Castle Continues Strategic Growth with Addition of AM Exterior Supply

Castle Building Centres Group Ltd. is pleased to welcome AM Exterior Supply to its growing network of independent building material and specialty dealers across Canada.

Established in 1956, AM Exterior Supply operates across multiple Ontario locations, including Owen Sound, Collingwood, Gravenhurst, London, and Kitchener. Owned by Roger Haviland, Melanie Haviland, Mike Argue, and Andy Kamrath, the business brings decades of industry expertise and a strong regional presence to the Castle network.

Specializing in exterior building products, AM Exterior Supply offers a comprehensive range of building materials. With ambitious growth objectives, the decision to join Castle reflects a strategic move to strengthen purchasing capabilities, streamline supplier relationships, and support long-term expansion.

AM Exterior Supply is a significant addition to Castle. With its multi-location footprint, the organization delivers substantial purchasing volume and expanded opportunity, strengthening the Group’s position and accelerating its strategic growth.

“AM Group Exteriors is a well-established exterior building supply company operating across multiple regions in Ontario,” said the Ownership team. “As we expanded into retail, aligning with Castle to support our continued growth made perfect sense.”

As part of the Castle network, AM Exterior Supply will benefit from enhanced buying power, shared expertise, and a collaborative community of independent retailers, while continuing to grow its footprint across Ontario.

“With a strong presence across multiple Ontario communities, AM Exterior Supply represents the type of business that contributes meaningfully at both a local and regional level. We are pleased to welcome them to the Castle family.” Ken Jenkins, President & CEO