my case is leak of unknown point. so i use a paint brush to paint thin layer on the floor and a few feet of the wall.

bathroom size about 2meter X 4meter...... use about 1 litre.

your case is quite clearly the floor with emphasis on the edge between floor and wall.....common place where technique of applying waterproof cement fails.

Received the item.
According to instruction, its shall apply several coat in wet and dont leave too long between each coating.

Any issue if I leave a thick coat for a day? then drain the access? Will be become a thick layer on top that hard to remove?

I think the don’t leave too long between each coating idea is to keep the surface wet with the solution so the surface can absorb as much as it can.

From my experience it takes a very long time to dry....

It actually doesn’t dry, it gets absorbed into the surface. I don’t experience any film or layer of material on top after the surface doesn’t feel wet or slippery.

Well, your floor, method of application is up to you. If my experience is true then it probably means the method of application is very forgiving.

Maybe drain excess not more than a few hours....perhaps leaving for a day is too excessive haha.



This post has been edited by slimey: Apr 6 2021, 09:54 PM

Just bought a new house. There's a floor roof with a room one-level below. What's a good waterproofing method since I'll be converting that floor roof into a balcony?

if there are tiles on the floor of the balcony......then cementitious waterproofing method is the choice. need to ensure proper slope for water runoff and drainage of the water

No tiles. Just flat concrete roof. Already growing mold. So probably need to hack 1-2" deep and re-cement. Since going to hack the floor, I want to do waterproofing right.

hi, not sure if this is the correct place to ask.

1) im facing leakage of water from the roof of my car porch when i switch on the air-con only, not when raining. How can I solve this?

2) Beside, same car porch, water leaking in between my car porch and awning when raining.

3) water flowing out from the kitchen sink is very very slow. Previously, the plumber said maybe the piping underground got problem hence he used some gas/air to clear the pipe temporary. the condition was solved for few minutes and the issue came back until now. Do I need to rebuild the whole piping?


Can anyone provide me some suggestion? My previous contractor was the worst of all and I have to stop him before burning out my money.

I noticed that there was a leak downstairs from my first floor toilet, i have engaged a few contractors to check and fix and the problem is still not solved. There is no one using the toilet since its a guest room, i only go in to wash the toilet and noticed the leakage.

I have tested to determine if its a tile waterproof or internal piping issue by turning on the stopper (after few weeks of non usage / non cleaning), within a day, there will be leak to the bottom ceiling.

One of the contractor claimed there is a crack in the concrete upon inspection from below, another claimed there is a crack in the drainage hole. A couple of them just don't contact me anymore after inspection despite promising a quotation.

One of the contractor tried waterproofing the floor tiles and still leaking. Another contractor suggested pulling new pipes from the ceiling (no hacking of tiles).

Appreciate any thoughts on this matter, if its a truly internal piping issue or other possibility.

House (and toilet) is newly renovated for about three years.

Most likely is pipe leaks inside the wall.
Need to hack the wall to check.

For number 1, maybe just install a new outflow piping for the aircond. I think there is not economical to check old aircond outflow piping... aircond outflow pipe may also be stuck with jellish substance after long usage years

For number 2, probably the seal between the awning and car porch concrete have give way, remove and reseal it will do

For number 3, have you try the simplest plunger and wire pipe cleaner to try to clear it... these tool can be gotten from Mr.DIY or hardware shop cheaply and at least solve ourself first... it it does not work, you will only then consider repiping

Just to clarify, you mention "I have tested to determine if its a tile waterproof or internal piping issue by turning on the stopper (after few weeks of non usage / non cleaning), within a day, there will be leak to the bottom ceiling." Just to be specific on the stopper, you are referring to what? My understanding is that if you close the valve for the toilet (whole toilet no water even if you turn on the tap), there is no leakage, but once you turn it back on, even if you do not use the toilet, there is leak?

Hey Shifus,

Recently I've spent a huge sum of money to replace all the old cement roof tiles of mine to new Monier ones, to mitigate small leaks and to prepare for a planned new ceiling (17k MYR).

The contractor in charge did such a sh**ty job that now a few of my rooms are practically raining when heavy rain is in occurrence. My ceilings are all completely drenched. I have since ended my relationship with the prior contractor (Paid only 8k and ended contract) and are now consulting a new one which recommends either aluminium foil or zinc sheet to be installed under the current roof tiles.

Should I agree with this ? Please advice me as i want to prepare to redo my ceiling ASAP.

Home is 1.5k sqft.

Aluminium sheet installation quote = 1.7k
Zinc sheet installation quote = 2.5k

I don't see how's that going to stop the leak. That is heat reduction and most likely to move the drench location to new spot.

During raining those two materials will produce pistol shooting like sound. Worst is during heavy thunderstorm .... machine gun shooting sound.

During the day, the heat in the house is like inside a sauna room.

I think your problem is not only due to poor workmanship but the low gradient of the roof to prevent a quick flow of rain water.

Is it possible to take some photos of the complete roof and close shot (zoom)

This situation is really stressing me out, if what options do I have other than the metal sheets?

These are the pictures of the new roof:

From the photos, it looks ok except the cement to seal the gaps is not neat and smooth.

Sometime during heavy rain and strong wind, the tiles will lift slightly and rain water will seep in and flow through the truss to differentt locations. The leak at one place doesnt mean the leak is from that part of the roof tile.

I notice your unit is an endlot. Is the side of the tiles has any covering ? Rain water can also seap through the gaps.

Checking a bad leak is only good during heavy rain and I will tell the contractor the possible areas. So far everything is good.

What about your neighbour ?



Is there a gutter indicated red ? A blockage can cause overflow and water flowing inside.

This post has been edited by mini orchard: Aug 26 2021, 08:21 PM

The patching job is so bad. I think it's cheap then...

Neighbour has no leakage whatsover, the leak in my house is actually so bad this is my current ceiling condition:



Any advice on how to solve my issues?

I think it need quite a large volume of rainwater leak to create the ceiling condition and I suspect is the ovetflow gutter.

I suggest you engage an Indon guy to check on the gutter first. Ask him to take photos before and after.

Since the ceiling board need to be replaced, I suggest to remove it also. Is also easier to check for leaking when it rain.

Replacing the entire new roof tiles wont solve your problem.

This post has been edited by mini orchard: Aug 26 2021, 09:22 PM

The ceiling image you show it is at the front part... of your house... living area right?.. the first picture roof tiles is the back portion of the roof tiles or front portion?

The gutter session that mini orchard circled, does it correspond to the leaking? Is it located on top of the ceiling?