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    Palram Canopia Sun Room 8x20 Lean to Greenhouse

    Transform your garden into a thriving oasis with the Palram - Canopia Sun Room 8 x 20 Lean to Greenhouse. Enjoy optimal growing conditions and protection from the elements, backed by a 5-year warranty for peace of mind.

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    Add Palram - Canopia Ventilation?

    Palram Canopia Automatic Vent Opener
    + £45
    Qty 1

    Palram - Canopia Ventilation information

    Palram - Canopia Automatic Vent Opener - £45.00
    Palram - Canopia Automatic Vent Opener

    Add an autovent that will automatically open your roof vent to ventilate your greenhouse.


    The Palram - Canopia Sun Room 8 x 20 Lean to Greenhouse is tough and ideal for the UK’s often blustery, wet weather. The Sun Room is perfect for adding more space to your house for relaxing in and growing plants.

    The Palram - Canopia Sun Room 8ft x 20ft lean-to is made from white poly resin which won’t bend or discolour like aluminium. Complete with it’s crystal clear side glazing to let in light and the 4mm polycarbonate glazing for the roof it offers great growing conditions whilst protecting your plants from scorching from excessive UV rays .This greenhouse weighs in at 273 lb’s making it a good sturdy weight which will help it to survive harsh wind and snowy conditions.

    • Easy to Build
    • 2.58m (8ft 5") Wide Greenhouse
    • White Thick Resin Frame
    • Barn Shaped Roof
    • Twin Wall Polycarbonate Roof
    • 3mm Clear Acrylic Side Panels
    • Lockable Hinged Side Door
    • Door can go either side
    • 1 Opening Roof Vent
    • 5 Year Warranty

    1-Man Deliveries: Your new Palram Shed or Greenhouse will be delivered within 3-5 working days.

    2-Man Deliveries: Larger items will be delivered within 7-10 working days.

    You will receive a text message from Arrow XL to schedule your delivery. Please respond as soon as possible to ensure prompt delivery.

    Greenhouse Size Diagram

    Greenhouse Dimensions

    A: Greenhouse width

    2580mm (8′ 5″)

    B: Greenhouse depth

    6320mm (20′ 8″)

    C: Ridge height

    2660mm (8′ 8″)

    D: Eaves height

    1870mm (6′ 1″)

    E & F: Door Size

    805mm (2′ 7″) x 1860mm (6′ 1″) (aperture)

    Minimum Base Size

    2580mm (8′ 5″) x 6320mm (20′ 8″)

    How to Prepare the Ground for a Greenhouse Base

    How to Prepare the Ground for a Greenhouse Base

    A solid base is the backbone of any greenhouse. You might think skipping this step saves time, but trust me—I've seen plenty of greenhouses fail because of poor foundations. A dodgy base causes more headaches than you'd believe.

    What happens with a bad base? Glass cracks. Doors jam. The structure twists. Water pools where it shouldn't. And fixing these problems costs way more than doing it right first time.

    Read More

    Best Position for a Greenhouse UK

    Best Position for a Greenhouse UK

    Placing your greenhouse in the right spot makes all the difference between thriving plants and disappointing results. As a greenhouse specialist who's spent 15 years helping UK gardeners optimise their growing spaces, I've seen first-hand how position affects everything from temperature regulation to plant health.

    Let me share what actually works in our unique British climate. The greenhouse position might seem like a minor detail, but it's one of those things that can make or break your growing success. I made this mistake myself when I first started - my poorly positioned greenhouse meant I was fighting an uphill battle with inadequate light and temperature fluctuations.

    Read More