Finish 1[4] vs Finish 2 [5]

[fangelo]

Can anyone fill me in on the differences between the Functions of Finish 1 [4] and Finish 2 [5] in wall assemblies?

Thanks,

Fred

[rodneyf]

I am going off the top of my head on this but Finish 1[4] is for exterior finishes and Finish 2[5] is for interior finishes. I will double check when I get back to my desk and let you know for sure.

[archjake]

I just try to keep them consistant for what finishes are where.
Exterior or interior.

I beleive the whole set up has to do with what materials are going to join, and what the priority of the join is.

[bowlingbrad]

This thread (http://forums.augi.com/showthread.php?t=18122&highlight=wall+join) should help explain it a little better

[gravelin]

I think that in the real life, Finition 1 is construct before finition 2.
So in then drawings fintion 1 layers cut fintition 2

[gibson.tim91884]

The 4 and 5 refer to the priorities of the layer. I'm going from the top of my head, so hopefully someone will correct any mistakes here.

Wall joins are controlled by the material and the priority of the layer. If two layers have the same priority (say Finish [4]), AND the same material, then they will usually join seamlessly. If the material is different, then the layers will join with a line between them. This works for around 90% of the walls that I've encountered, and when it doesn't it's usually due to some conflict on another level or walls not lining up properly.

Lower numbered priorities generally indicate that a layer is installed earlier in the construction process. So Structure [1] goes up first, and so on. I use Finish[4] for exterior finishes, and Finish [5] for interior finishes.

As an aside, I used to use Structure[1] for stud layers, and kept fighting with cleanups. My life got much easier when I started using Substrate[2] for instead.

[beegee]

I think the previous posts have explained it well, but the Help file puts it together with some illustrations for clarity :-


You assign each layer a specific function so the layer can join to its corresponding functional layer. Layer functions have an order of precedence.



Rules for Layer Joins



The structure layer has the highest priority, Priority 1. <LI class=bullet_1>Finish 2 has the lowest priority, Priority 5. <LI class=bullet_1>Revit Building connects high priority layers before connecting layers with the lowest priority. For example, you join two compound walls, a layer in the first wall with priority 1 joins to a layer with priority 1 in the second wall. That priority 1 layer can pass through lower priority layers before joining to the other priority 1 layer; a layer with a lower priority cannot pass through a layer of equal or higher priority. The following illustration shows higher priority layers joining before lower priority layers. The priority 1 CMU layer of the horizontal wall passes through all layers, until it reaches the priority 1 stud layer of the vertical wall. Note that the insulation in the horizontal wall does not pass through the air space in the vertical wall, because they are both priority 3 and are outside the core layer.

<SEE IMAGE 1>



When layers join, the join cleans up if the two layers have the same material. If the two layers have different material, a line appears at the join. <LI class=bullet_1>Each layer must have a function assigned to it for Revit Building to match layers accurately.
Layers inside the core of one wall pass through layers of higher priority that are outside the core of the joined wall. The layers in the core extend to the core of a joined wall, even if the core layers are set to priority 5. The following illustration shows how a layer of lower priority inside the core passes through layers of higher priority outside the core. The insulation layer of the horizontal wall has moved inside the core. The insulation layer can now pass through any layer outside the core, regardless of its priority.

<SEE IMAGE 2. >
Layer Functions

Layers can be assigned the following functions:



Structure [1]: Layer that supports the remainder of the wall, floor, or roof.
Substrate [2]: Material, such as plywood or gypsum board, which acts as a foundation for another.
Thermal/Air Layer [3]: Insulation and prevents air penetration.
Membrane Layer: A membrane commonly that prevents water vapor penetration. The membrane layer should have zero thickness.
Finish 1 [4]: Finish 1 is typically the exterior layer.
Finish 2 [5]: Finish 2 is typically for the interior layer.