The use of a reputable firm such as Makinson d’Apice is highly recommended. However, make sure you;
- ensure they disclose any conflict of interest (as it will not be uncommon for strata law firms to be representing your agent on other matters, and
- step out the process to you regarding what methods of approval are required under the Act in your state (you do not want a case to fall over in the future due to not having the correct approvals to commence action – this will include resolutions to obtain advice as well, not just commencing action)
Also you will need to ensure your building report outlines the cause off the membrane failure. The 10 year warranty will likely be on the failure of the product used (manufacturers warranty) however if the issue was with the poor/incorrect application of the membrane by the contractors this may have a shorter warranty (builders/contractors warranty).