Laserfiche WebLink
Ludowici Interlocking Tile Installation Manual <br />31www.ludowici.com <br />Flashing at Chimney <br />Since the foundations of chimneys are usually structurally <br />separate, the flashing around chimneys needs to be able <br />to accommodate movement from differential settlement <br />without compromising the watertightness of the roof. <br />Regardless of the climate, install self-adhering Ice and <br />Water Shield membrane around the base of the chimney <br />before the underlayment is applied as a protection <br />against ice dams. Four types of flashing are required to <br />properly flash around chimneys. <br />1. Apron flashing at the down slope face over the <br />installed tiles – 4" minimum exposed width, 6" up the <br />face of the chimney and continuously counterflashed. <br />2. Step flashing along the sides of the chimney. <br />3. Cricket or backer flashing on the upslope side or back. <br />4. Continuous counterflashing embedded in <br />masonry joints. <br />Counterflashing <br />Sheet copper counterflashing should be installed to <br />overlap all vertical flashing flanges extended up the sides <br />of chimneys. This is best accomplished by the mason <br />during construction. <br />Figure 31.1 Chimney Flashing <br />16 oz. Copper Upslope <br />Cricket Flashing <br />16 oz. Copper <br />Counterflashing <br />16 oz. Copper Step <br />Flashing at Each Course <br />6" <br />Minimum <br />16 oz. Copper Apron <br />Flashing 4" Minimum Up <br />Chimney and 4" <br />Minimum Across Tile