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Most residential roofs have soil stacks that require proper sealing. Apply shingles up to the vent pipe and cut an opening in the shingle that is set over the pipe. Set the shingle in approved asphalt cement. Set the vent flange over the pipe - flat on the roof - in asphalt cement that has been evenly applied over the bottom shingle. The top of the flange must be covered with the next row of shingles. Remember that using an excessive amount of plastic cement may cause blistering.

Solution:

Repair improper detail by using a new flange and new shingles. Don’t forget to use IKO Shingle Stick!