A vapor barrier is to be placed below the slab in Problem 51. Determine the number of 10-foot by 100-foot rolls of vapor barrier needed. The vapor barrier needs to be lapped one foot. Hint: Subtract the lap from the width of the roll. Run the rolls the 100? direction; therefore, one roll will cover the length of the slab.
What will be an ideal response?
Number of rolls wide = 83? / 9? = 9.2 – Use 10 rolls 100? long
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