MODULAR WINDOW SUB-SILL UNIT FOR RAINWATER DRAINAGE

摘要

An improved window sill system has a modular bottom sub-sill unit to be attached to a bottom part of a window unit and mounted to a bottom frame part of a window frame in an opening in an exterior wall of a building in order to provide improved water drainage for the window sill system. The bottom sub-sill unit has a water trough or channel extending across its length at a front edge facing outwardly of a window unit to which the sub-sill unit is mounted. The water trough or channel has a top plate provided with a plurality of weep holes for capturing rainwater dripping down the window into the water trough or channel. A base plate is provided for mounting the bottom sub-sill unit with fastener screws to the bottom frame part of the window frame. An inner deflection wall deflects water from the weep holes into the water trough or channel to prevent water from reaching the fastener screws in a dry zone below the inner deflection wall.

主权项

1. A window sub-sill system, formed as a modular bottom sub-sill unit to be structurally attached to a bottom part of a window unit and mounted on a bottom frame part of a window frame in an opening in an exterior wall of a building for improved water drainage, said modular bottom sub-sill unit comprising:
a horizontally-extending top plate to be fastened to a bottom part of a window unit placed on top of it and having a plurality of weep holes spaced across a horizontal length thereof for capturing rainwater or condensation moisture seeping down the window unit, a water trough or channel formed below and extending across a the horizontal length of the top plate for receiving moisture from the weep holes and channeling it to exit holes at an outer front edge portion for discharging water outwardly from the bottom sub-sill unit, a horizontally-extending base plate for mounting the bottom sub-sill unit with fastener screws to a bottom frame part of the window frame, and an inner deflection wall provided for diverting moisture captured by the weep holes into the water trough or channel so as to prevent moisture from reaching the fastener screws in a dry zone below the inner deflection wall.