What Actually Separates Thinning From Reduction?
One is subtle, the other isn't. Thinning takes out selected branches from inside the crown so wind and light pass through more easily, and from the curb the tree barely looks different afterward. Reduction is the visible one - actual height or spread comes off, typically because something has grown in too close to a structure, a wire, or the neighbour's fence.
Why Bother Thinning A Tree That Looks Fine?
Because less surface area means less for the wind to grab, which is exactly what lowers the odds of a limb - or the whole tree - failing in the next storm. Cheaper and far less disruptive than dealing with what happens if nobody thins it first.
Is Reduction Just Another Word For Topping?
The confusion is common, but the two aren't in the same category. Topping chops branches down to bare stubs, and what grows back is a thicket of weakly attached shoots that ends up being a worse hazard than what was there originally. A reduction cut, done properly, always stops at a lateral branch big enough to keep growing in the old branch's place - smaller tree, same structural integrity.
Does This Kind Of Work Suit A Tight Riverdale Lot?
Frequently, yes - more so than a straight removal would. Bringing a canopy back off a shared fence line can solve the actual problem without giving up the shade or the privacy that came with the tree in the first place.