QUOTE(hackwire @ Mar 5 2011, 02:07 PM)
i think that's the one.. usually how does the contractor come out with the price . what we should be aware of when they quote. i believe material and work force should be itemized .
materials should be the structures like galvanized metal and the cover sheet such as polycarbonates or acrylic sheet. how bout silicone glue? we need to be double aware the type of silicone glue use too. Some are not durable .
this is what`s going on on contractor`s costing regime........
1) material cost... say RM 2000.00
2) how long does it take to finish.. from order material to installtion... say 10days.. and my average cost is say RM 5k per month so divide it...
3) plus how much margin I want.... taking into consideration that how many people are doing it(competitor) + how tedious/difficult the job is......
4) so, as easy, they divide the total cost by area so you get say RM 25 psf....
5) other variables.... eg. how cerewet the house owner is... cut price after nego n job done.... ask to do extra more but unwilling to pay
hope it helps....
on the silicon issue, like I mentioned to many forumers here before.. it is best to follow the contractors to hardware store where you ask the local hardware shop boss to recommend you the best of value added goods.......
p/s I open hardware shop too.. so I know this..... "tuan rumah want cheap price.... so I give him cheap goods laa...... "