They now recommend a 4” nail at a 4/12 nailing pattern and the Zip-R 12 panels should not be used for shear. Having said all that, it appears that Huber has changed their instructions on the Zip-R 12 panels. Our framer still had to buy a new gun for that. But, the Structural Engineer and Huber both agreed since it was an interior, non-structural / non-shear application, it would be okay. We did use 4” nails in a wall in this application. So, we used that to sheath the wall between the garage and living spaces in the house. Since you have to buy the Zip-R panels in a palette, we would up with almost a full palette extra. And, not many nail guns can take a 4 1/2” nail. One of the issues that came up was the length of nails required for the 2 1/2” panels was a 4 1/2” nail (as I recall) which is longer than any nails that we could find - other than some out of stock product from a sketchy web site. The framer doubled the studs at all the joists so that the screws at the panel joints did not have to share a stud. Both of these screws had flat heads and were self tapping. We also had difficulty getting enough of these screws and for a while had to buy a 4 1/2” HeadLok Timber screw. We used the 4” long Strong-Drive® SDWS TIMBER Screw with a 6/12 screwing pattern (6” on edges and 12” in the field). We did ask Huber and they deferred to the Structural Engineer recommendations. In this way, the panels provide a thermal break with continuous insulation, but windows and doors can be installed in plane with the sheathing with no need for the fussy flashing details often associated with exterior rigid-foam insulation. On the outside, they have ZIP System’s proprietary water-resistive barrier (WRB) over a structural OSB panel. ZIP R-sheathing panels have the insulation on the inside-installed, the insulation is in contact with the studs. ![]() This is one of the reasons he specs ZIP R-sheathing when the budget allows. Paul recognizes that the latter is a better option from a durability perspective but is wary of builders’ ability to get the details right when installing exterior rigid foam outside of the sheathing. When the budget allows, he specs mineral-wool cavity insulation, a ventilated rainscreen behind the siding, and ZIP System R-sheathing.Īustin’s building codes call for wall insulation minimums of R-15 cavity insulation or R-13 cavity insulation plus R-2 continuous insulation. ![]() In a market where the norm is to fill the stud bays with fiberglass batts, sheath the house with OSB, install a lumberyard-branded housewrap, and nail the siding directly to the wall, Paul tries to do a little better. That means he is always working to balance his clients’ budgets and to make sure that he’s delivering the features they are after while still designing a quality building. ![]() He’s not building affordable homes, but neither are his projects at the upper end of the market. His projects tend to be on the modest side in a city that has its fair share of high-end custom homes. Paul DeGroot is an architect in Austin, Texas.
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