Still waiting heavy rain since completed (Monday) till now...only few small drop yesterday at my area

Your water proofing cover only the concrete slab? what about the beam side attached to the slab? (the 90degree connection vertical)

The Indo make a slope around 20-30degree, where the end is brick.

aiyah while wait for the rains drop why not try to spray water and test first ......u're is leaking problems not water splashing problem mah, right?

try to block the water outflow hole and let the water cover the whole concrete slabs that u wanted to test at least half an inch high then u leave it for half an hour if leak u will already know immediately why wait? but pls ensure the water is not drain out to have a accurate results ...... this method is the fastest way ...... just sharing .....

correct, since you are doing already, if end is brick why not sapu water proofing on the brick also? maybe up to 10" height from slope..... to avoid the water splashing on your wall cause leak ma......

For the car pourche, it only a single brick which already max high of water proof , because it just inherit from the old tile roof.
As for the back concreate yard ( 2nd Floor), it on 1.5 brick, if more than that, then the water will already out from roof direct to the outside and not even could go so high at all...

last two day it does rain on the area, but just few drop which can cause anything

---

Added on July 29, 2011, 2:28 pmAn early raining, which break my hope as the leaking not all solved.

Car pource: Original 3 place have water fall type, now only have 1 place, which believe they didn't actually open up the roof tile and check the zink area
Room: Original leaking room solved, but now another room leaking , could be when they putting those roof time not in proper way.

NOw have to wait for two week for them to come over to fix, which delay my plastec ceiling work too


This post has been edited by Jo_da48: Jul 29 2011, 02:28 PM

Never ending... One after another leaking came out
After all the rest of leaking result by putting extra water pipe, water proofing, blocked with root tile (verticate) to prevent wind direction....

Today another new leaking found, after check and it a big joke.
This water go through root tile, aluminum layer than out through Zink
And end of zink didn't have any link to other placer, hence the water just drop through my ceiling as show on picture...
I can't fixed it except I clim up to the roof top from outside as inside been block by zink / alumimin


Guess I found the possiable roof cause. Yesterday was heavy rain on our area and almost whole night was raining, hence this morning drop to the house and found that the was not further leaking sign at all, hence suspect due to wind blow.
Take a look from external and compared the rest of house, noticed that the "Triangre" roof like missing a pc, which may the hole look big compared to other house...will buy one and ask the contractor fix it up.


I'm also spend time checking the car pourche area about leaking as well, hence also see the possiable area as well, as that if water falled fast, it will not goto when full to the gutter instead it overflow to opposite which not proper been tiles on...
Hope this could be address after Raya and the paint work could start as well.

Idea Outcome



This post has been edited by Jo_da48: Feb 9 2012, 03:52 PM

After 6 months down the road nightmare back again as the Flat roof area leaking again as could saw water mark at the plaster ceiling

Yesterday have re-apply water proofying (DIY) using PenTens...cross finger and hope it solve out.

for flat roof leaking why dont u try PU Grouting

most of the leaking on construction project using this method , ..i'm not a supplier by the way.

http://www.patentroofing.com.sg/PU_grouting.htm

This post has been edited by sn4: Feb 18 2012, 11:23 AM

that so many way or suggest,just that which is realiable or need redo after few years???
If I have choice I will use Roof tiles instead of Concreate roof

if builder quality suck, roof can also have lots of problem.

For protection against rain, I'd say metaldeck roofing is the best because it has less joints.
As far as I know, there is no permanent cure for cracked concrete roof.
Consider doing a layer of metaldecking over it.

Cement roof tiles depend on the overlap between tiles and the roof pitch, whch must be at least 20 degrees. Other factors can also cause leakage - flashings, structure sagging, cracked tiles, etc.

P.S.
There is one method of repairing leakage whereby holes are drilled at close intervals on the concrete slab. A liquid is pumped under high pressure into the holes. The liquid finds its way into the pores of the concrete, expands into a foam material and clogs up the pores thus preventing leakage through the slab.

I don't know what material that's called. I believe it is still in the market.
It worked to stop leakage through my bathroom floor slab so that I did not have to hack out all the tiles and redo the waterproofing.

This post has been edited by tehtmc: Feb 18 2012, 11:58 AM

its called PU grouting

[quote=sn4,Feb 18 2012, 12:37 PM]its called PU grouting

[/quote]

OK, polyurethane the foam packing material.
But I'm not sure whether it will work with deep cracks.[
[/quote]

This post has been edited by tehtmc: Feb 18 2012, 12:53 PM

work fine with our 400mm thick wall here

What 400mm thick wall?
We are talking about a car porch roof which is under direct sun and rain.

i'm talking about my wall here at this project, 400mm thick, since u doubt it effectiveness with deep crack

your roof slab probably only 150-200mm thick, so no worries

This post has been edited by sn4: Feb 18 2012, 01:03 PM

Car porch roof slabs are typically 100-125mm thick. Wouldn't a thinner slab be more difficult to waterproof than an thicker slab?

with injection i think its not a concern, the foam will filled up the crack, no matter how deep the crack, its pressurized the chemical and seal all

my 2 cents

The question is also, how long will it long under outdoor conditions?
The same job can be done using sealant or flexible coatings but they don't last.