What to do about a bubble behind tap in waterproofing?

[Milly3]

Hi just wanting to know what to do about a bubble behind my tap in my waterproofing? 
Well I cut it out and continued on with the 2nd coat and am not sure if I should put another bit of tap and waterproof again or what to do? Thanks in advance

[MitchellMc]

Welcome to the Bunnings Workshop community @Milly3. It's terrific to have you join us, and many thanks for your question about waterproofing.

Typically, waterproofing must be done in one continuous coat. A repair or cutout section breaks that continuous layer. Adding an additional layer over the top doesn't necessarily fix the issue, and many licensed waterproofers would not repair a penetrated waterproofing layer; rather, they'd remove it all. The repair might be possible, but that's a question best posed to the waterproofer who will be signing off on your installation for insurance purposes and to ensure it complies with codes.

Remember that only trained professionals who currently hold an Australian Waterproofing License can install waterproofing. Once the job is done, they must provide a statement of compliance.

Please let me know if you have any questions.

Mitchell