May 18, 2010 3:51 pm
Some 12 months ago our upstairs ensuite began leaking, cause - faulty pipe, insurance paid for repairs which included tiler jack hammering out tiles and waterproofing just shower area and retiling. After 11 months ensuite now leaking again, tiler admitted was his fault and fully refunded our money.
My problem is
1. Should I just let tradesman seal the floor with some silicone and hope for the best, he tells me work guaranteed for 7 yrs at cost of $550. My gut feeling
2. Have floor completely taken up, waterproof all floor and behind pipes in shower recess and then retile?
Would value comments
Re: Short cut or other way? to waterproof ensuite2
May 18, 2010 8:19 pm
It depends really on where the new leak is coming from, the pipes, or from the undertile sealing. A plumber with bathroom experience is the best adviser. You see, if it is a leaking pipe joint, it would be pointless to hack up the floor.
If the shower floor is at fault, it is a grim choice, but I think the only effective way is to take up the floor tiles, and the first course or 2 of wall tiles. The shower recess glass may need to be removed. It gets progressively worse.
Then you need a plumber to put in a puddle flange (leak control flange) in the shower drain, if not there already. For that some of the undertile cement screed will need to be chipped out around it, and maybe a hole cut in the ceiling directly under it as well if the PVC pipes have to be cut and joined .
I have had to do all that just now.
After that a good painted on waterproofing membrane is needed on the undertile screed, carried down into the puddle flange. This membrane should be done over to the floor wall joints also, and then up the wall as far as possible. You MUST have a bond-breaker tape at the floor-wall joint. The plumber or tiler should know.
If a pipe is leaking, there will have to be all sorts of mayhem and demolition looking for it.
Sorry it is not better news.
Re: Short cut or other way? to waterproof ensuite3
May 18, 2010 8:37 pm
Thanks for your opinion, you have just confirmed what I suspected. Taps have been tested, not leaking, the waterproof sealing the incompetent tiler put in has broken down so I know all the floor tiling has to be taken up and replaced after the floor has been properly sealed.
Have been very surprised? that the 2 tradesmen I have sought quotes from didn't think it necessary to waterproof to Australian Standards i.e. as stated in your message, even I figured it out after I downloaded the information from a website. I have learnt a lot about bathrooms in the last couple of weeks.
thanks for that tip, its something else I am going to have to insist on.
You MUST have a bond-breaker tape at the floor-wall joint.
Re: Short cut or other way? to waterproof ensuite4
May 18, 2010 9:06 pm
The Aust Stds only got changed in the last few years and are still catching on I thinK. Waterproofing membrane when properly done has been shown by the CSIRO to be effective, replacing the old technique of a shower tray buried in the cement screed undertile. Like anything though there are lots of ways for it to go wrong.
The main things to watch for when the job is done for you are that the undertile surface is scraped fairly smooth before coating with the waterproof membrane , as that will give a better seal , and that the wall to floor joint is properly treated with bond breaker tape.
This tape is an obscure concept which not all how-to-do-its mention. The tape is polyester about 75 mm wide, with an adhesive strip in the middle. When applying it, the adhesive strip is pressed in to the corner of the joint, and the the edge parts of the tape are then thoroughly coated and bedded into waterproofing compound, 2 coats.
The idea is that when joint movement occurs, that will preferentially happen under the adhesive tape part, and not disturb the overlying waterproofing. Crafty.
Edit GeoffW1: The following lines were not posted here by me, and don't represent my opinion
Google is our friend
please refrain from posting hyperlinks
Re: Short cut or other way? to waterproof ensuite6
May 20, 2010 7:49 pm
Thanks again and apologies for the link, now removed.
I've sent you a PM with the links that were removed, apparently the way we should do it. I've asked the moderator for a clarification, but so far no reply
Re: Short cut or other way? to waterproof ensuite7
May 26, 2010 8:53 pm
What's wrong with links? Maybe you could link me to the term of use that states that's a bad idea. Whats the point of a forum if you can't point people in the right location? Surely 'googling' it (even though that's an advertisement itself) ends up doing the same thing? Maybe, I'm just naive...
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