Attaching Hardi Siding To Steel Purlins

Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern.

Attaching hardi siding to steel purlins.

Use bolts made specifically for screwing into steel or metal if attaching wood flush onto a steel frame. The term applies to a nailing screwing method for joining hardieplank planks to hide nail or screw fasteners. You can make your own fiber cement starter strip by ripping a piece of hardieplank lap siding into 1 1 4 inch strips. If your going to use hardi board take off the metal siding and install osb or plywood first.

Use a number 8 1 1 4 inch long by 0 375 inch wide hd ribbed wafer head or equivalent screw on steel studs. We do recommend it however. Hardie plank siding is almost always installed with air nailers which are the best tool for quick installation. From the ends of the plank.

Drill guide holes to slide the bolts through the wood into the steel frame. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. Three screw threads must penetrate the steel stud. James hardie prefers and recommends installation of hardieplank lap siding by the blind nailing technique such that fasteners are hidden by the course above.

The only downside of pneumatic tools is that sometimes the installer will get going a little bit too quickly and will lose track of where the nails are going. Fasteners shall be installed between 1 in. From the top edge and no closer than 3 8 in. And bottom purlins on an arched rafter building to prevent the curved panels from pulling the purlins loose from the rafters.

Do all roofing projects require purlins. Bolt the piece of wood to the steel frame by pre cutting holes into the frame so the bolts can fit through. Ring shank pole barn nails heavy wood screws lag screws or bolts are often used for attaching these purlins. Hardie board siding is a cement board siding that can be installed over braced wood or steel studs on the exterior of a building to provide a strong durable covering that creates the look of wood siding without the expense or maintenance requirements.

James hardie recommends that you consult your design professional if you have questions regarding the use of rainscreen on your single family project. It s best to stagger the joints in each successive course to avoid noticeable patterns. Hardi board is some brittle stuff and will break if you look at it wrong if not applied over a solid backing material. Siding siding should be installed using the standard fastening and overlap patterns to ensure optimum.

Bolts should be completely threaded. I wouldn t apply it over metal siding with or without furring strips.