Main cause of slab leaking generally is water ponding.

So go check after rain is there water pond there? Even the slightest water pond will cause leaking.

As long as the water runoff is smooth. Not likely will happen leaking. Have to solve the water pond issue first if any. If not no matter what u do. Still likely will leak because water will find its own way down.

This post has been edited by novblaze: Mar 19 2021, 01:13 PM

Better if you make the flat roof not flat.
Flat is the main problem

Or better just find another place to stay.
Leaking is a never ending problem.

You also stay in talam house ?

sorry i think i misunderstood everyone.. not tanki bocor.. nothing wrong with tanki. its lately has been heavy rain and after rain stop the water on the floor suppose to flow to the hole and into the drain.. somehow not all the water flow into the hole so end up the water sip into the simen floor when dry up so the wall of the simen floor become bubble / watermark... this is the issue la

check already the contractor say need to do water proofing on the simen floor. somehow after rain when it dries up the water sip into the simen floor and end up the wall become bubble / water mark kind.... long term not good for the floor so water proofing is the only solution.. just that water proofing got many types thats why my ask is which is the best?

oh... so how is it? i am looking at long term.... yes u are right i ask many contractor they say no need membrane trouch just apply coating base ( 2 / 3 layer) cheaper options. i tried that 5 yrs ago and yes it solve temp but it comes back again and every 5 yrs i have to do it?? so who to trust????

Ts tumpang tered

If tsngki leak, need to replace new one or can just tampal it?

Tukar tangki

My favourite

I love to eat the white part first.

Water proofing is not just apply water proof onto the floor. Not that simple one 😆

The contractor should redo the cement floor so that water runs off easily into the drain hole.
The water proofing mixture is applied under the cement floor.

Long term

Build a proper tiled roof over the flat concrete roof.

Once and for all. Permanent solution.

I assume you stay in a link house.

Look at your neighbors. I'm sure all of them have same issue like yours.
And I'm sure some of them build a tiled roof over it. Look around.

The place I stay now in sg petani also have this issue. Flat concrete roof. Leak.
Most of us just get a tiled roof.

All these membrane torch la, sika la, water proffing la can only last you few years. And it's not cheap

Who recommended this short cut charge expensive contractor?

Lol.

use epoxy

So confirm no water stagnant there? Just water seep into Crack?

You need to properly cement screed the floor to properly flow the water into the drain. Then only water proof the surface. If not no matter what material water proof will still leak. Like I say. Water will find its own way. If the water runoff is done well enough. No need water proof also not likely will leak.

This post has been edited by novblaze: Mar 19 2021, 01:51 PM

your water tank area how big ? if ur concrete slab there cracking then fix the crack first la before put regular waterproof coating ... my house water tank area just apply waterproof coating 1 time then never apply again. but i have a question, why ur water tank area is wet ? only wet should be from rain right ? and there's water trap there for rain water/tangki water to flow down. it should not linger there long enough to seep into the crack.

menbrane i put at the concrete slab above the back rooms that is fully extended out. the good thing about membrane slab, if done correctly water will never seep below it, not from the side not from anywhere. the bad thing if they didnt do it properly, from above u see ur membrane no issue, but below water seeping u wont know until too late. so the ppl doing it must have good experience doing it

noisy la sial.


what I did to fix my roof slab leaking (car porch) was to buy pentens T200 waterproofing elastomeric paint, problem solved.

Get those with PU foam
Quiet
Absorb heat.

Clear up the dust.
Apply 2 layers of pentens t200
Repeat in every 2-3 years.

The additional roof doesn't replace the concrete slab. it just covers it up. Also, you need to re-apply the paint every few years. I have tried both methods.

Nothing to do with the roof.. there is no roof there is an open area where my tanki is and tanki not leaking all good just that when raining the floor wet flow into the hole but for some reason left some water sip into the floor so end up it becomes bubble or water stain in long run. Been staying for 15 yrs never do anything this is what happen.. so now looking to do something not sure next 10 yrs or so what will happen to the cement floor....