Diamond Home Services logo
Diamond Home ServicesServing Toronto & the GTA
24 HOUR RESPONSE GUARANTEED

Roof Replacement in Markham

Professional roof replacement in Markham — 24 hour response, licensed & insured.

Call (437) 475-2233Request a quote
24 hour response
Licensed & insured
OEM parts on the truck

When a roof reaches the end of its life in Markham, a proper replacement means more than tearing off shingles. We strip to deck, replace rotted sheathing, upgrade underlayment and ice-and-water shield, and re-flash every penetration. The result is a 25–50 year roof, not a cosmetic recover.

Why roof replacement matters in Markham

Full Tear-Off Matters

Layering new shingles over old traps heat, hides deck rot, and voids most manufacturer warranties. We tear off to deck every time.

Real Underlayment

Ice-and-water shield along eaves, valleys, and around every penetration is the difference between a 15-year roof and a 40-year roof in Markham.

Ventilation Sizing

Under-ventilated attics cook shingles and grow mould. We measure intake and exhaust and correct undersized systems as part of the job.

Our roof replacement process

  1. 1

    On-Site Assessment

    We walk the exterior in Markham, document current condition with photos, and identify every failure point before quoting.

  2. 2

    Written Quote

    You get an itemized estimate — parts, labour, timeline — before any work starts. No surprises.

  3. 3

    Professional Repair

    Our crews use manufacturer-approved materials and industry-standard techniques. Every job is fully insured.

  4. 4

    Cleanup & Verify

    We haul away debris, sweep the work area, and walk the finished job with you before signing off.

  5. 5

    Warranty

    Every job in Markham carries a written labour warranty and full manufacturer coverage on materials.

Common findings in Markham

  • Rotted deck sheathing under old valleys
  • Improperly sized attic ventilation
  • Missing ice-and-water shield at eaves
  • Old three-tab shingles well past useful life

What you get

Real Craftsmanship

Experienced tradespeople in Markham — not day labour — on every job.

Fair, Upfront Pricing

Written quotes before we start. No day-of surprises.

Peace Of Mind

Licensed, insured, and warrantied. If something isn't right, we come back.

FAQ

How long does a replacement take?

Most single-family homes in Markham are torn off and re-roofed in 1–3 days.

What brands do you install?

GAF, IKO, BP, Owens Corning, and Malarkey — matched to your budget and warranty preference.

Do you offer financing?

Yes, through third-party lenders with terms up to 120 months.

Book your roof replacement today

24 HOUR RESPONSE GUARANTEED — call now to lock in a slot in Markham.

Call (437) 475-2233

More Markham services

Roof Replacement in Markham neighborhoods

Roof Replacement in nearby cities