Winter snow, coastal wind and wildfire-smoke soiling are real in British Columbia, and any rooftop solar plan has to take them seriously. Responsible design uses stated site wind and snow-load criteria, appropriate mounting and professional review where applicable. What it never does is call a system 'storm-proof', because no honest installer can promise that.
Design for wind and snow at your site
Wind load and snow load depend on location, exposure, roof height and the local building context. A responsible plan uses recognised site wind and snow-load criteria rather than a generic assumption, and applies professional review and permits where the installation warrants it. The point is to design for the conditions the roof will actually see.
Mounting and attachment
How the array is attached — rails, clamps, roof anchors and the structural path into the roof — is what keeps it in place in high wind and under snow. Mounting method, module selection and attachment together determine behaviour in severe conditions, which is why hardware choices matter more than panel brand alone.
Snow reduces winter production — plan for it
Snow cover and short winter days reduce production; that is normal, and tilt and array design can help snow shed. A realistic production estimate accounts for seasonal variation rather than quoting the best summer month. Customers who expected 'summer numbers' year-round end up disappointed, so the assumption is stated up front.
Wildfire smoke and soiling
Heavy wildfire smoke and ash soiling can reduce output for days or weeks at a time. A realistic estimate acknowledges this, and a cleaning and inspection plan after a heavy smoke or ash event is part of after-sales support where the agreement provides for it.
What to ask
- What site wind and snow-load criteria were used in this design?
- How is the array mounted and attached to my roof?
- Will the system shut down or secure itself in a storm?
- Is post-event inspection part of the service?