Chimney Waterproofing with Alsan Flashing in Ajax

While working in the same Ajax neighbourhood, a customer asked one of our specialists to inspect a chimney that had been rebuilt by another contractor. At first glance, the chimney looked solid. However, we noticed small cracks forming at the top. These cracks, if ignored, would eventually allow water to penetrate, leading to damaged bricks and weakened mortar joints within just a few years.

Our Proposed Solution

We recommended waterproofing the top of the chimney using Alsan Flashing by Soprema, a product we trust and often use on flat roofs. Alsan Flashing is a highly elastic, durable membrane that resists cracks and movements caused by temperature changes. When applied correctly, it provides a strong, watertight barrier, protecting the chimney from moisture infiltration and extending its lifespan.

Important Application Notes

Alsan Flashing should be applied in warm weather for the best adhesion. However, Soprema also manufactures a winter-grade version that can be used safely in colder conditions. This makes it a versatile option for year-round protection in Ontario’s climate.

Protect Your Chimney Today

If you are unsure about your chimney’s condition, don’t wait until water damage occurs. Schedule a professional chimney inspection with The Roof Whisperer. Our detailed assessment helps you catch problems early and avoid costly repairs later.

👉 Call us today to book your chimney assessment.