Not every project goes smoothly. My biggest fail was during a kitchen update when I tried to install a new sink on my own.
I thought it would be simple. I measured, bought the sink and started cutting. The problem was I miscalculated by half an inch. The sink did not fit and I ended up damaging the countertop.
What should have been a quick upgrade turned into a bigger expense because I had to replace the whole counter. The lesson I learned was always measure carefully and sometimes it is better to hire a pro.
Mistakes happen and every DIYer has a story like this. The important thing is learning and laughing about it later.
Final thought: Renovation fails are part of the journey. What is the worst DIY mistake you have made?