I was talking with a pool company and the quotes of course changed based on different material. Ok about 3000 baht more a sqm if using #12 re-bar as opposed to #9. Seems like a lot of money for re-bar? Is this normal. I of course would think heavy is better but is it needed?

About 35,000 extra if i want footings also not required as no pools in my village have footings and none seem to have any issues. Also if i want an overflow design that would add almost a extra 100,000 to the price, The pool would be L shaped (no curves) 44sqm 2m-1.5m deep.

Yankee

I don't know where you live but a good rule of thumb is to seek the advice of an engineer when it comes to installing a swimming pool. Water, concrete & steel are heavy and the soil/sub-soil may not be capable of supporting a heavy load especially in the rainy season.

about 3000 baht more a sqm if using #12 re-bar as opposed to #9. Seems like a lot of money for re-bar? Is this normal. I of course would think heavy is better but is it needed?

notwithstanding the fact that they seem to take you for a ride with the surcharge another fact is that 9mm rebar for pool walls and floor is... chickenwire.

it depends of course on the "density" how the rebar is used. 9mm diameter in squares of 15cm makes the reinforced concrete stronger than 15mm in squares of 30cm. without knowing how (see above) the steel is laid nobody can give you adequate advice.

about 3000 baht more a sqm if using #12 re-bar as opposed to #9. Seems like a lot of money for re-bar? Is this normal. I of course would think heavy is better but is it needed?

notwithstanding the fact that they seem to take you for a ride with the surcharge another fact is that 9mm rebar for pool walls and floor is... chickenwire.

it depends of course on the "density" how the rebar is used. 9mm diameter in squares of 15cm makes the reinforced concrete stronger than 15mm in squares of 30cm. without knowing how (see above) the steel is laid nobody can give you adequate advice.

I am not sure it is chicken wire? I looked at the chart and #9 looks to be 1.128" 4.303lbs per ft & #12 1.5" and 6.424lbs per ft (not sure if this is 100% correct).....I am not sure how the steel is laid as this would be a difficult question with the language barrier. the floor is in two parts a minimum 5cm then 20 cm on top of that. The walls are 15cm....

Yankee

I don't know where you live but a good rule of thumb is to seek the advice of an engineer when it comes to installing a swimming pool. Water, concrete & steel are heavy and the soil/sub-soil may not be capable of supporting a heavy load especially in the rainy season.

The advice is booth will work. But it seems that many customers request a heavier build (it makes them more comfortable i guess) therefore the options. I am actually happy that they are open about different builds and up front with the costs.

about 3000 baht more a sqm if using #12 re-bar as opposed to #9. Seems like a lot of money for re-bar? Is this normal. I of course would think heavy is better but is it needed?

notwithstanding the fact that they seem to take you for a ride with the surcharge another fact is that 9mm rebar for pool walls and floor is... chickenwire.

it depends of course on the "density" how the rebar is used. 9mm diameter in squares of 15cm makes the reinforced concrete stronger than 15mm in squares of 30cm. without knowing how (see above) the steel is laid nobody can give you adequate advice.

I am not sure it is chicken wire? I looked at the chart and #9 looks to be 1.128" 4.303lbs per ft & #12 1.5" and 6.424lbs per ft (not sure if this is 100% correct).....I am not sure how the steel is laid as this would be a difficult question with the language barrier. the floor is in two parts a minimum 5cm then 20 cm on top of that. The walls are 15cm....

"#9 looks to be 1.128" 4.303lbs per ft & #12 1.5" i don't comment on barbaric and uncivilised technical info

"this would be a difficult question" not difficult at all. draw some squares on a piece of paper and ask "sentimat?" or write "cm?" in a square. sidenote: if you have that big communication problems my advice is to look for another builder.

"the floor is in two parts a minimum 5cm then 20 cm on top of that. The walls are 15cm..." the 5cm are not a part of the bottom but the form. 15cm thick walls are (under most soil conditions) to thin! recommed thickness = 20-25cm plus at least 12mm, better 15mm steel. an optimal alternative would be 25cm and two layers of 9mm. but that is basically too much to ask for from most of Thai pool builders. exceptions prove the rule.

"i want an overflow design that would add almost a extra 100,000 to the price" a fair price. an overflow system beats a skimmer in each and every respect.

"about 3000 baht more a sqm if using #12 re-bar as opposed to #9" per m² pool surface or per m² concrete? a huge difference! in your case the difference between the two is more than double (93 / 44m²).