Abstract: A continuous sidelight threshold and door sill assembly for use with entryways having at least one fixed sidelight panel and a hinged door panel comprises an extruded aluminum frame having an elongated channel and a sloped sill. A vertically adjustable threshold cap is shorter than the channel is configured to fit in and be selectively positioned at a predetermined location along the channel. A separate panel cap is also configured to fit in the channel and be selectively positioned therealong. The assembly is universally adaptable to be used either with left handed, right handed, or double sided sidelight door entryways simply by positioning the threshold cap and the panel cap at respective appropriate locations along the channel. A removable paint shield is provided to protect the threshold and sill assembly from paint and damage during construction of a building in which the assembly is installed.