To fix minor roof leaks, specifically in the context of the challenges faced in the Vancouver area, you can follow these steps for maintenance and small repairs:

For very minor issues like small cracks in the sealant around vents, you can apply a compatible caulk as a temporary fix. If you identify isolated minor signs, such as a single small water stain without extensive damage, a temporary sealant may be sufficient to stop the intrusion, though it should be monitored closely. For asphalt shingles, minor leaks may involve resealing seams or replacing individual damaged shingles.

Preventative maintenance is also a critical part of addressing minor leaks before they escalate:

1. Gutter Cleaning: Regularly remove leaves and twigs to prevent water backups that cause interior damage.
2. Moss Removal: Safely clear moss with a soft brush and a mild solution, as moss traps moisture and erodes roofing materials. Do not use a pressure washer, as it can damage shingle granules.
3. Flashing and Sealant Checks: Inspect the flashing around chimneys, vents, and skylights for cracks or loose sealant and repair them promptly.
4. Debris Removal: Clear branches and debris after storms to ensure proper drainage.

If the leak involves multiple indicators, persistent dampness, or complex issues like flat roof membrane failures, it is recommended to seek a professional inspection to avoid structural damage or safety risks.