4 Reasons Why Water Could Be Getting in Your Chimney

Water damage can be a nightmare for homeowners potentially leading to rotting or moulding of interior framing, insulation and drywall. If you suspect water is coming into your home via your chimney, it is highly advised to hire a licensed masonry contractor to inspect the condition of your chimney. Here are some of the most common reasons water could be entering your home from the chimney.

Absence of a Rain Cap

Flue liners come in 3 standard sizes on Chimneys in the Ottawa area and rain caps are specially built to fit right on each of these standard liners to prevent rain from entering your chimney via the flue. A rain cap will not only protect your damper from rusting, it will also help keep birds and other wildlife out of your chimney due to its mesh encasing.

Damaged Chimney Cap

The chimney cap is the most important part of the chimney system for protecting the chimney from snow and rain. A chimney cap made of brick or concrete frequently cracks allowing water to penetrate directly into the chimney. Freeze thaw cycles will continue to open up the crack leading to further exposure to the elements. At Kavanagh Masonry, we strongly suggest all homeowners choose a metal chimney cap made of 20 gauge enamelled steel. Steel offers superior waterproofing and longevity.

Improper Base Flashing

On many homes, a common problem is the base flashing surrounding your chimney at the roofline has separated from the brickwork allowing water to get in. Depending on the chimney location, sometimes snow can sit behind the chimney and melt away in the spring right on top of the loose flashing and enter your attic space. If you have had your roof done, make sure the roofers have secured and sealed the new flashing to the chimney with a good exterior caulking and rot resistant fasteners.

Water is Absorbed through the Brickwork

Damaged brickwork or deteriorated mortar joints can create openings or cracks that readily allow water to penetrate your chimney. If left unaddressed, these cracks or openings will continue to open up and accelerate the damage of your brickwork potentially requiring a complete chimney rebuild. With adequate chimney maintenance, like chimney repointing, your chimney will be able to resist water penetration for many years to come.

To ensure your chimney is not letting any water get into your home, consider having it inspected by a qualified mason at Kavanagh Masonry. For more information please visit our Chimney Repair service page. If you would like a free estimate on getting your Chimney Repaired, contact us on our Request a Quote page.