How to Build a Small Greenhouse Using Refurbished Windows
Thinking about nurturing your plants or starting a mini garden but don’t want to break the bank? Building a small, functional greenhouse with refurbished windows is an eco-friendly and affordable solution! Plus, it’s a fun DIY project that brings a charming, vintage vibe to your garden. In this guide, I’ll walk you through the steps to create your very own small greenhouse with an A-frame roof, using recycled windows, sturdy wood, and a few handy tips.
Table of Contents
Gather Your Materials
Designing Your Greenhouse
Preparing the Foundation
Building the Frame
Attaching Windows & Creating the Roof
Adding Hinges and a Handle
Final Touches and Tips
Gather Your Materials
Before you start, gather the necessary supplies:
Refurbished windows (preferably double-glazed for insulation)
Wood for the frame (snug, weatherproof lumber like cedar or pressure-treated pine)
Thick greenhouse plastic (for the A-frame roof)
Hinges (preferably rust-resistant)
Handle for the door
Bricks or paving stones (for building on a sturdy base)
Tools: hammer, screwdriver, drill, saw, measuring tape, level
Optional: weatherproof sealant
Designing Your Greenhouse
Keep it simple and functional. A small square shape (roughly 4x4 feet) works well for limited space. The key features include:
Single door with hinges for easy access
An A-frame roof covered with thick plastic for weatherproofing and light diffusion
Windows arranged to maximize sunlight
Support base built on bricks to prevent direct contact with the ground, keeping moisture away from the wood and windows
Preparing the Foundation
Pro tip: Build your greenhouse on top of bricks or paving stones. This provides a solid, level foundation and promotes drainage, ensuring your structure stays dry and lasts longer.
Lay out bricks in a square or rectangular shape according to your desired size
Level the bricks carefully using a spirit level
Ensure the top surface is flat and stable before assembling the frame
Building the Frame
Construct a sturdy wooden frame that will support your windows and roof:
Measure and cut four vertical wooden pieces for the corners
Connect these with horizontal pieces to create the base and top frame
Add support beams where necessary for extra stability
If you’re handy, sand and treat the wood with weatherproof sealant to extend its lifespan
Attaching the Windows & Creating the Roof
Now, the fun part—assembling your windows and building the roof:
Installing Windows: Secure the refurbished windows onto the wooden frame. Use screws and, if needed, add weatherproof sealant around the edges to prevent leaks.
The Door: Attach one window to serve as a door with hinges on one side. This makes accessing your plants easy and natural.
The A-Frame Roof: Create the roof by attaching two angled pieces of wood that meet at the top, forming the classic pyramid shape.
Cover the roof frame with thick greenhouse plastic, securing it tightly to prevent wind damage and keep the heat in.
Adding Hinges and a Handle
To make your greenhouse functional and easy to use:
Attach rust-resistant hinges to one of the windows to serve as a door or opening panel
Install a handle on the door for easy opening and closing
Double-check all fittings to ensure everything is secure and weatherproof
Final Touches and Tips
Once assembled, here's what to do next:
Place the greenhouse on your prepared bricks or paving stones
Seal any gaps with weatherproof caulk or sealant for extra protection
Fill your greenhouse with pots, soil, and your favorite plants
Position your greenhouse in a sunny spot for optimal plant growth
Regularly check for any damage or leaks, especially after storms, and maintain the structure to keep your plants happy year-round!
Conclusion
Building a small greenhouse out of refurbished windows is a rewarding project that combines sustainability, creativity, and practicality. By following these simple steps, you can create a charming, functional space for your plants that adds character to your garden. Plus, you’ll enjoy the satisfaction of transforming old windows into a beautiful, productive addition to your outdoor space. Happy gardening!
