Yes, you are right..rm10 pfr for L-Box and rm13 pfr for L-Box light through 

Quite expensive...get quotation from another contractor..standard board is 9mm thick..

Sifu Sifu,

  I need advice. Im doing L-Box plaster ceiling and wanted to know the position of the lighting inside. I plan to use T5 lighting, but not sure what is the best position for more light to shine from the box.

Below is the pic of the cross section of the LBOX. Which one is best, and which one ppl normally use?

Actually in the market there are few sizes available for plaster ceiling mainly 5mm, 8mm,9mm,12mm etc. However most construction prefer to use 9mm thick plaster board in which is commonly used after install to reduce flimsiness. 12mm rarely used as it's thick and price may not come cheap if use in big or mega project. Therefore 9mm has been word of mouth for everybody if they mention plaster ceiling. As for 8mm it's mainly use in household renovation as it's cheaper than 9mm and quantity to be use is less and therefore reduction of flimsiness.

For 9mm thk price for L-box is on the range to RM12 to RM15 and for light through is on RM17 - RM 25 depending on the design. However on 8mm thk the price is normally RM10 -RM13 for L box and RM 14 to RM17 for light through depending on the quantity. Thus your contractor price is reasonable charge. I suggest to ask the contractor to go for the thinner but must be 8mm thk. If he give you lower than 8mm please don't go, as anything lower than 8mm will be very flimsy after installation and your plaster ceiling will tend to sag over the time. 

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Added on March 22, 2012, 8:18 am
Price is reasonable.
As your quantity is small therefore contractor charge per lump sum and cannot charge per unit rate.
Eg. 450*RM3.20 = RM1,440.
Labour for installing fan and cutting RM 400 (Assuming 2 labour)
Profit RM 400 . THus total RM2,200 ++
Contractor cannot do with this price as it they need to cover transportation and preliminary cost. However you can always ask for discount price anything more than RM2,20 is already profit.

Painting price is reasonable
Eg. 450*RM0.6/sft = RM270. However due to low quantity contractor again charge lump sum. You may ask for discount

M&E price is reasonable.
Market price charge for power point is normally RM80 per point , lighting RM60 incl looping if necessary.

SO overall i believe the price is on par with the market price. What you can do as customer is to ask for overall discount since the rate is ok. Good luck.

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Added on March 22, 2012, 8:20 am
That price is very cheap as it's even lower than construction price. Please make sure they're using at least 8mm board. I believe price that cheap is 8mm lower. 

Hi all,
Just wan2 ask, if i want to conceal my curtain railing above the flat board. should i install the curtain railing before they install the plaster ceiling or after?

photo sharing

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Added on August 22, 2012, 1:20 pm
really? is a condo at ampang area

ANother question as well.....
Do you guys repaint a new house inner part after the plaster ceiling, hacking for concealed piping and etc?

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Added on October 14, 2012, 7:04 pmMore and more questions to ask when renovating....
PEning di....
Hahaha
Want to ask one more question, the charges for installation of lights in RM 10 per one light by my contractor.....doesnt matter normal light or downlight for plaster ceiling.
How bout the T5 tube lighting for the L box in the plaster ceiling.
For my 80 feet run of L box, he charged me two points for T5 (that is for the point). He asked me get T5 light myself, but he can install it for me. He was telling me that I need 24 T5 tubes. He can install it for me.
My question is since there is only two points for the T5, which means 12 will connect to point number 1 and the other 12 tubes will be connected to point number 2. So how will he charge me for installation of the T5, ie. RM 20 (RM 10 for each point) or RM 240(RM 10 for each and every tube)?

my contractor charge me RM4 per feet for install the cornice (any type of pattern, not include paint), is it overcharge?

Hi guys, I have plaster ceiling buy my roof starting to leak, some water spots in my plaster ceiling, What to do now? 

I have plaster ceiling in my master bedroom only and as I painted one of my wall dark color, I notice there will be white dust on that wall. After I clean it up, the white dust will appear again after a week. I think there are white dust everywhere in the room, just that it's visible on this wall cause it's dark color. Shouldn't be anything wrong with the paints, cause my other rooms don't have such problem, so I think it's because of the plaster ceiling - maybe the contractor didn't apply sealer?

Is there anyway I can remedy this? My plaster ceiling was already painted to match the other walls in the room.

But there's no problem with other rooms (that do not have plaster ceiling) and I used the same Nippon paint range for these rooms, just that the colors are different. The paint guy do not have to skimp on the paint cause I bought more than enough for him to use. Did you have the same problem too previously? After you apply the sealer, are there anymore white patches on your wall?