Continue from https://forum.lowyat.net/topic/4374789/all

Hi guys, you ask me anything of Water leaking / Waterproofing. The more complicated the question is, the better

Waterproofing is not an easy topic. Sometime the leaking situation is very tricky and complicated. Sometimes its very straightforward.

Just ask me anything and i will try my best to answer when i have time. And i like to learn from others too.

The more challenge the water leaking waterproofing situation is, the more adrenaline i get smile.gif Especially those who appointed few contractors to solve waterproofing water leaking problems and yet still failed to rectify the water leaking waterproofing.


Those common water leaking i can share about are below:
1. Waterproofing Problem / Waterproofing Materials
2. Water leaking / Plumbing (toilet, roof slab, wall concrete slab)
3. Concrete crack repair solution.

In general, There are few types of waterproofing chemical
1. Liquid applied PU waterproofing membrane
2. Cementitious waterproofing coating
3. Chemical PU injection waterproofing system
4. Exposed waterproofing system
5. Self adhesive waterproofing system

Nowdays there are a few improvement in waterproofing technology such as
Crystallization effect, epoxy coating, Silicone waterproofing, water repellent coating etc.


I believe Water leaking or Waterproofing problem is the most nightmare defects rectification work compare other defects. Worse still some contractors proposed wrong method solving the leaking matter or some contractor disappear after owner engage their service and many nightmare stories that i heard.

I will be very glad to share some of my experiences rectifying water leaking problems or waterproofing problems and share my knowledge the best solution to rectify it smile.gif

First of all, apologize for my English and please focus on my knowledge sharing here smile.gif





Share me what is your water leaking & waterproofing problem here. Learn together and lets solve it.

This post has been edited by Daang: Jun 1 2020, 06:41 PM

Reserve for typical waterproofing problem to discuss =)

This post has been edited by Daang: Jun 1 2020, 06:40 PM

reserve for typical technical drawing waterproofing =)

This post has been edited by Daang: Jun 1 2020, 06:40 PM

reserve

Nightmare to deal with... 🙏🏻

How much do you charge for a typical toilet waterproof work.

Retiling, can the old tiles be salvaged?

This post has been edited by Zwean: Jun 2 2020, 01:25 AM

hi Daang, thanks for taking over.

to everyone, i was the owner of the last thread on water-proofing. water proofing is a kind of problem that you don't know or even think about when it didn't happen. life goes on, business as usual. but when it did occur, it really can caused u to feel extremely frustrating and sleepless night. think of it like the feeling of shitting, if the feeling didn't come, u wont think about it. when it did come and especially at a time u least expected it, it become a situation.

since i have abit knowledge about it, i opened that thread as an 'educational' and part 'personal-hobby-project' ...

but i have since left Malaysia to cari makan down south. this hobby/project thread has proofed to be overwhelmed and i can't handle the many queries since i am no longer based here. with heavy heart i have to close that thread. i also received many pm's and felt sorry i was unable to offer much support.

one day TS (Daang) and i talked and suddenly this topic on the water leaking thread that i did few years back came about in our discussion. i am happy that Daang is willing to re-start this meaningful and useful thread.

Daang and i have known each other for more than a decade. he knows his stuff in water-proofing and generous enough to re-start this thread.... i encourage everyone that have any problem in this area, feel free to discuss in this thread so everyone can share and hopefully solve this toxic problem if it ever happen to your home/facilities.

GO GO GO Daang.... thank you for continuing and taking on this topic......

[quote=moonhowler,Jun 2 2020, 04:49 PM]
hi Daang, thanks for taking over.

It is an honor!


[quote=Zwean,Jun 2 2020, 01:25 AM]How much do you charge for a typical toilet waterproof work.

Retiling, can the old tiles be salvaged?

[/quote]

Rate is subject to the condition of the toilet area.
A proper investigation needed to identify the water leaking issue and using the right method to solve it for long lasting

I guess many home owners experiences the water leaking was fix by contractors but the water leaking comes back after days, weeks, months....

Basically these are the method type of waterproofing repairs at toilet area depending the structural toilet floor condition.

1. PU injection chemical (no hacking)
2. Epoxy grout between the tiles joint (no hacking)
3. Epoxy flake coating (no hacking)
4. Water repellent chemical between the tiles joint (no hacking)
5. Hacking and redo everything new. New waterproofing, new screeding, new tiles.

To each method type waterproofing, there are advantages and disadvantages.

_____________________________________________________________________________________________

Your question regarding retiling is absolutely necessary to change if hollow sound can be heard on tiles
It must be replace as soon as possible because over time as moisture / water will be able penetrating into tiles and structural concrete. This will create big problem in future.

The present of moisture / water over time in concrete will result concrete deterioration that will encourage mold growth, bacteria growth and steel corrosion.
The concrete deterioration means weaker concrete strength and will eventually lead to structure concrete failure.
Structure concrete failure means massive crack inside the concrete.

That is the reason we always say be careful purchasing old house as massive repair needed to be done. Water leaking problem. Waterproofing problem. Crack everywhere.

mold growth

This post has been edited by Daang: Jun 2 2020, 08:35 PM

What are the pros and cons of the methods below? Can you Explain like I'm 5 please?


1. PU injection chemical (no hacking)
2. Epoxy grout between the tiles joint (no hacking)
3. Epoxy flake coating (no hacking)
4. Water repellent chemical between the tiles joint (no hacking)
5. Hacking and redo everything new. New waterproofing, new screeding, new tiles.

1. PU injection chemical (no hacking)

Advantage
Fast job,
no hacking concrete,
filling up the concrete crack structure (inside the concrete)
effective and the most used at site construction repair.

Disadvantage
messy and dirty,
there is chance the water leaking find new exit point,
home owner require to patch up the new plaster ceiling.

2. Epoxy grout between the tiles joint (no hacking)

Advantage
Fast job,
no hacking concrete,
filling up the minor crack joint between the tiles joint surface (top surface)

Disadvantage
It did not solve the big crack inside the concrete.
If big crack exist inside concrete, the leaking will come back because epoxy grout mostly treated the top surface part.
The additional movement & vibration concrete, the epoxy grout will wear and tear out.
Many public unaware contractors using tiles joint filler or cement grout filler instead of epoxy grout filler.

3. Epoxy flake coating (no hacking)

advantage
no hacking concrete
instantly cover your dirty floor tiles
Create many design patterns

Disadvantage
Cover up existing beautiful tiles,
time consuming as it takes 2 – 3 days to fully cured
it did not solve concrete structure crack (inside the concrete)


4. Water repellent chemical between the tiles joint (no hacking)
Advantage
Fast job
no hacking
easily DIY yourself
economical

Disadvantage
The leaking coming back soon, the water repellent wont last long.

5. Hacking and redo everything new. New waterproofing, new screeding, new tiles.

advantage

The one time solution that solve everything.
Water leaking solved
concrete structure strengthens

Disadvantage
time consuming and may take up many days to complete
expensive
messy and noisy


The concrete structure is just like the center of human body. If the center of human body is not healed and let it slowly deteriorated (concrete structure crack). The whole thing will crumble soon and major fix repair is require.

currently no leaking but I think I want to apply waterproofing on my bathroom floor tiles lines. What is your advice on the method?

The upper floor shared bathroom ceiling has water mark during heavy rain (double storey house). What is the recommended method to repair it? Any recommended contact in klang valley?

Nice, every condo owner needs to know this

Hi sifus, i'm glad to have found this thread.

As you see in the image, i have a wall (between neighbour) that is moist at the bottom. Neighbour terrace house is actually on a higher level (about 3 feet higher). Our street is on a slope. Wondering if there's any long-term solution that can be applied?

(Sorry I did not read the previous thread - not sure if similar problem has been addressed.)

Thanks in advance.

Firstly need to identify the water leaking source, since you mention heavy rain only leaking,
1) it could be clogged drain that resulting water ponding, then overflow rainwater leak to the shared bathroom (this is not waterproofing problem)
2) if waterproofing problem, the need to study and access the condition. i) concrete surface (crack?) ii) the side of corner area (angle fillet) iii) does it have enough rainwater downpipe? iv) old waterproofing wear out?

You can PM for recommended waterproofing water leaking contact in klang valley. This will be good for lowyat waterproofing case study

From behind
1) If you could somehow access the concrete wall behind, apply with fast setting mortar cement, best to hack alittle deep (U shape) into concrete wall before applying fast setting mortar cement. The bonding strength will be stronger.
2) Another option is applying epoxy sealer around the area.

From front
1) use PU grouting injection chemical to fill the porosity crack concrete.
2) many ppl scrap the painting wall / plaster wall and apply with epoxy coating or waterproofing coating. Then repainting back. It works and you wont see leaking patches however there is a possibility in future growth of mold inside the concrete as the water / moisture will still be there

Hi,

My zinc roof at my balcony kinda leaks badly when it rains heavily. Beneath the zinc roof, there are plaster ceiling and they are already brownish in colour - not sure if it's due to the leakage or simply the paint is not good enough.

One part of the plaster ceiling eventually fell off and I could now take a peek at the leaks when it rains and seems like it's mainly leaking at the roof joints / "paku".

Do you know what to do to fix this permanently? Apply silicone on the paku area? Or something else?

Hey, thanks for the advice.

Unfortunately i won't be able to access from behind as it is neighbour's wall.

OK, will do the work from front. Ya, I think the future issue with the trapped moist will be an issue. sigh... But better than let it "rot" like now.

The nail should be at the top section of ~ zinc which shouldn't leak, unless it is heavy rain, whereby inclination of the roof is not steep enough to drain out the water fast.

There is a kind of tape or black soil stuff that can seal off the hole, which is easily available in hardware shop. Just tell them you want to seal off the nail hole of your zinc.

Hi Daang and sifus,

My masterbedroom bathroom is leaking to the lower floor. already did waterproofing using the solution but only last a few months and now starts to leak again. At the bottom of the stairs, there're water dripping from above.
Already asked quotation from a contractor. He suggested to do the whole bathroom.
What I'm not agree with him is the time taken. His proposal schedule:
1. hacking - 4 days for a 8x5.5' bathroom
2. Water proofing - 4 days( 2 days to cure and 2 days testing)
3. Tiling 4 days.

My question:
Is it really 4 days to do the water proofing?

I need shorter days coz I cannot take longer leave days.

Thanks

Is it altogether 12 days? That would be too long for a bathroom waterproofing work. But 4 days for the whole work that would be usually the case as hacking and tiling takes time, waterproofing needs time to cure as well. Water ponding test does require days but you do not need to be there to monitor.