Gutter guard questions, answered straight.

The honest answer depends on which guard. A flat-screen guard can collect ice against the mesh when wet leaves freeze before they shed; the expanding ice pries the fasteners out of the fascia. A forward-pitched micro-mesh guard drains ice melt off the leading edge before it refreezes, which is the specific design response to Niagara freeze-thaw cycling. St. Catharines crosses 0 degrees Celsius dozens of times per winter; that design choice is what separates a guard that survives many winters from one that needs redoing within a few years.

On a two-storey home under heavy mature maple canopy, Port Dalhousie, Glenridge, most of the mature-tree streets in St. Catharines, a micro-mesh install typically pays back in three to five years in cleaning avoided, plus overflow damage prevented. On a single-storey home with light tree cover and a willing homeowner, a regular cleaning plan may actually be the cheaper path. The payback math depends on your specific tree cover and roof height.

A properly installed aluminum micro-mesh guard on sound fascia, with an annual inspection, should last fifteen to twenty years. The mesh itself is the durable component, aluminum does not rust and the weave does not collapse under debris load. The failure mode to watch for is fasteners installed in soft or water-damaged fascia: a guard on deteriorated wood will pull away in three to four years regardless of mesh quality. That is why the fascia check before any install is not optional.

Nearly, but not completely. A micro-mesh guard eliminates the leaf cleans most St. Catharines homes need twice a year. What it does not eliminate is shingle grit that accumulates on the mesh surface over time. Once a year, a short visit to brush off surface debris and run water through the downspouts keeps the system at full capacity. That is the trade: two full cleans replaced by one quick annual check.

September to mid-October is the ideal window in Niagara. The leaves have not started dropping yet, the eavestrough is clean and dry, and the guard is in place before the heavy October leaf drop. Spring is the second-best window once the maple keys are down and before the next fall. Mid-November or later adds a clean-out step first because the troughs are full of wet leaf material, which adds time and cost to the install.

Yes. The old guard comes off before a new one goes on: the eavestrough underneath is cleaned and checked, the old fastener holes and any damage to the front lip are looked at, and the removal shows as its own line on the quote. Leaving old screens in place under a new system defeats the point, because the debris and the water path stay exactly where they were. If the old guard was screwed through the shingles, that is the moment to check the roof edge too.