Installation Instructions
Allura Fiber Cement Siding Installaon Manual
35
Secon 8: Wall Preparaon and Sheathing
Before installing Allura Fiber Cement Siding, review and comply with all local building
codes and regulations regarding wall construction, including the proper use of framing
(24” o.c. max.), weather-resistant barriers, flashings, and other building materials
and systems.
If the sheathing is thicker than 1”, consult the recommendations below for installing
Allura Fiber Cement Siding over continuous insulation systems.
Double and Single Wall Construction
Allura Fiber Cement Siding should be applied over a rigid sheathing that provides a
smooth, flat surface that is no more than 1” thick. Siding is an exterior cladding. It is
not a complete weather-resistant barrier, so be sure to flash around all openings.
Do not install siding over questionable wall construction. Irregularities in framing
may become visible in the finished application. To minimize the effect of uneven
walls, shim the wall as necessary.
In accordance with best building practices, there should be a gap between
dissimilar materials. Fiber cement should be separated from other materials such
as bri stone ood and metal A ga is reommended Alas aul beteen
siding and dissimilar materials.
Siding is not a structural component of the wall. In single-wall construction, lateral
bracing is required between the studs.
Non-structural materials such as underlayments, foam board, or lathe/furring
strips may not exceed 1” in thickness without re-establishing a structural nailable
substrate (see below for details).