At Therma Source, we’re committed to making insulation more accessible, affordable, and reliable for Canadians. Whether you’re a contractor working on large-scale developments or a homeowner upgrading your basement, we offer a wide selection of high-quality insulation products at competitive prices, without compromising on performance.

Therma Source is a Canadian-owned and operated distributor specializing in thermal insulation materials. Based in Ontario, we work directly with manufacturers to source a wide range of insulation types — including mineral wool, fibreglass batts, and rigid foam boards, to name a few — from trusted brands around the world.

By maintaining strong supplier relationships and operating with low overhead, we’re able to pass the savings on to you. Our goal is simple: to offer dependable insulation options below retail price.

Competitive pricing — Always lower than retail

Local inventory — Fast fulfillment from our Ontario-based warehouse

Technical knowledge — Product guidance tailored to your project

Contractor support — Bulk ordering, delivery coordination, and reliable supply

Family values, professional service — We treat every project with care and respect