# Sheathing Configuration – Sheathing Layout
**Sheathing Layout** – predefine settings for Inner/Top and Outer/Bottom sheathing layers.
Up to two sheathing layers can be created from each side. That’s why there are separate settings for the first and second layer.
**First** and **Second** sheathing layers can be predefined in the **Link Wall**, **Link Floor** or **Link Roof** using **Sheathing** and **Sheathing II** from **Framing Layer** column.
### Parallel or Perpendicular to Stud/Joist
**Parallel** or **Perpendicular to Stud/Joist** – select if the sheathing should be parallel or perpendicular to the joist.
### Build in Place
**Build in Place** – writes Yes/No information into the sheathing instance parameter if it is build-in-place or is prefabricated with the whole wall/floor/roof frame. This parameter can later be used in schedules or view filters.
*Example with wall:*
*Example with floor/roof:*
*Example with metal roof:*
### Bottom/Base Extension and Top/End Extension
**Bottom/Base Extension, Top/End Extension** – adds an offset from the wall/floor/roof base or end.
*Example with metal wall:*
*Example with wood floor/roof:*
### Sloped Top/End Extension and Sloped Bottom/Base Extension
**Sloped Top/End Extension** and **Sloped** **Bottom/Base Extension** – adds an offset from the sloped wall/roof/roof base or end.
### Placement Direction
**Placement Direction** – predefines sheathing direction: **From Start**, **From End** or **From Both Sides**.
*Example with wall:*
*Example with floor/roof:*
### Second Row Overlap Distance
**Second Row Overlap Distance** – defines overlap distance between sheathing layouts if **Perpendicular to Stud/Joist** checkbox is ticked.
*Example with wall:*
*Example with floor/roof:*
### Align with Studs/Joists
**Align with Studs/Joists** – aligns sheathing with studs or joists.
*Example with wood frame:*
*Example with metal frame:*
*Example - ceiling gypsum elements can be divided into Parts and aligned with ceiling frames:*
### Allow to Split on Second King/Joist
**Allow to Split on Second King/Joist** – splits the sheathing on the second king or joist of the opening.
*Example with wood frame:*
*Example with metal frame:*
*Example with metal floor frame:*
### Always Try to Merge Parts
**Always Try to Merge Parts** – tries to merge parts if two parts share the same edge. Merged part size will not exceed the sheathing size that is predefined under **Sheathing Dimensions**.
### Including Part with Different Edges
**Including Part with Different Edges** – tries to merge parts with different edges of two parts. Merged part size will not exceed the sheathing size that is predefined under **Sheathing Dimensions**.
***Including Part with Different Edges** is switched ON:*
***Including Part with Different Edges** is switched OFF:*
### Vertical Split on Opening Side
**Vertical Split on Opening Side** – splits sheathing on the opening side, the nearest stud/joist, or the nearest king if top and bottom trimmers are predefined in the **Opening Framing**.
*Example with wood wall frame:*
*You can predefine top and bottom trimmers under **Wall+** → **Configs** → **Framing Configuration** → **Opening Framing**:*
*Example with metal wall frame:*
*You can predefine top and bottom trimmers under **Wall+M** → **Configs** → **Framing Configuration** → **Opening Framing**:*
*Example with metal floor:*
*You can predefine top and bottom trimmers under **Floor+M** → **Configs** → **Framing Configuration** → **Opening Framing**:*
### Minimal Width of Opening for Split
**Minimal Width of Opening for Split** – define the minimum width of opening for which splits would be available.
*Example: If the window, door, or other opening width is less than the predefined value, then there will be no splits around the opening:*
*If the window, door, or other opening width is more than the predefined value, then there will be splits around the opening:*
### Horizontal Split on Opening Side
**Horizontal Split on Opening Side** – defines if the sheathing must be split horizontally around the opening.
*Example: **Horizontal Split on Opening Side** is ticked OFF:*
*Example: **Horizontal Split on Opening Side** is ticked ON:*
### Split by Steeped Top/Bottom Ridge
**Split by Steeped Top/Bottom Ridge** – splits sheathing by steeped top or bottom ridges.
