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Detailed Specification

Standard Specifications for the 4m x 3m Mercia Grizedale Log Cabin 19mm Logs

Please note: The Table below shows the specification for the 4m x 3m Mercia Grizedale Log Cabin in 19mm Logs. The metric measurements given for the name of this cabin are only approximate and customers should carefully check the specification table below for the exact dimensions of this garden building, given in both imperial and metric. 

The base measurements do not include any roof overhangs. The 'G' on the log cabin sizes means the 'gable end' which is the depth for the Grizedale Log Cabin. These log cabins are supplied untreated.

Product Name 4m x 3m (12ft 6in x 9ft 2inG) Mercia Grizedale Log Cabin 19mm Logs
Footprint External Base (Front Width x Depth)* 3809mm x 2799mmG (12'6" x 9'2")
Footprint Internal Base (Front Width x Depth) 3772mm x 2760mmG (12'5" x 9'1")
Front Roof Overhang: 150mm (approx)
Side Roof Overhang: 120mm (approx)
Height to Eaves: 2210mm (7'3")
Height to Ridge: 2597m (8'6")
Floor Included: Yes
Floor Thickness: 12mm Tongue and Groove
Floor Bearers: 44 x 44mm Pressure Treated (approx) left to right bearer direction
Roof Thickness: 12mm Tongue and Groove (approx)
Roof Joists: Information currently unavailable
Window and Door Joinery: Information currently unavailable
Door: Double Doors
Door (Height x Width): 1.88m(H) x 1.5m(W) (6'3" x 4'11")
Number of Windows: 3 Opening Windows
Window Glazing: 2.8mm SAN Styrene
Window (Height x Width): 1.2m(H) x 0.61m(W) (3'11" x 2'0")
Door and Window Reversible: N/A
Positioning of Window Hinges: Hinged at the Top
Roofing Felt: Yes - Mineral Felt)
Roof Felt Weight per sq.m (approx): Information currently unavailable
Roofing Felt Tiles: TBC
Upgrade to Toughened Glass: N/A
Upgrade to Double Glazing: N/A
Additional Side Window: N/A
Window Boxes: N/A
Terrace: N/A
Veranda: N/A
Assembly: Optional
Other Sizes Available: No
Bespoke and Made to Measure Service Available: No
EAN Number: 5029442000978
Manufacturer's Guarantee: 10 Year Anti-Rot
Manufacturer: Mercia


* Excludes Roof Overhang


The 4m x 3m Grizedale Log Cabin from Mercia is the perfect way to add some style to your garden while giving you plenty of new space to use for work or leisure. With an open and spacious interior that is also bright and airy because of its three opening windows and double doors, spending your time in the Grizedale is a real pleasure, whatever you decide to use it for.

At elbec, we are confident that our log cabins are the perfect way to make the most of your unused garden space and provide a wonderful spot to relax or work in comfort all year round.

Ways to Make the Most of Your Grizedale Log Cabin

There are loads of ways to make the most of a Grizedale Log Cabin. The open and spacious interior gives you plenty of useable space for whatever you have in mind. Its opening windows also give the advantage of controlling the temperature inside your cabin. Throwing them open in the summer to allow a cool breeze or shutting them in the colder months to seal you away from the elements will really enable you to get the best out of your log cabin. There are few better backdrops to a gathering of family and friends than a log cabin, giving you the perfect place to relax over dinner and drinks or host a lively summer BBQ. Alternatively, the Grizedale could provide the perfect place to get away from the distractions in your home to get some work done away from it all. Whether as a home office or as somewhere to concentrate on a hobby like painting or model making, the quiet, garden atmosphere may be exactly what you need to help you focus. With all the extra space the Grizedale provides, the only problem you will have is deciding what to do with your new log cabin and we are sure you will love making the most out of the Grizedale however you decide to use it.

Why the Grizedale Might Be For You

Offering a generous amount of interior space, the Grizedale is ideal for anyone looking to add lots of extra usable space to their homes by making the most of otherwise wasted parts of your garden. With full length double doors that open wide for easy access and three opening windows as part of the package, the Grizedale is perfect for lovers of bright, airy and open space. This gives you an interior that is sure to lift your mood, particularly as the windows and doors combine to provide fantastic views of the rest of your garden. The reverse apex roof offers that little distinctive touch that has proved very popular with customers and is part of the reason why this design choice is a best seller. The tongue and groove roof, floor and walls provide the stunning timber finish to the interior that means you will notice the quality of the cabin as soon as you step inside. It really is hard to beat the attractive, wood finish of a log cabin. Our customers often like to personalise their log cabins by painting them. Many manufacturers recommend that you use Protek paint, available from elbec in a wide variety of colours. By using Protek Royal Exterior, you can make the Grizedale Log Cabin look exactly how you want it while adding important extra protection to the timber. Whether you favour a more traditional log cabin look, for which their range of ‘natural’ colours would be appropriate, or a more colourful, modern look, Protek have a colour to suit any taste.


The Grizedale Log Cabin boasts a number of features that show its quality, but has been designed to offer a more affordable option for your garden. Supplied as standard with heavy duty roofing felt, this creates a weather barrier and helps to prevent wood rot and weather damage. The 19mm Tongue and Groove cladding ensures that the Grizedale is snug on the inside and sealed away from the elements. The interior is further sealed from the elements by the log cabin’s overlapping corners, with its four way corner joints also adding stability and durability to the Grizedale. The windows and doors are fitted with 2.8mm SAN styrene, ensuring a safer, more secure window pane. The double doors are secure and lockable with a key supplied. This provides valuable extra peace of mind, particularly when leaving items in your cabin overnight. Sturdy, pressure treated floor bearers provide additional support for your log cabin as well as helping to protect against damp and rot. 12mm tongue and groove roof and flooring completes this quality log cabin package, providing you with a sturdy, durable roof and a robust floor that can support heavy loads. We’re pleased to offer the option of booking our dedicated professionals who will assemble your log cabin quickly and correctly. However, you can choose to use the comprehensive instructions included with the log cabin and construct it yourself.

About Your Log Cabin Order

If you think that a Mercia Grizedale Log Cabin would be perfect for you, take a look at our delivery information. If you would like any extra details, feel free to email us to discuss your order and our full range of product options, or better still, give us a call so we can find the perfect log cabin to suit your needs.

Alternatively, why not visit us at our Brookfields Garden Centre showsite near Nottingham? One of our helpful advisors will be on hand to show you around or to help guide you through your order in person. Though if there is a particular garden building you would like to see, we recommend contacting us in advance to find out if we have it, or one similar, on site.

The footprint of the external base of this Grizedale Log Cabin is 3809mm x 2799mmG. This measurement excludes roof overhangs. Full measurement details can be found in the detailed specification.

All Mercia Log Cabins are supplied untreated. You must apply a wood treatment to the exterior. Many manufacturers recommend Protek wood treatment, available from elbec in many different colours. This will protect the timber from weathering, making it last longer. The timber treatment will need to be repeated periodically in line with the manufacturer's instructions.

Key Features

  • Contemporary appearance with stylish reverse apex roof
  • Double doors supplied with mortise lock and key for extra security
  • Sturdy construction protecting the inside from the elements
  • Includes a 10 year anti-rot guarantee
  • 19mm tongue and groove cladding ensuring the interior is snug
  • 3 opening windows each fitted with durable SAN styrene

  • 3/4 length glazed double doors fitted with durable SAN styrene

  • Supplied with green mineral roofing felt, creating a weather barrier and helps prevent wood rot and weather damage
  • Four way corner joints adding stability and durability
  • Sturdy floor bearers provide additional support for  as well as helping to protect against damp and rot
  • 12mm tongue and groove roof that is sturdy and durable
  • 12mm tongue and groove flooring gives a robust floor that can support heavy loads



Booking Delivery

You will be required to book your delivery date at the time of placing your order. 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 post code 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.

You'll be contacted on the morning of your delivery date either by text or email with a 2 hour delivery slot. You will also be contacted by the driver 30 minutes before the delivery location.

Please note: for Mercia Metal and Mercia Plastic 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.

Delivery Leadtimes

The estimated delivery lead time for this product is identified on the product page above. Lead times are in working days (Monday - Friday) excludes Bank Holidays. These estimated lead times are provided by the manufacturer and are not guaranteed - due to fluctuation in demand - but are provided in good faith and are representative of delivery at that time. Some remote areas will take a little longer.

Upon Delivery

Your order is delivered either kerbside or driveway and will be delivered on a 17 ton lorry (the size of a Refuse Cart). 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 un-safe 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.

Installation Option

The leadtime for our installation option around 8 weeks.  With the installation option, some orders will have delivery and installation on different days, and some orders will have installation and delivery on the same day.  You will be advised by the manufacturer's installation team which category your order falls in to.

Within 3 working days of placing your order, you will be sent an installation questionnaire to complete and subsequently contacted with an installation date.

4m x 3m (12ft 6in x 9ft 2inG) Mercia Grizedale Log Cabin - 19mm Logs


Product code - 20050025


Description Information

The 4m x 3m (approx) Mercia Grizedale Log Cabin is a stunning garden building with an open and spacious interior that makes spending time inside a real pleasure. Certain to add a touch of style to your garden, the key features of this design include:

  • Stylish, reverse apex roof that is a very popular design choice

  • Features 3 opening windows and full-length double doors all fitted with durable SAN styrene

  • Double doors are supplied with a mortise lock and key for extra security

  • Includes a 10 year anti-rot guarantee in addition to its sturdy construction

View full specification Delivery

Usually delivered within: 40 Working Days.

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

Choose additional options
Protek Royal Exterior Superior Wood Finish for Mercia Products
Protek Royal Exterior Superior Wood Finish 5 litres - Sage Leaf£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Slate Grey£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Mendip Mist£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Silver Grey£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Eggshell Blue£46.00
Protek Royal Exterior Superior Wood Finish 5 litres - Anthracite Grey£46.00
OUT OF STOCK - Protek Royal Exterior Superior Wood Finish 5 litres - Golden Oak£46.00
Protek Wood Stain and Protector for Mercia Products
Protek Wood Stain and Protector 5 litres - Teak£20.00
Protek Wood Stain and Protector 5 litres - Chestnut£20.00
Protek Wood Stain and Protector 5 litres - Silver Fir£20.00
Protek Wood Stain and Protector 5 litres - Sky Grey Blue£20.00
Protek Wood Stain and Protector 5 litres - Gun Metal Grey£20.00
OUT OF STOCK - Protek Wood Stain and Protector 5 litres - Soft Sage£20.00

Your choices:

  • 4m x 3m Mercia Grizedale Log Cabin - 19mm Logs£1,299.99