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Riverstone Industries  |  SKU: Mont-4-BK-Premium
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Riverstone MONT Premium 8 ft × 4 ft Greenhouse Extension Kit with Workbench, Shade & Watering Systems

$1,249.99 USD
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Description

Riverstone MONT Premium 8 ft × 4 ft Greenhouse Extension Kit with Workbench, Shade & Watering Systems

Expand your existing Monticello greenhouse with the Riverstone MONT Premium 8 ft × 4 ft Greenhouse Extension Kit, a specially designed add-on that seamlessly increases your growing space without replacing your entire structure. Ideal for gardeners whose plant needs are growing, this extension brings extra room and function with high-quality materials and thoughtful accessories.

Built to integrate with Riverstone’s MONT greenhouse series, the premium kit includes not just the extension but also additional gardening systems like a commercial-grade workbench, interior shade cloth, programmable watering system, and a greenhouse sink. The extension itself features the same rugged components as the main greenhouse—8 mm twin-wall polycarbonate panels with an extruded aluminum frame and an automatic roof vent with dual rainwater gutters—ensuring consistent performance and durability.

Installation is straightforward with quick-assembly construction and all necessary hardware included. The flush base design and engineered panel fit help maintain structural integrity and climate control, while the new workspace accessories enhance everyday gardening tasks right where you need them.

Proudly made in the USA and backed by a 10-year limited warranty, this extension kit delivers both peace of mind and practical functionality for year-round growing. Whether you’re adding room for seedlings, expanding seasonal crops, or creating dedicated space for specialty plants, this modular greenhouse solution helps your garden thrive

Features

  • Premium greenhouse extension designed specifically for the MONT series, expanding your existing greenhouse by 4 ft.

  • Includes workbench system, interior shade system, programmable watering system, and greenhouse sink—adding functionality beyond just growing space.

  • High-impact UV-stable 8 mm twin-wall polycarbonate walls and roof provide excellent insulation and light diffusion.

  • Heavy-duty extruded aluminum frame construction with durable protective finish.

  • Automatic 2 ft × 2 ft roof vent with opener and integrated dual rainwater gutter system.

  • Quick assembly with all hardware, tools, and manual included.

  • Made in the USA with a 10-year limited warranty.

Specifications

Specification Detail
Overall Dimensions 8.1 ft W × 4.1 ft L × 7.6 ft H
Panel Material UV-stable 8 mm twin-wall polycarbonate
Frame Material Heavy-duty extruded aluminum
Roof Vent 2 ft × 2 ft automatic roof vent included
Rainwater System Integrated dual rainwater gutters
Included Accessories Workbench, interior shade cloth, programmable watering system, sink
Hardware Included Yes – screws, manual, screwdriver, wrench
Warranty 10-year limited warranty
Assembly Required Yes – tools and manual included
Country of Origin USA

The premium package includes:

  • MONT 4FT greenhouse extension (NOT a full greenhouse)
  • MONT workbench system
  • MONT interior shade system
  • MONT programmable watering system
  • MONT greenhouse sink system

Quick assembly construction

Integrated flush base design; High impact UV stable 8mm twin wall polycarbonate walls and roof; Heavy-duty extruded aluminum frame construction; Natural Aluminum color with a protective coating

2ft x 2ft roof vent with automatic opener Integrated dual rainwater gutter system

What's Included

  • Aluminum framework
  • PC panels
  • Workbench
  • Interior shade cloth
  • Watering system
  • Sink
  • Hardware
  • Instruction manual
  • Screwdriver and wrench

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