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Getting Your Chimney and Masonry Ready for a Sudbury Winter

Fall is the best time to inspect and repair your chimney and exterior masonry before freeze-thaw cycles set in. Here is what Greater Sudbury homeowners should check before the snow arrives.

In Greater Sudbury, the window between the end of summer and the first hard frost is short. Once temperatures start swinging below zero at night, any water sitting in cracked mortar or open masonry joints begins to freeze and expand. That expansion is what turns a small crack into a serious repair, and what turns a manageable chimney issue into a full rebuild.

The single most important thing you can do before winter is have your chimney inspected. Look at the mortar joints between the bricks. If the mortar is recessed, crumbling, or missing in spots, water will get in. A repointing job done in September costs a fraction of what a chimney repair costs after a winter of freeze-thaw damage.

Check the chimney crown, which is the concrete or mortar cap that covers the top of the chimney stack. Cracks in the crown are one of the most common causes of water infiltration. Even a hairline crack can allow enough moisture in to cause significant damage over a Sudbury winter. If the crown is cracked, it should be repaired or replaced before freeze-up.

While you are looking at the chimney, check the flashing, which is the metal seal where the chimney meets the roof. Lifted or corroded flashing lets water run down behind the chimney and into the wall cavity. This kind of water damage is often invisible until it has already caused rot or mould inside the wall.

Beyond the chimney, walk around your home and look at any exposed brick or stone. Parging on foundation walls should be intact with no cracks or hollow spots. Stone steps and walkways should be checked for loose or heaving stones, since that problem only gets worse once frost gets underneath them.

The good news is that most of these issues are straightforward to fix when caught in the fall. Repointing, crown repairs, and parging are all jobs that can be completed in a day or two. Waiting until spring means living with the damage all winter and often paying more to fix what the winter made worse.

If you are not sure what to look for, A1 Creative Masonry offers site visits throughout Greater Sudbury and the surrounding area. We will give you an honest assessment of what needs attention now and what can wait. Contact us before the season changes.

A1 Creative Masonry, Greater Sudbury

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