What should the screed be lowered onto after the paver is checked?

The screed should be lowered onto starting blocks or shims of the same thickness as the loose mat because this helps ensure that the initial layer of material is laid at the correct thickness. Using blocks or shims allows for precise leveling, which is crucial in creating a uniform and even surface, especially when laying down materials like asphalt. This practice prevents potential inconsistencies in the mat thickness, which can lead to problems in the road’s integrity and performance later on.

It’s also essential for the starting blocks or shims to match the thickness of the loose mat to maintain the desired elevation throughout the paving process. This technique helps facilitate a consistent application of the material, ensuring better adhesion and overall quality of the roadway.

Other choices do not provide the necessary precision or support needed during the screed setup. For example, cement blocks or a flat surface may not account for the specific thickness required, while lowering the screed onto the aggregate base layer might lead to uneven distribution of the loose mat.