Roof terace

[Billington]

After the storms I have damp in the bedroom ceiling.i have decided the roof terrace needs re grouting,what do use use and how to do it.
Thanks

[calculator]

Why not paint it?! That's the normal approach.

There are specific plastic/rubber paints for terraces, etc. Have a look in Saavedra.

[spitfire58]

Why not paint it?! That's the normal approach.

There are specific plastic/rubber paints for terraces, etc. Have a look in Saavedra.

That would only work if the actual grouting is intact wouldn`t it. Need to check that first & if it is a used terrace they might want the tiles as they are

[Lexeus]

We have a flat concrete roof with the red plasticised paint and commonly get damp in the corners of the ceilings after the storms. It could be repainted but it's not really a major issue for the small numbers of rainy days here.

I imagine that a tiled roof terrace would be a little bit of a nightmare to fix by just re-grouting it, there is always going to be another crack for the water to get in, although of course it can't hurt. For a real water-tight finish there would have needed to be a waterproof membrane fitted under the tiles.

I would guess grout is going to be prone to dry and crack under the hot sun out here, maybe look in Ideal or one of the wholesalers for a product specifically targeted for external use? The general info on the internet is that you are going to want a grout that contains Epoxy or Latex and although it is pricier that will help hold it together. Maybe a cheap alternative would be is standard tile grout mixed with PVA glue?


EDIT: Here is screwfix link to show the additive:
https://www.screwfix.com/p/mapei-latex-plus-white-1-5kg/48884
https://www.amazon.es/Mapei-l%C3%A1tex-Plus-blanco/dp/B00NJSSYWG/ref=sr_1_1?ie=UTF8&qid=1541345444&sr=8-1&keywords=MAPEI+LATEX+PLUS
https://www.screwfix.com/p/mapei-latex-plus-white-6kg/2081x

[spitfire58]

We have a flat concrete roof with the red plasticised paint and commonly get damp in the corners of the ceilings after the storms. It could be repainted but it's not really a major issue for the small numbers of rainy days here.

I imagine that a tiled roof terrace would be a little bit of a nightmare to fix by just re-grouting it, there is always going to be another crack for the water to get in, although of course it can't hurt. For a real water-tight finish there would have needed to be a waterproof membrane fitted under the tiles.

I would guess grout is going to be prone to dry and crack under the hot sun out here, maybe look in Ideal or one of the wholesalers for a product specifically targeted for external use? The general info on the internet is that you are going to want a grout that contains Epoxy or Latex and although it is pricier that will help hold it together. Maybe a cheap alternative would be is standard tile grout mixed with PVA glue?


EDIT: Here is screwfix link to show the additive:
https://www.screwfix.com/p/mapei-latex-plus-white-1-5kg/48884
https://www.amazon.es/Mapei-l%C3%A1tex-Plus-blanco/dp/B00NJSSYWG/ref=sr_1_1?ie=UTF8&qid=1541345444&sr=8-1&keywords=MAPEI+LATEX+PLUS
https://www.screwfix.com/p/mapei-latex-plus-white-6kg/2081x

Good idea Alex. I have a floor of ceramic tiles to lay over a wood floor (in Scotland) & I had also thought of adding PVA to the adhesive to give it more bond. Great minds eh !!! 🤣😂🤣😂

[Lexeus]

We have a flat concrete roof with the red plasticised paint and commonly get damp in the corners of the ceilings after the storms. It could be repainted but it's not really a major issue for the small numbers of rainy days here.

I imagine that a tiled roof terrace would be a little bit of a nightmare to fix by just re-grouting it, there is always going to be another crack for the water to get in, although of course it can't hurt. For a real water-tight finish there would have needed to be a waterproof membrane fitted under the tiles.

I would guess grout is going to be prone to dry and crack under the hot sun out here, maybe look in Ideal or one of the wholesalers for a product specifically targeted for external use? The general info on the internet is that you are going to want a grout that contains Epoxy or Latex and although it is pricier that will help hold it together. Maybe a cheap alternative would be is standard tile grout mixed with PVA glue?


EDIT: Here is screwfix link to show the additive:
https://www.screwfix.com/p/mapei-latex-plus-white-1-5kg/48884
https://www.amazon.es/Mapei-l%C3%A1tex-Plus-blanco/dp/B00NJSSYWG/ref=sr_1_1?ie=UTF8&qid=1541345444&sr=8-1&keywords=MAPEI+LATEX+PLUS
https://www.screwfix.com/p/mapei-latex-plus-white-6kg/2081x

Good idea Alex. I have a floor of ceramic tiles to lay over a wood floor (in Scotland) & I had also thought of adding PVA to the adhesive to give it more bond. Great minds eh !!! 🤣😂🤣😂

What sort of wood floor? Why not take up the wood floor first? If it's laminate it shouldn't be too hard to take up and if it's solid wood then you can sell it!

[spitfire58]

It`s a bit of a mish mash really. It was an extension (dining room) I built onto the existing small kitchen. The kitchen has concrete floor but the extension has normal flooring chipboard then the whole lot was overlaid with laminate. If I was to do it “properly” I should take up the laminate & overlay the chipboard with 1/4 or 1/2 inch ply but I thought that securely screwing down the laminate & roughing up the surface (to give a bond) & then as I said add PVA to a normal tile adhesive would work out as good. What do you think ?