How do you attach Hardiboard (Cement Board) siding to NUDURA & what screw do you recommend for use with Hardlipanel or Hardiplank?
The attached information has come to us from Compass International. They make a screw which you’ll see outlined on the attached PDF file which features a coarse thread screw with a flat head that also features scraping blades on the underside of the head to countersink the head into cement board product. Compass Intl Hardi Plank Fastener I’ve also included a copy of the NER Report for James Hardie Products which verifies that the report accepts use of specially manufactured nails for anchorage of Hardipanel and Hardiplank into metal studs with an ultimate holding power of approx. 105 lbs/nail. NER 405 Attached you will find NUDURA product pull testing of # 6 Drywall screws & # 10 coarse thread Pan Head screws into NUDURA high density polypropylene webs achieve an average ultimate pullout of 222.3 lbs. and 274.7 lbs. respectively (1 kilo Newton = 224.8 lbs of force). The Compass Screw being specified has been tested with other polypropylene web based ICF systems and has been known to ac
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