I kinda worked with these machines for a golf course many years ago. While I never ran the machines, I watched them in use many times. The machines that cut and roll sod have settings to determine how much soil is taken with the cut. Generally the cut is not very deep. The sod that you might buy for your yard barely has any soil at all, and even less so for a golf course. But if this cut weights 50lbs per square foot, that is a deep cut.Care to elaborate on this remark?
Now consider that the rolls are wide and very long. That means that the pieces are going to be very heavy. They are not going to move around on the under-surface because of the friction just from their weight. IMO, the field is going to be as reliable as the stitching between the sections of sod. Since this is a professional company that does only this, I trust that the seams will be fine.
The surface will still be as slick as wet Bermuda grass typically is, but at least the turf will not move or tear. And since it is overseeded, it is likely to be very tight, so hopefully not too muddy.
ETA - for context, the sod that you might buy for your yard would typically weigh about 5 lbs per square foot. This sod weighs 10 times that.
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