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Detailed Specification

Please note: all imperial measurements are approximate and the Mercia garden buildings are made from metric measurements.

Product Name: 20 x 10 (6.03m x 3.09m) Mercia Modular Overlap Workshop Shed
Footprint (Depth x Width): 6.03m x 3.09m (19'9' x 10'1')
Height To Ridge: 2.25m (7'4')
Height To Eaves: 1.57m (5'1')
Walls: 7mm Overlap
Door: Double
Door(s) Height x Width: 1.78m x 1.33m (5'10' x 4'4')
Lock: Turn Button
Roof: 8mm Solid Sheet Board
Roofing Felt: Green Mineral Felt 
Floor: 9mm Solid Sheet Board
Bearers: 0.027m x 0.032m (0'1' x 0'1')
Bearers Direction: Front to Back
Window(s): 8 x Styrene Clear Glazed (Can Be Fitted To Either Side)
Framing 0.028m x 0.028m (0'1' x 0'1')
Portabases Available: N/A
Eco Bases Available: N/A
Number Required: N/A
Manufacturers Guarantee: 10 Year Anti-Rot Warranty
FSC Certified: Yes
Free Delivery: Yes
Assembly Available: No
EAN Number: 5029442075204
Manufacturer: Mercia


For those who would prefer to not worry about running out of outdoor storage space, there are few solutions better suited to storing near-endless items than the 20 x 10 Mercia Overlap Workshop Shed. This ample space is also perfect for those with ambitions for DIY home projects, supported by a generous interior headroom due to the 7'4" height to ridge (height to eaves is 5'1"). Read on to learn more of the impressive features that make this workshop a frequent bestseller in elbec's range.


In order to deliver the spacious and high-value-for-money interior of this 20 x 10 Mercia Overlap Workshop Shed, this garden building follows the tried and tested rules of reliable garden sheds, with a felt apex roof and unpretentious overlap timber cladding. This 7mm cladding is dip-treated to give the wood some protection from the elements in the initial phase of its life, although we recommend the addition of a high-quality wood preservative (such as Protek) as soon as possible to ensure the timber flourishes and lasts many years without water damage.

A sturdy 28mm x 28mm internal timber frame with extra support beams gives the structural stability needed for the larger scale of this workshop compared to many garden buildings. This also caters for the increased height of the workshop, which offers a generous degree of interior headroom due to a 7'4" ridge height (the tallest point of the apex roof).

All of this space requires plenty of available light for comfort when using the workshop; fortunately, eight fixed windows are included to allow a stunning amount of light within the workshop, and can be placed on the side of your choosing. This ensures you can maximise the available sunlight in your workshop based on its surroundings. These fixed windows feature transparent styrene that is lightweight yet virtually shatterproof, making it a safe option for bustling family gardens where footballs have been known to go AWOL on occasion.

The addition of a workbench in front of a window immediately produces a comfortable workspace that allows you to fall into the world of DIY projects without a problem. In addition to this, a set of double doors make entering or leaving with larger items an easier task.

Additional Information

Upon delivery, your workshop will arrive in a disassembled state with every part and fixture needed to put the garden building together at home. Enlisting the help of a friend will be helpful in assembling your workshop, and elbec suggests allowing a day or two to complete the building depending on your prior experience with similar DIY tasks. A clear and detailed instruction manual is included with the order.

Due to the timber's dip-treatment, your workshop will have a significant degree of protection from the elements when it first arrives. However, be sure to apply a wood preservative to the exterior in due course to make certain you are following the care instructions that Mercia provide to ensure full coverage from the fantastic 10-year anti-rot guarantee.

Key Features

  • Free UK mainland delivery
  • 10-year anti-rot guarantee from the manufacturer
  • Generous headroom thanks to a ridge height of 7'4"
  • Eight fixed windows using tough styrene
  • Ledged and braced double doors
  • Felted apex roof using solid sheet board
  • 7mm overlap wall cladding
  • Dip-treated timber for a good level of initial protection
  • FSC certified timber from sustainable forests
  • 28mm x 28mm internal framing (approx. 1" x 1")
  • Add extra protection with Protek range
  • Choose the side on which you would like to place the fixed windows


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.


Orders with Assembly 

The lead time for our installation option is around 12 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.

20 x 10 (6.03m x 3.09m) Mercia Modular Overlap Workshop Shed

Was £1779.99 Now £1,599.99
NEW - Guarantee - 10 year - gold

Product code - 20010028


Description Information

This is thanks to a no nonsense approach to construction, with all the key features you need to store large items - such as patio furniture and lawnmowers - or get stuck into personal projects. Some of these features include:

  • Eight fixed windows use tough styrene, and flood the interior with sunlight
  • Wide double doors provide easier access for larger items
  • Rustic 7mm overlap cladding has a classic look
  • 10-year anti-rot guarantee from the manufacturer offers plenty of confidence in the product for future years

View full specification Delivery

Usually delivered: Use Pick A Day delivery below for your earliest delivery date to your Post Code.

Note: Currently not available for delivery to Offshore Post Codes.

excludes installation option
Choose additional options
Protek Wood Stain and Protector for Mercia Products
Protek Wood Stain and Protector 5 litres - Gun Metal Grey£29.99
Protek Wood Stain and Protector 5 litres - Chestnut£29.99
Protek Wood Stain and Protector 5 litres - Silver Fir£29.99
Protek Wood Stain and Protector 5 litres - Teak£29.99
Protek Wood Stain and Protector 5 litres - Sky Grey Blue£29.99
Protek Royal Exterior Superior Wood Finish for Mercia Products
Protek Royal Exterior Superior Wood Finish 5 litres - Golden Oak£59.99
Protek Royal Exterior Superior Wood Finish 5 litres - Sage Leaf£59.99
Protek Royal Exterior Superior Wood Finish 5 litres - Silver Grey£59.99
Protek Royal Exterior Superior Wood Finish 5 litres - Clear£59.99
Protek Royal Exterior Superior Wood Finish 5 litres - Eggshell Blue£59.99
Protek Royal Exterior Superior Wood Finish 5 litres - Slate Grey£59.99
Protek Royal Exterior Superior Wood Finish 5 litres - Mendip Mist£59.99

Your choices:

  • 20ft x10ft Mercia Modular Overlap Workshop Shed£1,599.99