member of the foundation, it bears the load to be transmitted to the foundation thus requires rigidity, DPC Damp proof Course is just a thin membrane of polymer laid beneath the courses of the wall to prevent moisture from percolating through the wall leading to dampness, unlike DPM damp proof membrane which is a thin membrane of polymer laid over thr entire area of the foundation before casting the oversite concrete. oversite concrete in some cases are not even sufficient to prevent ground water from percolating.

felzylix:



please do not miss inform the public if you are not sure of what you saying, Concrete slab and not DPC is a structural member of the foundation, it bears the load to be transmitted to the foundation thus requires rigidity, DPC Damp proof Course is just a thin membrane of polymer laid beneath the courses of the wall to prevent moisture from percolating through the wall leading to dampness, unlike DPM damp proof membrane which is a thin membrane of polymer laid over thr entire area of the foundation before casting the oversite concrete. oversite concrete in some cases are not even sufficient to prevent ground water from percolating.

Emusan:


I found this disturbing! why? Oversite concrete not only good for damp proofing but also for preventing floor punching. That's why oversite concrete thickness defers based on the live load coming on top.



It's not necessary to add oversite concrete weight to the structure, it can be separated.



This is where you mixed them together, Oversite concrete and DPC are different though oversite concrete can be used as a DPC material.



You're partially correct but about the thickness it depends on the load, imaging a floor for heavy duty machine or banking hall. The thickness and preparation must be different.

victorazy:


the minimum is 150mm (6" ) let no one deceive u

victorazy:


the minimum is 150mm (6" ) let no one deceive u

ADAMUdaCOWBOY:

Why is it necessary in storey buildings? Ground floors are the same whether bungalow or duplex, the standard for ground floors is the same. You make them damp proof and 150mm so they don't fail after a while.

Mup4life:
pls i nid advice if 3or4 inches height is suitable just for a 2bedroom flat thnks in anticipation of your answers.

Mup4life:
i know sir but the area is dry not disturbed by water at all so was looking to know if it has any effect if it is reduced to say approximately 4inches.

emae009:


since it's a 2 bedroom flat, I presume it'll be a bungalow so casting the floor slab is not really that necessary except it's a storey building... but nevertheless you'll still have to waterproof the slab to prevent moisture from the ground from getting into the building

RobbStark:



You talk like a road side taylor. Hw cud you advice that casting the floor is not necessary.

OP, if you cant do 150mm cos of cost, dont go below 100mm i.e 4 Inches.
There is every tendency that if you go below the above stated height, the floor might get broken or cracked easily wen something like say woods during roofing fall on it.

I speak wit experience.

felzylix:
100mm, 4" inches. that is the minimum allowed. ensure hardcore filling is well compacted, do not compromise the standard, build right...

bodejohn:


I am not misinforming the public, I only expressed my opinion which I am sure of. You are however free to disagree with superior argument not just conjectures.

I still insist that mortar is one of the materials used in damp proofing.

templeinyou:


Is it that without german floor a storey building cannot be ercected ?

emae009:


what that means is that for a storey building casting of the ground floor is absolutely necessary but it's not for a bungalow since the load it transmit to the ground strata is not much... I didn't say you should reduce the thickness of the casting