Weatherproof Window Installation, Episode 1: Prepping the Rough Opening
Learn techniques for protecting the window opening with an angled sill and flashing tapes
Prepping the Rough Opening: A good window installation is much easier to achieve when you start with an accurately-sized and square rough opening. Water leaks from windows usually show up at the sill—which is by far the most vulnerable area of a window opening—so that’s where the weatherproofing efforts begin.
Read the related article:
A Weatherproof Window Installation