3-1/2 in. SureCorner Flexible Corner Flashing for Window Installation (Pack of 4)

A:  I could see that working

A:  The SureSill corner flashing is designed to be used with stepped flashing, so yes, it should work well for a skylight, as long as there is a slope that will carry any water down and away from the skylight.

A:  The SureCorner is meant for windows only Water will need to be sloped away from the skylight.

A:  Unfortunately, We do not sell this product in stores. This item needs to be purchased through HD online.

A:  Need a full sill pan for doors you can use adhesive flashing tape for windows

A:  Perfect application

A:  This product is good for hard to seal areas in window corners. Of course, you are still going to need to create a widow bottom sill from some type of flexible adhesive membrane to use in conjunction with these corners. For doors, you really want to use an all-in-one sill pan that has a lip behind the door, slopes toward the door opening and has built in corners, something that makes it impossible for water to back flow under an exterior door threshold. Use something like this: The SureSill 4-1/8 in. x 117 in. White PVC Sloped Sill Pan for Door and Window Installation and Flashing (Complete Pack)

A:  It is best suited for windows. It is best for a single piece installation under doors.

A:  As a builder, I have used these along with some flashing membrane under doors. This company makes plastic sill pans and they recommend those since they drain better and are continuous plus have some some slope and a interior lip to prevent water from getting inside the house.

A:  These are placed on the bottom two corners of the rough window opening so you need two per window.

A:  Typically, you need one corner piece per side. So 2

A:  Two, you only need for the bottom corners

A:  2 per window. So a pack of 4 will do 2 windows. You just need them on the bottom corners

A:  I put them in all 4 corners but you only "need " them in the bottom 2