0

We bought our house in Fresno, CA new in 2004. After about 4-5 years we noticed the upstairs master shower was leaking as evidenced by damage to ceiling in room directly below it. We contacted the home builder for repair work (in California they warranty all new construction for 10 years by law). Their general maintenance crew did a shower pan test that showed the shower was leaking at the corner where the glass door meets the wall and door well. The glass door has a gutter that runs all the water that falls on the door to this corner. After inspecting the corner we noticed the grout line was cracked, likely from the new house settling. It was unclear if the pan was not installed correctly or if the leak was high enough to get around the pan. The home builder, in consult with the tile subcontractor, decided to clean the grout line and lay new grout. This was done and they then placed a hardy amount of silicone over the repair for good measure. Fast forward another 5 years and the problem has returned but much worse, now I am out of the warranty period and want to repair it myself. I am good at general construction and tile work but have never installed or repaired a shower pan. I removed the glass door framing to get at the grout line and found the silicone they applied during the fix had mostly pealed up and was covered with black mold on the underside. I used a razor blade to remove the old grout which was also dark gray in color and very “rubbery” in texture, no longer tan and hard like this grout usually is. I fear the mold grew up from under the tile and thru the grout line but have never seen that happen before? I’m considering several potential solutions: (1) regrout with high quality epoxy grout and call it good (!?), (2) fill the open grout line with silicone in hopes of a better more flexible seal over time, or (3) start tearing up tile to see see if pan is in good working order and go from there. Option three seems like best long term solution but am I getting in over my head? Thanks in advance for any help or suggestions.enter image description here

enter image description here

  • Thanks user81381 for the input. I was Thinking the same, I think I will do a pan test this week. The last pan test showed it only leaked when water reached near the top of the curb. This is the reason we figured it was the grout crack at the top corner of the curb. The thinking was perhaps water was getting under the grout and routing over the curb into the floor. – DIYWeekender Feb 12 '18 at 0:04
1

once a pan is compromised, its best to replace it. by now it is almost certainly 100% saturated and clearly isnt doing its job. the longer it goes the more damage to the structure it will cause, not to mention mold. the tile in the picture is all square set meaning you may be able to take the tile out about 2 ft above the pan to do a replacement. assuming you can get new tile that matchs the old.

0

A) The gutter on the shower door should not be sloped back to that corner, it should be sloped to the opposite side

B) The curb was not constructed properly because it should have been sloped back toward the shower pan such that any water landing on the top of the curb would roll back in rather than out toward the bathroom floor.

C) The shower pan waterproofing membrane (whatever the method) is supposed to continue up and over the curb and up the wall above the curb, it seems that your enclosure was not waterproofed correctly. I say this because the small amount of settling represented by the crack should not have compromised the waterproof membrane.

I would, unfortunately, recommend tile removal. A "second place" temporary alternative would be your "Option 2", waterproof silicone caulk.

  • Thanks Jimmy for the input. Unfortunately the lighting in my bathroom is not great and my pictures suffered, to be clear the curb does in fact slope back towards the shower drain and not out into the bathroom. As for the fix, I was afraid that would be the answer. Do you think the membrane can be repaired by pulling back just 2-3 rows of tile? I was thinking about resloping the gutter in the other direction as you mention but then when opening the door to get out of the shower water would run all over the bathroom floor. – DIYWeekender Dec 22 '17 at 2:54

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.