Water Damage Restoration in Markham

The Markham Water Damage Profile: New Builds Fail Differently

Most of Markham was built 1990-present — Cornell, Berczy, Wismer, Greensborough, Box Grove, Cathedraltown, and the newer stretches of Milliken Mills. Newer homes do not leak less than old ones; they leak differently. The water damage patterns we handle across these subdivisions:

• Window and wall flashing failures — the number-one new-build pattern. Water enters behind siding or brick veneer during wind-driven rain and shows up inside 5-10 years later as stained drywall or a soft window sill — often with hidden mold already established in the wall cavity
• Cold joint foundation leaks — the footing-to-wall seam was not properly waterproofed; leaks appear at the basement slab edge during spring melt and heavy rain
• Window well overflow — undersized or clogged well drainage sends water straight through the basement window during summer downpours
• Builder-grade fitting failures — certain PEX clamp and compression fittings from the 2000s construction wave are now failing at 12-15 years, usually inside finished walls
• First-generation equipment failures — original hot water tanks and appliances in 2000-2010 homes are past design life; a 50-gallon tank failure releases its volume plus continuous supply flow until someone shuts the main
• Cantilevered bonus-room freeze-ups — bump-outs over garages lose heat in all directions and freeze supply lines during cold snaps

Unionville and Thornhill Heritage Properties

The older side of Markham — Unionville's Main Street area and the heritage pockets of Thornhill — runs on the opposite playbook: aging supply plumbing, original drain stacks, stone and early-concrete foundations with rising damp, and complex old rooflines. These homes get the careful version of our process: surgical demolition that preserves original materials, asbestos testing before any pre-1990 material is disturbed, and drying approaches that protect plaster and original millwork.

Tarion Warranty Documentation on Newer Markham Homes

A meaningful share of Markham water damage traces to construction defects on homes still inside Tarion warranty windows — two years for building-envelope water penetration, seven for major structural defects. The distinction between "construction defect" and "homeowner maintenance" decides whether Tarion responds, so our assessment documents the cause precisely: flashing installed wrong versus caulking aged out, cold joint never waterproofed versus grading changed by the homeowner. You pursue the warranty claim and the insurance claim on parallel tracks, and our documentation supports both.

How a Markham Call Runs

Dispatch within five minutes of your call, on-site in 20-35 minutes, source control and category classification per IICRC S500, extraction within the first hour, then structural drying with daily moisture verification and full reconstruction. One crew, one project manager, one invoice — billed directly to your insurer on covered claims, with the claims process handled for you.

Markham Areas We Cover

All of Markham: Thornhill, German Mills, Milliken Mills, Unionville, Markville, Berczy, Wismer, Cornell, Greensborough, Box Grove, Cathedraltown, Cachet, Angus Glen, Victoria Square, and the 404-corridor employment lands. We also cover adjacent Richmond Hill and northeast Scarborough from the same dispatch.