there is pros and cons of each design intention. You still need a scupper drain to channel to water on your roof slab to your nearest floor trap. You must not use normal floor trap. you must use something like this

My contractor just put in additional bricks and sink to prevent water leaking...this included extra waterproof and the While thing (no sure what it call) due to when heavy wind blow it back into the roof.




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the white stuff is an adhesive glue or sealant for your flashing. I can't see how big is the flashing sheet coverage. Looking into your picture i assume is until the upper kerb. Well it's not enough. You contractor need to extend the flashing in a single piece to the roof tiles as least 2 feet.

It already 2 inch high from the concreate. and I could see the water sign stop way before hints the white spot after he add the additonal glue thing (like a gums)...
He will not do till if the rain hit again and leaking sign find

that isn't proper water proofing, the proper way is apply to all flat roof and min 150mm up turn skirting with min 2 coats


sample pic of water proofing to balcony using SIKA product

Flashing is a "L" shape thin layer of metal sheet used to cover the gap between vertical & horizontal wall. the best method is as forumer here.to cut the wall with grinding disc and tuck in the bended tip into the wall, nail on to the wall with what either method. then seal the side with silicone or equivalent...



G.I is a coating.. zinc coating. best is to use PPGI(pre-paint colour G.I sheet) better than G.I alone due to its service environment(subject to rain spalsh & sunlight)

It similar like the photo, except I captured from near instead of far point...
SInce it will take him another month to get my house completed, hence still can monitor the outcome

http://www.sika.com/en/competence_for/01_o...rs/e-house.html

I just saw it keep Cycle..

using bricks as kerb is not a ideal way to do it

you are right and it should not be. But in fact it have to be, because the roof concreate are just lay below the wood after the extention.
So a brick is need to be use as foundation

Where is your water going first? If there is ponding on your flat roof then apa solution also no use. Make sure water discharge fast enough first. Then only solve the leak.

Seems like you said when heavy rain the water won't go over the kerb, that means that water is ponding!!! There should not be a layer of water there in the first place. It means that your discharge is under designed. look into that first.

(many contractor, and architects for that matter, don't understand that water discharged needs to be designed. Just because you have a floor trap there does not mean that it is good enough to discharge all the water. it needs to be sized properly. ie- the bigger the flat roof, the larger the discharge)

This post has been edited by Bishop: Apr 30 2011, 02:11 AM

Sorry, may I mistake interpreted the "Kerb"

This is how the pipe the contractor in place, the pipe hole is not facing the sky instead it was 45 degree with under 1inch under the concrete.


WHen I ask him why it not facing the sky so that the water will go much more fast (I guess) instead of like this
Answer from him is
1) Facing sky not meant water will flow fasted as he using 6inch pipe not 4 inch
2) Using this way than the pipe "L" is facing outside not under the concrete or build together with concrete, just imaging if the "L" hidden in the concreate, how deep the concrete layer will be or it will Display in room conner...
[attachmentid=2186203]

So far after the leaking and addional thing done, it not longer leaking. Is this meant I'm safe?


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Not a very elegant solution. Such a large pipe coming down the side of your house.

Anyway the construction is completely wrong. The parapet/kerb/upturn that is now built in bricks should have been casted in concrete together with the flat roof. That was the cause of the leak. Sad to say you are not safe. Different expansion rate of the bricks and concrete will cause it to crack again at a later time. After a while you will probably see a horizontal line where the brick sits on the concrete flat roof and see water stain there.

Actually the awning/metal deck solution that someone suggested earlier would be the safest solution.

Is the place dry after rain or is there still water there ponding after the rain?

Good question. Maybe I sure claim up to see again...

Also, I nothing anyone could have bricks and concrete done together, as concrete need to be dry before bricks could be there, rights? Or maybe I interprete wrongly?


This post has been edited by Jo_da48: Apr 30 2011, 09:45 AM

what bishop mean is the up stand kerb shall be Reinforced Concrete cast together with the slab, not bricks

This post has been edited by skng03: Apr 30 2011, 11:25 AM

Go take a look immediately after rain and see. If there is water ponding then the screeding is not done properly. What that means is the water is not flowing to your discharge. If water is ponding leaks will eventually happen.

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Added on April 30, 2011, 11:55 amThis means there is ponding. there should not be a water sign if the screeding is done properly.

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Added on April 30, 2011, 12:00 pmYep. his contractor has a poor understanding of construction.

This post has been edited by Bishop: Apr 30 2011, 12:00 PM

thanks bishop for highlighting the seriousness of water ponding, i shall request my contractor to look into my balcony water leakage problem

Good...that not water ponding at the area,ofcause it not Dry after rain la...

I was thinking how could I ask the contractor to do the" "L" shape thin layer of metal sheet "

If you want to do L metal sheet (technical term is "flashing") then the solution given by a previous poster is correct.