Drip Cap: Difference between revisions

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Drip cap is used whenever water running down a wallcan get behind a horizontal surface.
=Drip Caps=


This article says that even windows with an integral nailing fin benefit from a drip cap.
Drip cap is used whenever water running down a wallcan get behind a horizontal surface.  Such as behind a door or window, or when the door or window has a non-integral flange at front or back or both.
 
This article says that even windows with an integral plastic nailing fin benefit from a drip cap.


https://www.marvin.com/blog/a-guide-to-window-rigid-head-flashing
https://www.marvin.com/blog/a-guide-to-window-rigid-head-flashing


This seems to be folklore, not first priciple thinking. How does a drip cap benefit if it sends water away from fully water-proof plastic?  
This seems to be folklore, not correct. How does a drip cap benefit if it sends water away from fully water-proof plastic?  


See picture:
See picture:
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Can you tell me what the drip cap is doing in this case? My conclusion is - nothing.
Can you tell me what the drip cap is doing in this case? My conclusion is - nothing.


=Window Water Instrusion=
Properly designed windows let in water around the gaskets (but not likely at the panes themselves). Windows are designed to let this water back to the outside from the frame area:
Properly designed windows let in water around the gaskets (but not likely at the panes themselves). Windows are designed to let this water back to the outside from the frame area:



Revision as of 17:57, 21 February 2023

Drip Caps

Drip cap is used whenever water running down a wallcan get behind a horizontal surface. Such as behind a door or window, or when the door or window has a non-integral flange at front or back or both.

This article says that even windows with an integral plastic nailing fin benefit from a drip cap.

https://www.marvin.com/blog/a-guide-to-window-rigid-head-flashing

This seems to be folklore, not correct. How does a drip cap benefit if it sends water away from fully water-proof plastic?

See picture:

https://photos.google.com/search/windws/photo/AF1QipP5zbcnh7JKwpaxeR2unHZKB6H-DBuEO2eUXpPh

This is prior to sealing nailing fin with butyl tape.

Can you tell me what the drip cap is doing in this case? My conclusion is - nothing.

Window Water Instrusion

Properly designed windows let in water around the gaskets (but not likely at the panes themselves). Windows are designed to let this water back to the outside from the frame area:

https://www.windowguysflorida.com/blog/why-you-need-to-waterproof-your-hurricane-impact-windows/#:~:text=Due%20to%20function%20and%20design,strips%20and%20enter%20the%20frame.

Just sayin'.