Wall because the dampness is on the bottom of the wall and there is moss growing on the bottom 3 feet of it.

Waterproof additive to the base layer of plaster would keep water from the exterior seeping into the walls, but how do i keep the water seeping through the bricks from damaging my interior walls?

Anyone have contact for person who good at finding root cause for inter-floor leakage? Location in Penang island.

Hi, anyone can comment on the waterproofing for new additional bathroom back to back to the existing bath? As there will be some hacking works on the wall, how is it going to affect the waterproofing on the existing bathroom? need to redo waterproofing at existing bathroom?

Yes. Need to redo the waterproofing at the places you hack.

i will only be hacking on the wall, floor waterproofing has to redo as well? what types of waterproofing is better?

walls need water proofing also.

since the area of waterproofing is small..........just fill up the gap between the place you hack and the water pipe.....and a bit on the surface to level it. i would just use pye aquaplug. it is sold in small can.......1kg size.

u r going to raise the toilet floor level, this will allow water to seep out to your living / bed room

Your existing toilet flow to the soil pipe already has a T-joint.

To add another T-joint, you need to raise the platform quite high for allowance for the new joint.

By the way, I dont think is easy to add the new joint to the existing soil pipe. The plumber may need to use heat to soften the existing soil pipe to push it into the new joint. Take into consideration that you may find leakage/smell entering your existing toilet if the plumber dont do it properly.

I dont think is neccessary to do any water proofing for existing toilet as the plumber can drill a hole of the size of the new pvc pipe like how cooker hood is installed for air to escape to outside the house.

waterproofing for wall usually only apply for 300mm upturn? or need full wall height?

ok thanks. btw, is it risky to do it this way? how high is the possibility of future water leakage issue?

water will seep out into the room even if i construct a kicker and apply with waterproofing on it?

it wills top the water, but wouldn't it be too tall to step into (er... i mean, onto) the toilet floor with the added kicker?

u mean the joint allowance like this?

how much allowance for new joint? 200mm?

noted, thanks for your advice.

what did u mean?

i plan to do it like this.

oh, ok. that's good. u have an extra step outside there. i never thought of that. LOL

well.......
i take waterproofing seriously.........i water proof up to 6 feet. double layer at least.

I cant tell the allowance as it depends on the outlet to the soil pipe.

But it is never adviseable to have t joints sitting next to each other as there will be no room for adjustment if mistakes are made.

I have to caution you that the work of inserting the soil pipe into the new t involve shaking and pulling side ways. During the process, it may cause leaking around the joint of the soil pipe near the ceiling in the long run or even worst, it may dislodged due to poor workmanship of the developer. Things are weird sometimes ... if you dont touch it, nothing happens .. and vice versa.

By the way, are you are doing additional toilet only or to include bath? Was wondering why water proofing?

On the lighter note ... it reminds me of my childhood time when I used the raised type bucket toilet.

i see, thanks a lot. previously, i did casually ask my engineer friend, he told me no problem. need to check with him again i will consider the risk involved before i made my mind.

i plan to add 1 new bathroom including wc, basin and bath. because there will be some hacking works on the wall, so i think that the wall have to redo waterproof and i am not sure whether that the vibration from hacking works will damage the waterproofing on the floor?

This post has been edited by Agent 45: Jan 7 2019, 05:09 PM