Can I use nails to fasten finishes to NUDURA form units?
USE SCREWS- NOT NAILS. Pull testing of fasteners into polypropylene has determined that the most assured fastening for resisting required loading as noted in local building codes are screws – a #6 self tapping screw into NUDURA fastening strips can provide an ultimate pullout holding capability of approximately 222 lbs of force. In addition, use a power driver with the torque set to the lowest possible setting. Your objective is to stop driving the siding BEFORE it begins to dimple into the foam. You want the siding to slide loose so that it can expand and contract in the sun.
