I am facing a leaking common area bathroom from my neighbor above in a standard 1000sqft apartment. Contractor advise to do chemical PU injection from below (IE my unit), I was wondering if this solution is better than doing the epoxy membrane from the toilet above?

Also the price quoted was RM1850 for one bathroom, not sure if this is in line with the market?

Advice and opinions are all welcome.

that's about right in the market pricing, but insist on a 6-month or 1-yr warranty period

not to sure who foots the bill in this case as i am not familiar with strata act

and yes, they have to do from your unit as doing it from your neighbor unit will damage the tile finishing, which will incur more cost

depends on your budget, the type of leak, size and etc

the cheapest would be using waterproof paint, while the most expensive would be laying an additional waterproof membrane

if water tank then check if the water comes from the water tank or piping leaks

it doesnt seem to be from rain water leaks as i see roof on top of the water tank from your picture

what i meant was comparing the effectiveness of PU injection from below VS epoxy coat from above. Epoxy coat does not damage tiles since it is applied on the tile surface only.

my concern is the PU injection from below may cause situation whereby the water is stopped from flowing down, but may dwell in the cracks and crevices plugged by the PU and over time cause other problems, or worse the water will just divert to another area of my unit, because water always finds its way in time. Or later on (maybe years later) new micro cracks appear and cause the leak again.

oh, i didnt read properly. yeah, ur concern is correct, it may & might mitigate to other place

i've faced it before. but so far only 2 out of around 50+ leaks i have done

that 2 is due to no waterproofing done during construction and i have advised the client to redo waterproofing

on my defense, the secondary leaks only happen after the 12 month warranty period i give out and it happened at new points, not at the area that has been injected with pu

I'm not sure the size of the leak but there is only one patch of it from the ceiling beneath, i believe the leak is from the cracks from the concrete roof, any idea how much is the price to do the membrane per sgft and any recommendations? do they fix the plaster ceiling beneath as well?

Just did a comparison. PU injection RM1850, epoxy flake rm850 and addresses the problem from the root cause (ie from the leaking bathroom itself). With this price/benefit ratio, can someone share what is the advantages of PU that cause more than 2x the price while solving the same problem?

Of course the scenario being addressed here is limited to bathroom leaking, other scenarios maybe PU might be more convincing.

Diy pouring 2 bottle of pye krek seal, less than rm40.

Not sure if serious comment or troll, but this product looks like its only used for locally sealing known cracks. Also, identifying the leaks is probably better done by expert.

One advantage I can think of for PU injection is if you meet an uncooperative neighbor upstairs and have no choice but to solve the problem from below.

Serious. I just pour it to all the grout and let it seep in to the grout.

And it stop the leak. Why bother to find the crack when the product will find the crack for you lol

This is the reason of the dampness on my ceiling,






Other water tank got no such issue, probably because of the shelter?



Any idea what I can do about it?

i think this one is under developer / JMB resposibility already

best way is to do waterproofing from the top as there are a few possible water entry point - either from the RC plinth - slab corners OR from the anchor bolts that was drilled into the concrete slab, damaging the waterproofing layer / membrane

just wondering how should water proofing be done? during my place renovation, they sapu the floor and wall (up to 1 feet high) with the black tar thingy..
now got water seeping and water marks already.

but i think the possible reason could be due to they use cement as grouting instead of proper grout powder..their reason was use white grout will turn yellow later..so use cement wont obvious (i found grey coloured grout later so i now i know they lied).

what are the remediation can i do now? regrouting without replacing tiles will work?

1 feet is too low.
I do mine 5 feet and double layer waterproof cement.
Grout I use cement mixed with pye waterpruf additive.

Hi,
I would like a recommendation on which toilet and balcony waterproofing product to use.

Also if the product can be used on bare bricks, it would be ideal.

Hi! Everyone, do you hear or deal this company before?

http://nanog.com.my

https://youtu.be/BkDrdpqe7Zw

This post has been edited by petlu28: Dec 25 2018, 04:16 PM

sika seal.........

not on bare bricks............but on top of the cement rendering of bare bricks. the cement used to render the bare bricks can add cement additive like pye waterpruf for overkill

I'm mainly asking to waterproof my external walls that are exposed to rain most of the time.
Also is it recommended to paint over pye waterproofed surfaces?
This is due to rising damp in the internal walls.

Wall?
You will need to check the roof, ceiling and window nearby for leak first.
Fix that.

And why is the wall bare brick? Not even a cement layer rendering?

And pye waterproofed surface means what? A layer of elastomeric paint or cement with pye waterpruf additive or something else?

The general rule of painting is a clean and dry surface, a suitable primer if not painted before. Then paint.

If got paint before on the wall, can paint over it with new paint provided the surface is clean and dry, the paint is of same type( water based on water based, acrylic on acrylic etc etc...)