Sliding Door Sill Flashing

Unless a door is well protected by a porch or large overhang good pan flashing at the sill is critical to prevent water from seeping into the floor framing.

Sliding door sill flashing.

Pro builders erik and jaime perkins explain how to build better homes by build. Doors leading to patios and decks are particularly vulnerable to wetting around the sill from splashback and in cold climates from snow buildup. They are also susceptible to damage when an installer slides the door into place. To effectively keep out air and water a sill pan needs to be properly sealed.

I m planning on using sure sill sloped sill pan on a sliding door wall and would like to provide trim for my siding to terminate at below the door. Even if they have a proper sill pan builders may be unsure about the right sealant to use for the most effective barrier and to meet code. Flashing tape sill pans also don t have the proper slope to allow water to drain to the outside. My initial thought is to trim along the sill cutting a 5 degree bevel on the top of the trim piece.