The approximate depth after placing the first layer is which value?

The approximate depth after placing the first layer is which value?

• A. 2 1/2 inch
• B. 2 5/8 inch
• C. 3 inches
• D. 2 3/4 inch

Answer: (B)

When you’re layering concrete or a repair overlay, the depth you place in the first layer is set so that, after adding the next layer(s), the final finished thickness matches the design. In this case the final thickness is 3 inches, and the second layer (the finishing coat) is about 3/8 inch thick. Subtracting that finishing layer from the total gives 3.00 - 0.375 = 2.625 inches, which is 2 5/8 inches. So the first layer should be placed to about 2 5/8 inch. This ensures the overall thickness ends up correct after the top layer is applied.

When you’re layering concrete or a repair overlay, the depth you place in the first layer is set so that, after adding the next layer(s), the final finished thickness matches the design. In this case the final thickness is 3 inches, and the second layer (the finishing coat) is about 3/8 inch thick. Subtracting that finishing layer from the total gives 3.00 - 0.375 = 2.625 inches, which is 2 5/8 inches. So the first layer should be placed to about 2 5/8 inch. This ensures the overall thickness ends up correct after the top layer is applied.