Description

Maximise your growing potential, even in smaller gardens, with the 8 x 4 Mercia Woodsman Lean-To Polycarbonate Greenhouse. Designed to fit neatly against a wall or fence, this greenhouse offers a practical solution where space is limited without compromising performance.

Crafted in the UK from sustainably sourced timber, the structure is built with durable 12mm shiplap cladding and a robust 2”x2” frame for strength and longevity. The thermally insulating polycarbonate glazing helps regulate temperature, retaining warmth during cooler months while protecting plants from harsh sun in the summer. Shatterproof and lightweight, it provides a safer alternative to glass, perfect for family gardens.

The pent roof design allows rain to run off easily, while the lean-to style uses an existing wall, helping to capture additional warmth and shelter. A roof vent encourages airflow, preventing overheating and keeping humidity levels balanced for healthier plant growth.

This greenhouse is designed to adapt to your space, with the door panel offering flexible positioning during assembly. It is finished with traditional ironmongery for a classic touch and blends practicality with timeless style. Supplied with all fittings and clear instructions, assembly is straightforward whether you are a seasoned grower or starting your first greenhouse.

It is built to withstand the elements and is protected by a 10-year anti-rot guarantee. It offers a reliable space to cultivate herbs, seedlings, and tender plants throughout the year. With prompt UK delivery, you’ll be ready to grow quickly.

Premium Greenhouse Base

Designed for superior stability, the enhanced greenhouse base offers a 20% wider foundation than standard options, providing a solid, long-lasting support system. This cost-effective upgrade ensures your greenhouse remains sturdy and secure for years to come.

Greenhouse Height Extension

Expand your greenhouse with our Height Extension Pack, designed to increase headroom for greater comfort and ease of movement. The extra height improves air circulation, encouraging healthier plant growth while offering more space for taller plants, hanging baskets, and shelving. This upgrade not only enhances functionality but also creates a more open and spacious environment, making your greenhouse an even more enjoyable place to work.

Also available with different glazing finishes:
8 x 4 Mercia Woodsman Lean to Wooden Greenhouse - Styrene
8 x 4 Mercia Woodsman Lean to Wooden Greenhouse - Toughened Glass

Pre-Painted Options

Save hours of effort with the ready-painted service, allowing you to spend more time enjoying your new greenhouse. Professionally coated in your chosen colour, your building will arrive fully painted and ready to use. For added peace of mind, a 1-litre pot of paint is included for future touch-ups, along with our three-year paint guarantee, ensuring long-lasting protection against the elements.

Colour options:
Castle Green
Clove
Dove
Driftwood
Lakeside
Olive Tree

Features:

Guarantee - 10-year anti-rot

Walls – 12mm shiplap cladding and polycarbonate glazing

Roof – polycarbonate glazing

Frame – 2” x 2”

Windows -  fixed + 1 opening skylight

Doors – the single door can be positioned in any location

Handle – antique style ironmongery and mortice lock (keys supplied)

Treatment - dip treated (application of preservative and waterproof coat required)

Make The Most of Your Wooden Greenhouse

The slimline 8 x 4 design is ideal for making the most of a narrow outdoor space. Position sun-loving plants like tomatoes and peppers towards the back, closer to the warmth of the wall, and keep smaller pots and herbs near the front for easy access. Wall-mounted shelving (available separately) is a great way to utilise the vertical space, helping you grow more without cluttering the floor.

The lean-to design naturally benefits from the heat the adjoining wall retains, but ventilation is still key. Adjust the roof vent and door to regulate airflow and prevent overheating in warmer months. This greenhouse's insulating polycarbonate glazing is perfect for extending your growing season. Start seedlings earlier in spring and keep herbs and leafy greens flourishing well into autumn. With its sturdy timber frame and space-saving layout, this lean-to greenhouse turns even the smallest corner of your garden into a thriving, growing hub.

About Your Order

The Mercia Wooden Greenhouse is a British-made garden building made from sustainably sourced timber. You will get a low-carbon footprint wooden greenhouse made from ethically sourced materials. The practical design makes it straightforward to assemble. It comes with a 10-year anti-rot guarantee and a 12-month manufacturer's warranty.

Superior fixings, and optional assembly from the manufacturer is available. The Greenhouse is flat-packed for easy handling and assembly.

Please note: Images may depict furnishings and accessories; optional potting shelf, these are for illustration purposes only and are not included with your order.

Wooden Greenhouse Maintenance

The greenhouse has timbers with dip-treated base coats to protect them during transit. You must apply a preservative and waterproofing topcoat immediately after installation. Using the treatment after installation, followed by consistent annual treatment of the wooden greenhouse, will maintain the high-quality finish and is a requirement of the 10-year anti-rot guarantee. A 1-year manufacturer's warranty is included as standard.

To treat the greenhouse, elbec recommends Protek wood treatment. Browse our Protek Royal Exterior Wood Finish Paint range to find the best paint colour to add your personalised finish. In the options section, we’ve included popular colours and a Wood Preserver+ for use underneath your colour choice.

About Mercia

Mercia Garden Products are proud to be a British business with over 140 years of experience. They offer a variety of products ranging from traditional garden sheds, summerhouses, playhouses, and garden bars to greenhouses and fencing and garden storage solutions. All their products are manufactured in the UK using timber sourced from sustainable forests and the most advanced manufacturing techniques. Mercia focuses on innovating and improving its products while maintaining customer satisfaction, including ensuring safety for both customers and staff.

The wooden greenhouse’s quality and durability are guaranteed with a 10-year anti-rot guarantee, assuring peace of mind. Regular treatment with a wood preservative is required to maintain this protection, securing the beauty and structural integrity of the timber greenhouse for the years to come.

View other products in Green Houses »

Delivery

ALL DELIVERIES ARE DELIVERED TO KERBSIDE OR DRIVEWAY. All of our Mercia products are delivered flat packed other than fence panels (which are delivered fully constructed), direct to your home, and are supplied with a set of instructions to support assembly.

Booking Delivery

You will be required to book your delivery date at the time of placing your order (except for Metal Shed). Our 'Request a Delivery Date' service is available to the majority of areas and you'll find that the majority of the UK postcodes are FREE but some areas may incur a delivery surcharge and some postcodes are not covered at all. Select a 'requested delivery date' by entering your postcode in the 'Request a delivery date' section above. You will also be notified at this time if your area incurs a surcharge or delivery is not covered in your area.

Prior to Delivery

On the morning of your delivery date, you'll be sent an update by text with an estimated 2-hour delivery slot (this update can only be provided where a mobile number has been supplied on the billing address section at the time of checkout) together with a link to the manufacturer delivery portal where you'll be able to track your order.

Please note: Mercia Metal Sheds ONLY - your order is delivered by a courier you will not be notified prior to the delivery. If you are not in on the day of the delivery you will be carded and asked to contact the courier to arrange a new mutual delivery date. The estimated delivery lead time for Mercia's Metal sheds is identified on the product for the metal shed. Lead times are on working days (Monday - Friday) excludes Bank Holidays. These estimated lead times are provided by the manufacturer. Some remote areas will take a little longer.

Upon Delivery

Your order is delivered either kerbside or driveway and will be delivered on either a 3.5T, 7.5T or 18T Lorry. Unfortunately due to health and safety and insurance liabilities the driver will not be able to take your goods around to the back of your property but may upon request place the product at the side of the house if there are no access or restriction issues. We would not risk damaging your property whilst delivering a product to an unsafe location. Unfortunately, we will not be able to go through your property.

We would recommend against arranging for a third party to install the building before it's been delivered and checked that all parts are present, as we cannot be held liable for any third-party costs.

Pre-Painted Service - Greenhouse Only

If you choose the Painting Service, the estimated delivery lead time will be approximately 28 working days (Monday to Friday, excluding weekends and Bank Holidays). Please note that if you select the Pick a Day option, the chosen delivery date will not apply. Instead, the delivery team will contact you to arrange a new delivery date for your painted shed.

Pre-Painted Service - Greenhouse and Assembly

If you select the Painting Service and Assembly option, please review the section titled 'Orders with Assembly' below for details on the process and associated timelines.

Orders with Assembly 

The lead time for our installation option is around 7 weeks from the date of order. With the installation option, the majority of orders will have their delivery and installation on separate days; there will be a small number of orders which will have delivery and installation on the same day. You will be advised by the manufacturer's installation team which category your order falls into.

Depending on the installation option for your order, you will be contacted within the delivery timescale and given a date for either delivery/assembly on the same date or a separate date for delivery and assembly.

Specification

Quickview

The 8 x 4 Mercia Woodsman Pent Lean-To Polycarbonate Greenhouse features thermally insulated glazing, a space-saving design, and a 10-year anti-rot guarantee. Core features include:

• 1 Opening Roof Window
• Strong 12mm Shiplap Cladding
• Industry-leading 2" x 2" Framing
• Thermally Insulated Polycarbonate Glazing
• Fully Customisable - position doors to suit
• 10 Year Anti Rot Guarantee
• Professional Home Installation Available