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Window Flashing Formula


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#1 Shelby Webb

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Posted 18 October 2017 - 01:58 PM

I am trying to get a formula for window flashing. We use 4" and 6" Tyvek flashing tape around all 4 sides of the window opening. Depending on if it is a 2x4 or 2x6 wall, it's 4" flashing or 6" flashing. 

 

This is what I am working on, but it isn't reporting. I can do a general formula but it doesn't distinguish between 2x4 or 2x6. 

 

if wall_exterior
   if between (width, 3",5")
      if matches (type, window, door, sliding)
         list ((width*2)+(height*2)/2,4" )
      endif
   endif
endif
 
Any ideas? Thanks!

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#2 Jonathan Barto

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Posted 16 February 2018 - 12:54 PM

Morgan

 

I would do the following.

 

1.  Have it calculate material of wall containing regions of....  then select all your studs types.

2.  set section limit of the region wall thickness.

 

So you will have 2 formula's 

 

one for the 2x6 walls and one for the 2x4 walls



#3 Philip Frank

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Posted 16 February 2018 - 03:18 PM

Thewidth in your formula is referencing an "Opening" width. You can't get the width of a stud wall from an "Opening Group" material definition. 



#4 Sam Allen

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Posted 17 February 2018 - 11:45 AM

Phillip...could you show how the correct formula should look?



#5 Philip Frank

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Posted 19 February 2018 - 06:12 AM

This formula dumps the values into another formula (accumulates into the "Window Wrap" material def). I added the "Thickness" selection criteria to show how to specify the wall thickness, but my setup doesn't require this. You would have to create 2 separate "Window Wrap" material defs (one for 2x4 and one for 2x6) and then create 2 material defs to accumulate them into  (one for 2x4 and one for 2x6​)

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#6 Sam Allen

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Posted 19 February 2018 - 01:57 PM

Thanks!!






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