9 ft is a decent height for starting false ceiling. You can opt for a max 6 inches drop.
Some of the Pros: Reduced Air conditioning space hence electricity bills, provides air cover against heated ceilings ( if any). Ceiling light placement can be easily customized and wiring can be hidden. Uneven ceiling is covered with a smooth surface and better acoustics may be planned therein.
Some of the cons: Lesser ceiling heights ( specially for taller owners) , overused. Non-visible dirt collection or hiding spaces for lizards etc.
Maintenance: If done properly there is hardly any maintenance required besides painting.
Costs: Good quality branded frame and sheets should start from 100 per sft. ( Market rates for substandard products start from 50 onward)
You can opt for visible wiring or laminated plywood ceiling designs in case you are not keen on POP/Gypsum False ceiling.
Cornerstone Designs, Bangalore.
Try an unorthodox and inexpensive solution as I am doing: simple thin bamboo spaced 1" apart. Very versatile to use, and allows spaces for lighting, fan, wiring etc. In may case, I am using it with a glass roof to allow in the light through the bamboo strips.
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The ceiling height of 9' is appropriate enough to incorporate false ceiling. As told earlier, the difference/drop would be around 6"-8" .
There are many advantages of installing a false ceiling e.g. air gap for heat insulation, hiding conduits and wiring, appropriate and uniform room illumination, reduced cooling costs, clean and minimalist look etc.
However, certain disadvantages concerning to fire safety, insect breeding and delayed water leakage detection couldn't be ignored either. Having said that, a properly installed ceiling will last atleast 7-10 years with minute maintenance.
There are several alternatives to false ceilings. Trending are :
Wooden slats/ louvers
Bamboo slats/ louvers
Laminated plywood/WPC slats
Mangalore ceiling tiles
OSB ceiling panels
Costing : Gypsum (Saint gobain or equivalent)- 85-200 / sqft as per designs
Maintenance overhead : 2-5% of material cost annually.
I would suggest laminated WPC slats for a rich contemporary look with appropriate illumination .
@teja menenni: I have no published reference for my suggestion, just an idea that I have tested in one glass covered balcony in my house in the photos below. Spacing can be adjusted as desired.
Therefore from the above fact, we can conclude that the minimum ceiling height should at least 9 ft. 6 inches for any habitable room in residential building.
Since you only have 9' ht for your 3bhk apt, I would recommend you to take only 3" ceiling ht that will be enough to hide all electrical wires and fix conceal spotlights and if you want an interesting play with design you can go upto 6" in certain places.
Let your space breathe with more height.
For a 1400 sqft house a rough estimated cost for gypsum false ceiling work can be around 80-90k.
Pros of a gypsum false ceiling are that it hides all your wiring, concealing spotlights, and a false ceiling plays a major role in giving your house a designer look. And for maintenance it just needs regular dusting that we carry out weekly or monthly in our house.
Answer : ( 8'-6" below false ceiling...)
2) what are the pros and cons with false ceiling?
Answer : Advantage is...
1) If ur staying below terrace flat, False ceiling will to reduce heat.
2) To hide electrical wiring conduit pipes which will hide inside the false ceiling.
3) to hide any electronic devices inside the false ceiling, by using trap door, to service the wiffi, telephone, router, etc.
3) how much does it will cost for 1400 sft 3bhk?
Answer : ( 2 Option )
1 Option ) 1400 is not totally will be used for false ceiling, i hope except balcony, bathrooms, etc here it is not necessary, so asume only 1100 Sq.ft Carpet Area = 99000/- Flat ceiling.
2 Option ) Additional design ( Up / Down - level difference for Cove Lights ) Asume 35000/-
Total Cost = 1,34,000=00
4) is it only for aesthetics purpose or any functional advantage?
Answer : Both as Explained Above.
5) how much overhead interms of maintenance?
Answer : No Maintenance Cost, If not damaged by water.
6) any alternatives for false ceiling to get good lighting and rich look?
Reflected Cove Light which is mentioned in Sr.No. 3 ( option 2 ) Additional Cost