anybody done waterproffing for your roof / tanki area before?? My hse starting to see cracks on the simen slaps and end up the wall got water stains / some kind of bubble on the paint...

i was browsing thru website, there is many options... i saw in fb also that got one company use hydro mambrane torch technology can tahan lazak up to 10 yrs compare to cheaper option of using coating base... true or not i not sure anyone can advise?

This post has been edited by achong09: Mar 19 2021, 09:05 PM

your tanki there got use concrete floor err?

tot what so canggih name, its bitumen sheet
not sure which is cheaper, but my contractor use this

they did 2 layer with 1 day drying in between, then cover with 1 layer cement after drying for 2 days.

step 1: check if tangki got bocor

step 2: check if nearby pipes got bocor

rather than waterproofing that area, 1st thing is you gotta fix the leak

😨😨😨

Some says flat roof not suitable for our climate.

i did membrane torch for my house ....the good contractors will tell u it is overkill n not required for house and u decide haha ....

i decided screw it ..just put it so i dont have to worry

expensive thing can buy almost 2 iphones

make good the slab surface and apply few coats of surface type waterproof coating will do..

Don't DIY. I used the Dunlop bitument thing to fix a small leak. But that damn thing never dries. On a hot day it'll melt and slowly flow down.

Find the leak, if it's the tangki or the pipe first

Roof top ah ... constant sun - bitumen waterproofing membrane.

slanted roof kan ada

Flat concrete slab in our weather is a really bodo design. The only way to get rid of leaks permanently is to put another zinc roof over the concrete slab.

If flat roof use sika 107

only used pentes t200.
2 years+ now, still no leak

i used this Pentens fleseal t-200 for my concrete roof leaking, so far no issue already.

Why your house so many problem?

Must be talam made house.

non shrink, ponding test, then cementitious waterproof (cheaper) or membrane waterproof.

membrane waterproof has 2 kinds, one you just apply and leave to dry.

the other you'll have to finish with a blowtorch.

the blowtorch one is better but you'll probably not like the price.

cementitious waterproofing not more than rm200.

you can even buy the sealing tape and waterproofing powder and do it yourself.

but remember you'll have to do the non shrink grouting first.

okay, i typed too much.

if you're up for the challenge..

I recently did for my house.

Using Aliphatic Polyurea, around RM7000...

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....

We r not the expert so how we know if do well or not.. as if when they do we stand beside them make sure they do well is it? 😢😢 its all base on trust lo.. anyway my question is use the cheaper option of applying coating is better or choose the expensive option of membrane torch method? Objective is long term no need to bother after 10/15 yrs....

Fix the crack before everything else

Sheet Membrane is good but it's effectiveness depends almost entirely on the workmanship. If cincai Bangla simply hantam, it's actually worse than liquid coating.

Sometimes contractor try to cut cost put more sand and less cement to make concrete slab. In the end thw slab cracked and no tahan long.
Got part for water to drain out? Small side drain?

This contractor is chinese but worker is foreign no choice la i cannot ask him to change worker right? Secondly not sure if crack causes it but contractor say better do it either apply membrane if got budget or go cheaper option of applying coating...

Question is which is better? I am looking at long term la and well money spend.. did coating 5 yrs ago and now prob persists dont want spend money on coating and next 5 yrs spend again la...

You fix here, other spot show up. It's the reality facing a lot of concrete roof owner. My uncle fed up doing repair for his shop lot until finally erected steel rooftop. Final blow which fixed every water leak.

Surely foreign workers la.. But if the contractor is good, their workers can follow his instruction and do nicely. If simply hamtam it might even leak less than a year. Remember ask him if he got warranty you or not.

If you want long term, you need to first fix the crack. Got budget can ask him to do pu injection. Once confirm no crack after water ponding only start to apply waterproofing. Membrane is good, but your house roof so small, and detailing at corner and penetration is essential which is why I said workmanship is vital. Liquid coating easy to apply and less problem during installation. Downside is if your roof crack sikit, the waterproofing crack sekali also where your Membrane can cover cracks up to a certain width. If normal 20x80 terrace house, I suggest go liquid. Cheaper and you no need worry much.

Also, check your irrigation. If water stuck at some corner everytime it rains, fix it. If water doesn't pond, you're 90% less likely to have to deal with leaking

sika

or pentens

Done some research actually both method also ok depend on individual budget / preference but if look for long term membrane can last than apply liquid coating... i done liquid coating 5 yrs before now prob come back headache if go for liquid again next 5 yrs headache again so i rather spend abit more get it settled once and for all and sleep in peace...

How big is the area and yr budget ? For a peace of mind, membrane waterproofing. Done that to my kitchen concrete slab more than 2 years ago. Cost me RM2.6k for an area of 22' x 7'.

You headache because it cracked, not because liquid coating failed.

Wah cut throat

In the end what method did you end up using, if this had been fixed at all?
I am facing the same situation and pondering what is next..

polyurea man. even pentagon uses it to line its walls

is there any small plant grow at the joint btw walls and flooring? is so, likely water seepage on this area.

plant need water and sun light to grow

I came to the same conclusion.