How do I waterproof the joists under my bathroom floor?
I recently decided to replace the floor tiles in my bathroom and found that there had been a leak under the shower. This has meant that the bathroom T&G chip boards have rotted away because of water damage and need to be replaced.
I have also noticed that the floor joists have a little bit of wet rot because of the leak. This has been addressed by using Ronseal Wet Rot wood hardener and filler on the joists.
I want to know if i should and how i should protect the joists against future leaks? The 2 options that i have seen after doing a little research are:
- Cover top of joist with flashing tape such as Bostik flashband
- Paint top of joist with black bitumen
Should i do any of these or would this introduce further problems? Do i have any other options?