Installation Instructions
Allura Fiber Cement Siding Installaon Manual
46
Installing Subsequent Courses
erla all la siding
Butt end/joints should be staggered two stud bays for 16” o.c. framing, or one stud
bay for 24” o.c. framing.
32” Lap Stagger Pattern for minimum waste and staggered butt end/joints.
Cut and stagger the points as indicated.
Butt and End Joint Application
There are three ways to fasten butt and end joints:
1. Into solid framing
2. Into structural sheathing
3. With an off-stud joiner
Butt End/Joints Fastened into Solid Framing or Structural Sheathing
Butt end/joints should be installed with factory-sealed or factory-prefinished ends
butted together in moderate contact. We recommend that butt end/joints be fastened
into a stud or framing member. If no stud or framing member is available, butt end/
joints may be fastened into structural-rated sheathing.
When installing lap siding, you must install butt joints using either backflashing, joint
covers, or H-covers. Consult local code for butt joint treatment requirements in your
area. Backflashing should be constructed of a durable, non-corrosive material that is
compatible with fiber cement. Do not attempt to flash behind end or butt joints with
housewrap—housewrap will not direct water away from the wall. Flashing size should
be a minimum of 6” wide (3” to the left and right of the joint) and extend at least 1” over
the top of the previous course.