The fence system attaches to an aluminum or steel rectangular base post in concrete or the ground. The inside wall of a fence column slides over the base post. The fence column also has an outside wall around the inside wall. Three sides of the fence column have an elongated slot which receives one end of a slat. Translucent slot covers may enclose lights within the slots.

A fence post extension for extending a length of an existing fence post. The fence post extension has a tubular body and a coupling sleeve. The tubular body has an end section configured to be inserted into an interior space of the exiting fence post via an open end section of the existing fence post. The coupling sleeve is configured to be mounted to the end section of the existing fence post and to surround a portion of the inserted tubular body.

A privacy fence system includes an upright fence column incorporating at least two slots for accepting a plurality of privacy fence slats. The privacy fence slats are primarily a single layer of aluminum of sufficient structural integrity that may stand upright, unaided, when joined between two upright fence columns. The privacy fence slats incorporate a pair of mating lips and tines at their bottom and top, respectively, for enabling the privacy fence slats to be joined together thereby forming a uniform whole for the entire height of the privacy fence. The privacy fence system components are sufficiently lightweight that may be cut with typical hand tools available to most contractors so that a privacy fence created using the privacy fence system may be cut to size as desired on site without welding or special tools. Covers may obscure connecting means between the upright fence column and privacy fence slats.

Reinforced post assemblies for railing or fencing systems that include: base plates; posts; and inserts, which are positioned within the posts and are directly connectable to the base plates. The inserts are configured for slidable insertion into the posts in a generally vertical direction and reinforce the posts assemblies to increase the strength and/or the rigidity thereof.