23ZERO Armadillo Horizon 3 Rooftop Tent Annex Room

The 23ZERO Armadillo Horizon 3 Annex Room is a fully enclosed, weather-protected shelter extension designed exclusively for the Armadillo Horizon 3 rooftop tent, adding 70 square feet of covered living space beneath the tent platform. Keder-track attachment connects the annex directly to the tent, with three separate door openings (front, side, and rig-side) giving the space practical flow for everyday camp use. The annex ships as a single variant compatible with the Armadillo Horizon 3 only.

70 Square Feet of Usable Covered Space

At 91 inches wide by 116 inches long, the Armadillo Horizon 3 Annex Room creates a ground-level area large enough to serve multiple functions simultaneously. A dedicated changing area, a kennel or pet zone, a private toilet space, a gear-staging area, and a meal-prep station can all coexist within the footprint without crowding the sleeping platform above. That separation between living functions and sleeping space is what makes an annex meaningfully different from simply having a larger tent.

Weather Protection Built Into the Walls

Eight-inch storm flaps run along the external walls, blocking wind-driven rain and debris at the base of the annex where gaps are most likely to form. Zippered flaps with integrated bug netting let occupants open sections for airflow without surrendering insect protection, a balance that matters on warm nights when full enclosure would make the space uncomfortable. The enclosed wall construction, combined with the storm flaps, keeps the interior dry and sheltered across a range of conditions.

Three Doors, One Practical Layout

The front door (55 inches wide by 70 inches tall), two side doors (45 inches wide by 65 inches tall each), and a rig-side rear door (50 inches wide by 64 inches tall) mean there is rarely a reason to route traffic through the same opening twice. Gear can come in through the rig-side door while people move through the front, and the side doors provide secondary egress without disturbing the main living area. Opening opposite doors creates cross-flow without fully exposing the interior, making selective ventilation straightforward.

Features

• 70 sq ft enclosed floor area: 91" W x 116" L ground footprint extending from the rig.
• Three door configurations: Front (55" x 70"), side (45" x 65"), and rig-side rear (50" x 64") openings.
• 8" storm flaps: Run along external walls to block wind, rain, and debris at the base.
• Zippered bug-net flaps: Allow ventilation while maintaining insect protection.
• Telescoping poles: Adjustable from 31.5" to 94.5" to accommodate varying vehicle heights.
• Keder-track attachment: Rear keder track installs first, followed by side keders, then the annex top zips to the tent.

Specifications

What's Included

• Annex with storage bag
• Two telescoping poles with pole storage bag
• Two pole weather caps
• Two guy lines with tensioners
• Eight stakes
• Two cinch straps

Who This Is For and Isn't

The Armadillo Horizon 3 Annex Room suits overlanders and car campers who own the 23ZERO Armadillo Horizon 3 rooftop tent and want enclosed ground-level space for privacy, pet housing, gear staging, or additional sleeping area. Buyers who mount their tent at or near the recommended 72-inch height will get the best fit and performance from the annex.

The annex is not a standalone shelter and cannot be used without a compatible Armadillo Horizon 3 rooftop tent. It does not fit other 23ZERO tent models or third-party rooftop tents. Vehicles with tent mounting heights significantly above or below 72 inches may experience fit issues: at greater heights the floor may need to be removed to prevent damage, and at lower heights excess material may rest on the ground.

Common Questions

Which tent does the Armadillo Horizon 3 Annex Room fit?

The Armadillo Horizon 3 Annex Room is designed exclusively for the 23ZERO Armadillo Horizon 3 rooftop tent. It attaches via the tent's keder track system and is not compatible with other 23ZERO tent models or rooftop tents from other brands.

What is the recommended vehicle height for the annex?

The Armadillo Horizon 3 Annex Room performs best when the tent is mounted approximately 72 inches off the ground. At heights significantly above this, removing the annex floor may help prevent material stress; at lower heights, excess material may pool on the ground.

How many access points does the annex have?

The Armadillo Horizon 3 Annex Room has three door openings: a front door (55" W x 70" H), two side doors (45" W x 65" H each), and a rig-side rear door (50" W x 64" H), allowing flexible movement and ventilation around the camp setup.

What is the correct order for setting up the annex?

To set up the Armadillo Horizon 3 Annex Room, install the rear keder track first, then attach the side keders, and finally zip the annex top to the tent. Poles, guy lines, and stake-out points must all be fully secured for the annex to perform as intended.

Can the annex be stored wet?

The Armadillo Horizon 3 Annex Room should be aired out if packed away wet to prevent mold. For storage, lay the annex flat, fold it lengthwise in thirds, insert the poles, roll it tightly, and secure with the included cinch straps before placing it in the storage bag.