Etobicoke homes run everything from cast iron and galvanized steel in older postwar bungalows to copper and PEX in newer builds and high-rise condo buildings near the lake, and the repair depends on what's actually behind the wall. A cracked or rusted-through section of cast iron usually gets cut out and replaced with a new fitting rather than patched, since a patch on rusted iron rarely holds. Copper with a pinhole leak, common after years of exposure to Etobicoke's moderately hard water, gets a section removed and rejoined with a soldered or compression fitting. PEX lines are simpler to repair: we cut back to good pipe and reconnect with a crimp.
Frozen pipes need a different approach. We use pipe-thawing equipment to bring a frozen section back up to temperature safely, then repair or replace whatever split when the ice inside expanded. Whatever the pipe is made of, we shut off the water at the main valve before any repair starts, so the fix happens on a dry line instead of a live one.