Installing waterproofing coatings both vertically and horizontally often requires specific thicknesses to ensure success of the application. Regardless of whether your product is spray, trowel or roll-applied, follow the steps below to properly read the mil thickness.
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Apply your product to the proper substrate as instructed by the manufacturer.
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Insert your mil gauge into the wet membrane (estimating the mil thickness you applied to determine which side to insert)
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Read the mil thickness by noting the deposit on the row of notches. Find the largest tooth/notch that is wet and the smallest tooth/notch that is not wet. The wet mil thickness lies somewhere between these values.
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Reinsert your mil gauge in different areas of the membranes to find the average thickness as application may not be consistent.
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If needed, reapply product to the proper mil thickness.
Watch the video below to see how the measurement works in action.