EXTERIOR CHIMNEY
MAIN FEATURES
■ Outdoor application
■ Aboveground application
■ Exposure to rainwater
■ High degree of saturation
The elements that make up an exterior chimney are subject to a high level of saturation. For this type of application, Canadian standard CSA A 179-14 recommends using a Type S Mortar.
Furthermore, installation of any exterior facing is particularly important, since the facing is the first defence against water infiltration. One of the roles of mortar is to effectively manage rainwater flowing over the facing. Since our Canadian climate involves numerous freezing and thawing cycles, it is important that minimal water remain in the facing when the first freezing cycles occur. To help the facing manage rainwater, we recommend using a lime mortar.
Mortars containing lime have long proven effectiveness. Furthermore, Canadian standard CSA A 179-14 indicates that a mortar rich in lime will likely resist water penetration better and reduce cracking. (CSA A 179-14, pg. 44).
Recommendations
TYPE OF MORTAR RECOMMENDED: TYPE S
■ Mortar recommended: King® 2-1-9
