Getting windows flashed properly is critical to keeping water out of walls. One of the most difficult areas to do properly is the corner between the sill and the jamb. Siga makes a piece of flashing tape that fits perfectly into corners, and here we show how to install it.

You can find additional info on this topic in this article:

Easy Window Flashing at the Corners
https://www.energyvanguard.com/blog/e...

Products donated to this basement renovation from:

Siga flashing tapes and tools, including the Rissan 430 Grey Corner, https://www.siga.swiss/us_en/products...
Innotech Windows & Doors four windows
Huber Engineered Woods Advantech XFactor subflooring, used for the jambs of the window bucks

Photo credits:
Missing sill flashing Edward Louie, PNNL, public domain from the Building America Solutions Center
Rotten wall public domain from the Building America Solutions Center
Raincoat Zeesenboot, CC BY 2.0 https://www.flickr.com/photos/zeesenb...
All other photos and video by Energy Vanguard