I am moving the laundry room to the basement and need to install a dryer vent. Is it better to vent through the rim joist (wait, this house doesn't have a rim joist, the sheathing is attached directly to to the ends of the floor joists). Is it better to go through the sheathing (exterior is vinyl siding) OR should I go through the hollow concrete block below the siding?

I realize going through the sheathing is easier, but I imagine the risk of water leak is much less going through the block. In the absence of cost and money, which method is better?

Also has anyone had any experience with the Dundas Jafine BPSH4WZW ProShield 4-Inch Spring Loaded Dryer Vent Hood?Name:  81e4zlKQC1L._AA1500_.jpg
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