Installation Instructions
Allura Fiber Cement Siding Installaon Manual
40
Fastening Schedule
Trim Si ze
Number
of Fasteners
Spacing
4” wide or less 2 12” to 16” o.c.
5” wide or more 3 12” to 16” o.c.
Drive the fastener perpendicular to the surface of the trim.
Penetrate the framing at least 1”.
Always nail from one end to the other. Never nail from both ends to the middle—it
will stress the trim board.
Drive the fastener flush with the trim.
When you install trim over lap siding, always nail through the trim and the
underlying siding. Be sure to nail on the high points—or overlap—into the framing.
Do not over drive the fasteners. When a fastener is driven below the surface of the
trim, its holding power is reduced and it creates an entryway for moisture.
Irregularities in framing may be visible in the finished application. To minimize the
effect of uneven walls, shim the wall as necessary.
If you are hand nailing, it may be necessary to predrill to help prevent the corners
from breaking. Position fasteners no closer than 1” from the side edges of the trim
and no closer than 2” from the end.
For trim 4” wide or less, fasten in an alternate position to both sides of the piece,
spaced no more than 12” to 16” o.c.
For trim 4” wide or more, but less than 5” wide, apply two fasteners, one on each
side of the piece, spaced no more than 12” to 16” o.c.
Tri m w id er th an 5” re qu ire s th ree f as te ne rs .
Paint/Primer
Use a 100% acrylic latex paint or primer applied according to the paint manufacturer’s
recommendations.
Windows and Doors:
Square or miter-cut the trim boards.
Nail trim flush to the window or door.
Outside Corners:
When assembling a traditional corner from two pieces, fasten the trim to the substrate,
studs or blocking every 12” to 16”.