About

Manalco Contractors Ltd. is a Canadian exterior renovation company with over 50 years of experience. Founded in 1975, Manalco has grown from an aluminum siding business into a full-service contractor specializing in cladding, windows, doors, railings, soffit, fascia, eavestrough systems, and complete building envelope solutions.

With offices in Ajax and Ottawa, Manalco serves homeowners, builders, and developers across the Greater Toronto Area, Durham Region, and the Ottawa Valley. The company is known for reliable workmanship, responsive service, and durable materials that add long-term value.

Manalco’s licensed and insured crews work on both residential and low-rise commercial projects, delivering consistent results backed by certifications from Tarion, RenoMark, and regional home builder associations.

We service homeowners, builders, and commercial developers—delivering exterior solutions that perform, from curb appeal to full envelope protection.