Weather Proofing the Chimney – A Masonry Work Checklist

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Masonry chimneys are confronted with months long of wind, rain, melting snow, and heat. Being exposed to all the extremes can consequently subject to its deterioration which can pose hazardous threats to homeowners. This is why a checklist should always be followed upon the construction of masonry chimneys. With durable construction and right design, damages can be prevented.

Chimney Walls

When looking at the chimneys in general, look for underlying cracks and openings. They are could be signs of water penetration which ultimately threatens the quality of the chimney’s foundation. In different designs like projecting and sloped surfaces, water tends to be hindered which increases the amount of time that masonry is in contact with water. To prevent this from happening in the future, design and construct compacted, vee, or concave joint may be of use.


When using concrete or mortar, using caulking that contains any type of acid should not be used. Having said that, carefully select silicone caulks because many of the ones found in the market contain acid curatives. When improperly mixed, the caulking that is used for joints appears to be watertight, but the truth is that it has the possibility to welcome leakage.

Chimney cap

In order to fulfill the ultimate weather resisting chimney, it should be made with a chimney cap. They should be designed to extend the chimney walls so that water does not stream downward. Designing a cap that is four inches wider than the chimney is preferable. All these caps should be incorporated with a flashing so that any water that enters it will be kept inside the cap instead of leaking to the rest of the chimney.