Roofing services
in London, Ontario

London, Ontario
N6P 1V4

Phone : 519-871-7966

Fax : 519-641-4765

All kinds of roofing in London, Ontario

Portman Roofing Ltd. is a roofing company based in London, Ontario servicing the Southwestern Ontario Region. Our experienced roofing installers will install or repair any shingled roof as well as slate and cedar shake roofs, metal roofs or composite specialty roofs. We work on new constructions roofs, renovations and re-roofing for residential and commercial projects.

Portman Roofing Ltd. is certified by North America’s largest roofing manufacturer and can offer a 50 year non-prorated warranty against manufacturers’ defects. This offers our customers one of the highest quality warranties in the roofing industry today. We also offer siding, soffit, fascia, eaves trough, window and door installations with the same great quality installations as our roofing.

Accredited bisiness TD canada trust financing services GAF

Key danger signal of a failing Roof

1. Leakage in Attic After Wind-Driven Rain
Possible cause: Leaky or inadequate shingle underlayment or deteriorated flashing
2. Blistering and/or Peeling of Interior and/or Exterior paint
Possible cause: Excessive temperature or high humidity due to poor attic ventilation... >>>


Your roof is your home’s first line of defense against the elements.  The sun, wind, rain, snow and sleet can all wear your roof down over time.  That’s why it is important to make sure your roof and roofing materials are properly. >>>


  • Fiberglass Shingles
  • Timberline Shingles
  • Slate Shingles
  • Metal Roofing
  • Cedar Shingles

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