I wouldn t apply it over metal siding with or without furring strips.
Attaching hardi siding to steel purlins.
The term applies to a nailing screwing method for joining hardieplank planks to hide nail or screw fasteners.
If your going to use hardi board take off the metal siding and install osb or plywood first.
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.
Siding siding should be installed using the standard fastening and overlap patterns to ensure optimum.
Three screw threads must penetrate the steel stud.
Bolt the piece of wood to the steel frame by pre cutting holes into the frame so the bolts can fit through.
Use a number 8 1 1 4 inch long by 0 375 inch wide hd ribbed wafer head or equivalent screw on steel studs.
Hardie plank siding is almost always installed with air nailers which are the best tool for quick installation.
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.
It s best to stagger the joints in each successive course to avoid noticeable patterns.
Use bolts made specifically for screwing into steel or metal if attaching wood flush onto a steel frame.
From the ends of the plank.
The manufacturer does not list an appropriate wood stud screw.
Bolts should be completely threaded.
James hardie prefers and recommends installation of hardieplank lap siding by the blind nailing technique such that fasteners are hidden by the course above.
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.
James hardie recommends installing a rainscreen an air gap between the hardiepanel siding and the water resistive barrier as a best practice.
We do recommend it however.
Drill guide holes to slide the bolts through the wood into the steel frame.
From the top edge and no closer than 3 8 in.
Hardi board is some brittle stuff and will break if you look at it wrong if not applied over a solid backing material.
The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.
Ring shank pole barn nails heavy wood screws lag screws or bolts are often used for attaching these purlins.
You can make your own fiber cement starter strip by ripping a piece of hardieplank lap siding into 1 1 4 inch strips.
Do all roofing projects require purlins.
