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How to Assemble a Riverstone MONT Greenhouse Step by Step

by Cliff Co 6 min read

Setting up your Riverstone Industries Greenhouse is an exciting project, and we’ll make sure it goes smoothly. Whether you’ve chosen the MONT Mojave or the MONT Growers Edition, both models share the same strong aluminum frame and high-quality polycarbonate panels. We’ll walk you through each part of the process, from the foundation to the finishing touches, so you can build your greenhouse with confidence.

Follow this guide and we’ll help you assemble your greenhouse efficiently and safely.

Riverstone Industries greenhouse

Key Takeaways

Step 1: Unpack and organize all parts before assembly.

Step 2: Build and square the base frame on a flat, level surface.

Step 3: Assemble wall frames and insert all side panels.

Step 4: Add the roof frame, rafters, and polycarbonate roof panels.

Step 5: Install doors, vents, and the Mojave fan if included.

Step 6: Seal all joints, apply weather stripping, and finish with the shade cloth if available.

Things to Check Before You Start

A successful build starts well before you pick up a drill. Here’s what we recommend doing several days before you begin assembling your greenhouse:


Choose Your Greenhouse Location

Pick a sunny, open area that receives at least six hours of direct sunlight daily. Avoid spots with overhead trees or uneven ground. The site should have good drainage and easy access for watering and maintenance.



Prepare the Foundation

Your greenhouse must rest on a flat, solid surface. A concrete pad, paver base, or treated wood platform works best. Make sure it’s completely level in all directions. If it isn’t, use shims or compacted gravel to even it out.



Inspect Your Packages

When your shipment arrives, carefully check each box for damage. The MONT kits typically come in multiple cartons that include aluminum framing, polycarbonate panels, and hardware packs.



Unpack and Organize Components

Lay out all parts on a clean, dry surface. Keep the panels flat and protected from wind. Separate hardware into labeled containers for easy access. Group parts according to section (base, walls, roof, vents, doors).



Review the Instructions and Plan Ahead

Read through this entire guide before starting. It helps to understand how each section connects so that assembly feels like one continuous process. Identify which steps need a second person — most notably the wall and roof sections.



Check the Weather

Choose a calm, dry day for assembly. High winds or rain can make handling panels difficult and affect accuracy.


Prerequisites

Tools You’ll Need

  • Power drill with Phillips bit
  • Rubber mallet
  • Measuring tape
  • Level
  • Two step ladders
  • Wrenches or socket set
  • Screwdriver set
  • Utility knife or scissors
  • Safety gloves and protective eyewear

Included in your kit:

  • Aluminum extrusion frames and corner connectors
  • Twin-wall polycarbonate panels
  • Stainless steel bolts, nuts, and screws
  • Door frame, hinges, and handle
  • Roof vent frame and automatic opener
  • Weather stripping and silicone sealant
  • Shade cloth and fan (Mojave models only)

Safety Tips

  • Always wear gloves and safety glasses when handling aluminum and panels.
  • Have at least one other person assist you.
  • Avoid using power tools on ladders.
  • Do not overtighten screws or bolts.
  • Keep all tools and small parts out of children’s reach.
  • Take regular breaks during assembly to avoid fatigue.



Step 1: Assemble the Base Frame

The base frame sets the foundation for the entire greenhouse, so take your time here. A level, anchored base ensures every other part of the structure fits correctly and prevents shifting in high winds.

  1. Lay out the aluminum base profiles on your prepared surface, forming a rectangle that matches your greenhouse dimensions.
  2. Connect the corners using the supplied corner connectors and bolts. Tighten just enough to hold everything in place.
  3. Check for square by measuring both diagonals. Adjust until they match exactly.
  4. Anchor the base to your foundation using the provided brackets or suitable screws for your surface type (concrete, pavers, or wood).
Assembling the base frame

Step 2: Assemble the Side and Back Walls

Next, we’ll build the wall frames that attach to the base.

  1. Identify each wall frame section using the labeled aluminum parts. Start with the back wall.
  2. Insert the vertical supports into the base frame channels, securing each with T-bolts and nuts.
  3. Add the horizontal connectors to complete the wall frame rectangles.
  4. Slide the polycarbonate panels into the channels. Make sure the fluted sides of the panels run vertically so moisture can drain properly.
  5. Repeat the same process for the side walls.

For the Growers Edition, you’ll notice that the walls are taller than the standard MONT models. These connect in the same way, just with additional bracing at the midpoint.

  • Once all walls are assembled and loosely attached, we’ll move on to the front frame.
assembling the side walls

Step 3: Assemble the Front Wall

The front wall includes the door frame. Keep the bolts slightly loose until the roof structure is complete. This gives us flexibility when connecting the ridge and rafters later.

  1. Attach the door jambs and header using the provided brackets.
  2. Install the short wall panels beside the door opening.
  3. Check alignment of the door frame before tightening all connections.

Step 4: Assemble the Roof Frame

The roof assembly is one of the most important parts of the build.

  1. Position the ridge bar on top of the wall frames.
  2. Attach rafters one at a time, securing them to both the ridge and wall frames. Start at the center and work outward.
  3. Install roof purlins across the rafters for stability.
  4. Slide in the roof panels, ensuring the flutes face downward for water drainage.
  5. Secure the panels using the glazing strips and caps included in your kit.

For Mojave models, the reflective roof panels install exactly the same way. Their coating helps reduce interior heat during hot months.

  • Use a step ladder and work carefully from both sides to avoid overreaching.
assembling the roof frames

Step 5: Assemble and Install the Doors

Now we’ll move on to the doors.

  1. Assemble the door frame by connecting the vertical and horizontal aluminum bars.
  2. Attach the door hinges to the frame using the pre-drilled holes.
  3. Mount the doors to the front wall frame and check for smooth opening and closing.
  4. Install the door handles and latch.
  5. Ensure both doors align evenly in the frame. Adjust hinges if needed before tightening everything.
assembling the doors

Step 6: Install the Roof Vents

Ventilation is essential for regulating greenhouse temperature.

  1. Assemble each vent frame using the provided aluminum pieces.
  2. Insert the vent panels into their frames.
  3. Attach the vent frame to the roof opening and secure with bolts.
  4. Install the automatic openers by attaching one end to the vent frame and the other to the roof support.
  5. Automatic vent openers expand with heat, allowing your greenhouse to self-ventilate without electricity.

Step 7: Mojave Fan and Shade Cloth (Mojave Models Only)

If you have a Mojave model, we’ll now install the fan and shade cloth.

Fan Installation

  • Locate the pre-cut opening at the upper rear wall.
  • Mount the fan using the included brackets and hardware.
  • Plug into a 110V power source.

Shade Cloth Installation

  • Unroll the shade cloth and position it inside the roof.
  • Use the included clips to attach it to the frame.
  • Adjust tension so it sits evenly.

Step 8: Finishing Touches and Sealing

We’re almost done. Once finished, step back and admire your new greenhouse. It’s now ready for planting and year-round growing.

To complete your greenhouse:

  • Apply weather stripping along all panel seams and door edges.
  • Run a bead of silicone around corners and joints to prevent leaks.
  • Recheck all bolts and screws for tightness.
  • Clean any fingerprints or residue from panels with mild soap and water.
finishing and sealing

Have any questions or would like to place an order? We'd love to help! Chat with our friendly customer service team by calling 1-844-945-3625, chatting in on our website or email us at customersupport@wildoaktrail.com. We look forward to hearing from you!


Frequently Asked Questions

How long does it take to assemble a MONT Greenhouse?

We recommend setting aside 8 to 12 hours with two people.

Can we build it on grass or soil?

We don’t recommend it. A level concrete or wood base is best.

Do the roof vents open automatically?

Yes, both models include automatic vent openers.

How do we power the Mojave ventilation fan?

The fan plugs into a standard 110V outlet.

Cliff Co
Cliff Co

Cliff, a passionate storyteller and hardcore seller, here to share insights and knowledge on all things prep. He firmly believes in only selling things he'd use himself, making sure only the best get to his readers' hands.

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