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Detailed Specification

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

Product Name: 12 x 8 (3.57m x 2.48m) Mercia Overlap Shed 
Footprint (Depth x Width): 3.57m x 2.48m (11'7' x 8"1")
Height To Ridge: 2.12m (6'9")
Height To Eaves: 1.56m (5'1")
Walls: 7mm Overlap
Door: Double
Door(s) Height x Width: 1.66m x 0.88m (5'4" x 2'8")
Lock: Turn Button
Roof: 8mm Solid Sheet Board
Roofing Felt: Green Mineral Felt
Floor: 10mm Solid Sheet Board
Bearers: 27mm x 32mm
Bearers Direction: Front To back
Window(s): 4 x Fixed Styrene Clear Glazed (Can Be Fitted To Either Side)
Framing 28mm x 28mm
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: 5029442075136
Manufacturer: Mercia




If you are looking for ways to stretch your budget when it comes to buying a garden shed with an impressive interior storage space, it is hard to find more value than is offered by the 12 x 8 Mercia Overlap Shed. With double doors and four fixed styrene windows, this garden building is a popular choice among elbec's range for obvious reasons. Read more details about this shed below to decide whether this is the right shed for your garden.


The double doors of this model open wide for an easier time entering with the larger items - like wheelbarrows or bicycles - that this more spacious building is capable of storing. When not in use, a simple clasp allows for them to stay shut. If you plan to add a lock to the shed, you will be pleased to know that the double doors are ledged and braced for greatly improved strength.

Four fixed styrene windows are included with the 12 x 8 Mercia Overlap Shed, and create a light and airy interior that makes using the shed a far more comfortable experience. The styrene used for the glazing is highly resistant to shattering as some glass is prone to do, a detail that may be worth considering if your garden also hosts children's ball games.

The bedrock of the 12 x 8 Mercia Overlap Shed's construction is arguably the 28mm x 28mm timber framing that makes the shed so stable. This backs up the 7mm timber cladding used throughout the side walls of this shed, and all timber used is of course FSC certified to ensure your peace of mind if you are sustainably-minded.

8mm solid sheet board is also used for the shed's roof and floor, a rugged material that is an oriented strand board similar to plywood, but with a far higher shear strength that makes it ideal for the shed's construction purposes. This material is water resistant, and gives an excellent level of cover for stored items when paired with felt lining included with this shed.

Additional Information

Your 12 x 8 Mercia Overlap Shed is supplied in parts, with an easy to follow instruction manual that shows you how to assemble the shed at home. Putting the shed together may be easier with an extra pair of hands in the form of a friend, and may take one or two days to finish depending on your level of DIY experience. Completing the assembly process can be hugely satisfying, and you should soon apply the wood preservative needed to ensure your 10-year anti-rot guarantee will remain valid. Examine the details of this guarantee with care to ensure you can make use of this coverage if ever necessary.

Key Features

  • Free UK mainland delivery
  • 10-year anti-rot guarantee from the manufacturer Mercia
  • 28mm x 28mm timber used for sturdy internal framing
  • Four fixed styrene windows that are virtually shatterproof and transparent
  • 'Pick a day' deliver option makes home delivery straightforward
  • 7mm timber overlapped cladding with the rustic look of traditional sheds
  • Double doors that are ledged and braced
  • FSC certified timber that is sustainably sourced
  • Choose from a fantastic range of product options and wood treatment from Protek when making your order


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.

Customer Reviews

Write A Review
"very happy: very happy with my order would order from them again fast and prompt delivery thank you ,neil"
Star Rating 5
"SPEEDY SERVICE: To Customer Care,Thank you very much for the speed in which you processed the order ,but we seem to not have the roof felt for the shed. look forward to hearing from you From E. Gallagher"
Star Rating 4

12 x 8 (3.57m x 2.48m) Mercia Overlap Shed

Was £979.99 Now £899.99
NEW - Guarantee - 10 year - gold

Product code - 20010020

Description Information

The 12  x 8 Mercia Overlap Shed can maximise your available storage space for items you want to store in your garden, such as gardening implements or bicycles. The reason for this shed being one of our most popular sheds is soon made clear, thanks to the following features:

  • 7mm timber cladding in overlapped style that looks charming and diverts rainfall from your stored items
  • Four fixed windows that utilise styrene, a tough material that is incredibly hard to shatter
  • Free delivery and a 10-year anti-rot guarantee are welcomed additions
  • A solid sheet roof and floor protect items with their rugged construction

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:

  • 12ft x 8ft Mercia Overlap Garden Shed£899.99