Totally agree with this: Just went through something similar myself. Ordered metal roofing sheets online because the price looked great, but didn't...

- Learned the hard way tile roofs aren't totally maintenance-free... moss buildup was sneaky. - Tried diluted bleach once, regretted it—roof looked du...

Totally agree on the flashing—sealants were a quick fix for me too, but didn't last. Also, check if your bathroom fan vents properly outside. Mine was...