How to stop water seeping in sunroom?

[upgrades]

Photo # 1 Photo # 2Photo # 3Photo # 4

Water seeping through from outside to the sunroom inside (via a cracked tiles).

- Photo # 1 is the backyard and is a tiled area. Under the tiles, its concrete. Sunroom is sitting on this tiled area.
- Photo # 2 is the sunroom.
- Photo # 4 is where the water sometimes sits and grout outside sunroom are worn out.

After the sunroom upgrade (Insulated wall and roof installation), water was entering from under the Sunroom's insulated wall and I used silicone outside and inside to seal the sunroom. There is a gutter about 2m away from the sliding door. The slope is slightly towards the Sunroom door hence the water during heavy rain sits near the door and slowly runs parallel to the door and make its way to the gutter. After the sealing, water did not enter the sunroom from under the wall. But now the water comes via this cracked tile (shown in Photo # 3 and # 5) inside the sunroom. It made a decent size puddle inside even though it looks a very small crack. Its definitely rain water and I get the impression that water is travelling via the outside grouts to inside tiles, not sure.

Question:

1) Undo n redo the tiles and fixing the slope will require a lot of effort\$$. Can the slope be fixed with reasonable priced alternative?

2) If slope can't be fixed with not-so expensive solution, how can I waterproof the outside tiled area so water can not penetrate the tiles\grouts and travel inside?

Appreciate your help. TIA.

[JacobZ]

Hi @upgrades,

This Davco Sanitized Tile And Grout Sealer is a similar product that would work out a bit cheaper.

Jacob

[upgrades]

Ok. I have done step 1, 2 n 3. Only need to fix the cracked tile now. Shouldn't take too long now. 

Waiting for rain now to test, lol.

[upgrades]

OK, after performing step 1, 2 and 3 (cleaning, removing the grout, re-grouting n sealing the grouts), I didn't fix the cracked tile (photo # 5) yet, I was hoping that water shouldn't get in as there was no visible way of it from the surface to seep through but when it rained continuously for 3-4 days, first 2 days there was no water inside but on a 3rd day, water started seeping through again from the cracked tile and it was a lot.

In a nutshell, all the grouts are done, there is no water coming through the frame but water is still seeping from this cracked tile. I wonder if I fix the cracked tile, will it fix the issue or start leaking from another area? Perplexed as to if there is no water visibly coming through the frame and it's entry is unknown, where else it can come from and how to fix it?

Thanks a lot again.

[EricL]

Hello @upgrades 

Fixing the broken tile could solve the issue. But you also have to remember that water will find the weakest point in your assembly and come out from there. So if there are any weak points in the grout or another section of your tile that is not secure, water will come out through there. I can only advise changing the broken tile and observing once again for any leaks when the rain comes again.

If you need further assistance, please let us know.

Eric

[upgrades]

Thanks. As you suggested, I will fix the broken tile using PC 11 epoxy paste and observe.
https://www.bunnings.com.au/pc-11-56g-white-epoxy-paste_p1560098