Red Seal Carpenter Practice Exam

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What procedure is used to install asphalt shingles around a masonry chimney?

Install step flashing, roofing and then counter flashing.
Install roofing, counter flashing and then step flashing.
Install step flashing, counter flashing then roofing.
Install roofing and step flashing alternately and then counter flashing.

The correct answer is: Install step flashing, roofing and then counter flashing.

Installing asphalt shingles around a masonry chimney requires a specific procedure in order to prevent leaks. Step flashing, which is a series of small metal pieces that overlap the shingles and are embedded in mortar joints of the chimney, must be installed first. This is followed by installing the roofing material, such as the asphalt shingles, and then the counter flashing, which is a continuous piece of metal that covers the joint between the chimney and the roof. Installing the flashing and roofing materials in the wrong order can cause water to get trapped and potentially lead to leaks. Option B, C, and D are incorrect because they do not follow this correct sequence of installation.