Discuss Roof terrace in the Tile Adhesive and Grout at Tilers Forum; I have a 50m2 roof terrasse. The grout has become permeable and rainwater is leaking into the cellar below (this is because the original builder "forgot" to put any sealant ...
I have a 50m2 roof terrasse. The grout has become permeable and rainwater is leaking into the cellar below (this is because the original builder "forgot" to put any sealant on top of the concrete base??).
I can't remove all the tiles and start from scratch, so I simply need to renew the grout. Is it favourite to remove ALL the old grout? What is the best way of doing this? What is the most effective water resistant grout on the market? Thankyou.
thanks but afraid this is not possible; 50m2 is a a big area and the thickness of the cement between tile and terrasse floor is almost 15cm.
However, if you fancy quoting for the job I can send you a photo?
thats not a good move as it will creat more issues and finding a waterproof membrane that will garantee over tiles will be hard you may have weight probs
job realy needs to be viewed but the only grout that is waterproof would be epoxy but the job needs to be seen by a qualified tiler to make the call on weather it can be done and i recomend epoxy be installed by a tradie hope this helps
if the substrate has been soaked and all the grout is cracking and letting in water to the point its coming through to the cellar below re grouting will not solve this issue i would say it needs to come up you may also have to sort the substrate again
I'm very impressed & appreciative of all the advice. Thankyou. Removing 50m2 x 15cm. is a pretty hefty job & I would then have to purchase new tiles. The terrasse is integral to the house and extends from the living room. If there is any way I can resolve this other than a complete re-hash I would prefer to do so. If the seepage is not filtering through the grout then where is the water coming from? There are no holes in the tiles and there are 2 drains at the balcony/terrasse front which discharge most of the rainwater so it must be entering the grout & working its way down through the substrate to the concrete roof/floor of the cellar? We took out one complete line of tiles at the front and the substrate was very wet.
Hi Branleur, I have just read through this thread. I would like to know what is the substrate?is it tiled directly onto concrete? I have done quite a lot of balconies, and agree with comments above. Tanking is advisable, better still a decoupling membrane. Balconies are subjected to the extremes of weather, intense heat / frost etc. Expansion, contraction is always a problem. I am concerned if this installation is leakiing, how much damage has been done to the adhesive. Prolonged water ingress will destroy most adhesives over time, leading to de-lamination eventually. I hope there is a easier fix for you, I can't think of one sorry
Tilers Forums is the UK's largest wall and floor tiling forum. Advice is provided free of charge to all users. Tilers Forums does not take responsibility for any loss or damage caused due to following advice found on this forum. All wall and floor tiling should be carried out by a qualified wall and floor tiler. Views expressed on this forum are of the users and not Tilers Forums. Views expressed on this tiling forum are of the contributor only and not the forum as a whole. Not all views should be taken as fact but simply the opinion of the person posting. Readers are reminded to seek professional advice before undertaking any wall and floor tiling project.