No Bob Villa

04:30AM | 07/16/02
Member Since: 07/15/02
2 lifetime posts

I am attempting to repair part of a tiled shower/bathtub wall where a section of the water-resistant greenboard has to be replaced due to water damage.

Would anyone know if I have to replace the entire wall or can I limit the size of the job by cutting out the damaged tiles-backerbard section and replacing it with a new piece of backerboard and then re-tile with new tiles?

If I can replace just the damaged section, how would I go about treating the joint connections of the new greenboard with the existing backerboard to ensure the best possible water-resitant connection before I begin the re-tile phase?

Thanks in advance for your ideas & suggestions!

No Bob Villa


11:32AM | 07/17/02
Member Since: 11/16/01
301 lifetime posts
Dear NBV,
You do not have to replace the whole wall. Take out the green rock to the nearest joists and tape the joint with the plastic sticky tape. Use the same mortar you would for installing the tile for the joint compound and retile.What alot of people don't realize is the steam heat from the shower will, over time, affect regular wallboard compound. When I tile a bathroom and use green board, I tape all of the joints with mortar. It will effectively seal the porous areas from any moisture damage.

No Bob Villa

03:16PM | 07/17/02
Member Since: 07/15/02
2 lifetime posts

Terrific! Thank you for the fast reply and the good advice!




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