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  • All-Metal Caterpillar Tunnel Kit with Butterfly Doors

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    US-Manufactured CAT Tunnel Kit

    Introducing the Bootstrap Farmer Caterpillar Tunnel with butterfly doors. This complete tunnel kit combines the simplicity of traditional cat tunnels with the durability of a hoop house, making it an essential tool for crop protection and cultivation.

    Bootstrap Farmer understands the farmer's need and desire to protect crops with a polytunnel without the extra expense of end walls, and hip and baseboards. Our solution? A structure that withstands harsher weather than standard cat tunnels while remaining far easier to assemble and use than a traditional high tunnel.

    Choose the Bootstrap Farmer Caterpillar Tunnel with Butterfly Doors for a straightforward, efficient, and robust solution to keep your farm running smoothly.

    • Available in 20’, 40’, 60’, 80', 100', 150' lengths & 14 or 20’ widths

    Approximate heights per width:

    14’ = Approx. 9’4” at center

    20’ = Approx. 11’4” at center

    Note: 20’ tunnel extends 12’ past on each end & 14’ extends 9’ on each end when doors are closed.


    • All frame components feature Flo-Coat®, a Clear Organic seal on US-made Galvanized pipes.
    • US Steel 16 gauge Pre-Bent Precision Hoops
    • US Steel 16 gauge Ground Posts 
    • Galvanized Hardware Kits include brace bands, nuts, bolts, and washers, zinc self-tap screws. Includes nut drivers & drill bits. 
    • Ground Post Driver
    • 6 mil greenhouse plastic (4 year warranty)
    • Batten Strap to cinch up greenhouse plastic to the frame, while included hoop springs allow for manual side curtain ventilation.
    • Available in 20’, 40’, 60’, 80, 100’ lengths. After 100' lengths, custom lengths are available. 
    • Guided Instructions, Videos, and Customer care are available 7 days a week via phone and email.

    Available Add-on Options

    • Shade Cloth Kit (Black or White)
    • Weed Barrier Ground Cover
    • Truss support


    • Triple-Layer Protection Tubing: Combines zinc, conversion coating, and a clear organic polymer for a durable, strong, and visually appealing finish.

    • Ridge Pole and Wind Braces: Made from 1.35” OD 16 GA Texas-fabricated, US-sourced steel tubing, these features add rigidity along the top spine of each hoop and prevent frame movement.

    • Structural Integrity Upgrades: Traditional CAT tunnels are reimagined with 1” OD 16 GA ground posts, triple-layer protected, US-sourced steel tubing, replacing rebar pins for deeper ground anchorage and enhanced stability.

    • Optional Truss Parts: Available for areas with high winds or heavy snow, these parts are made from the same high-quality material for additional lateral support.

    • Ventilation and Plastic Securing Mechanisms: Includes a Batton Strap for securing greenhouse plastic and hoop springs for manual side curtain ventilation, with an option to upgrade to roll-up sides.

    • Innovative Butterfly Doors: These unique doors streamline end-wall management, providing easy access, efficient ventilation, and effective protection against weather elements. No more bunching up loose plastic at the ends; laborious and unkempt loose plastic is unsightly and a potential fail point. Rapidly open and close your entire end wall to vent or move equipment and harvests in and out of the tunnel. The clamshell design sheds water and winds over your tunnel during rain events and dumps heat build-up in the summer with easy closing and opening.  

    • Scalability for Growth: The design allows for future additions such as end walls, hip and baseboards, and other customizations to accommodate expanding farming needs.

    Not sure if a caterpillar tunnel is right for you? Check out this helpful article.

    Shipping: Caterpillar Tunnel Kit will ship via motor freight.  

    Click Here for More Details on Freight Shipments.

    For custom lengths:

    Please send an email to contact@bootstrapfarmer.com with your requirements and shipping zip code. 

    Free shipping on orders over $49 to Contiguous US
    Shipping Policy

    Most products will ship from our facility in 1 to 2 business days after the order is placed.  Express shipments placed after 12PM EST will be shipped out next business day. Full details can be found on our Shipping Policy Page

    Returns Policy

    Returns can be made on most products within 30 days of purchase. After 30 days we unable to offer a refund or exchange. Certain products are non-returnable. For full details visit our Returns Policy


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