12x12 Shire Mammoth Loglap Shed - Timberdise

12×12 Shire Mammoth Loglap Shed

£2,299.99 £2,199.99 Inc VAT

Out of stock

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Please see below for lead times on buildings:

Garden Rooms - 8 to 10 weeks
Economy Cabins - 4 to 8 weeks for most economy cabins but please contact us if you require a more exact lead time
Premium Cabins - Currently Unavailable
All other buildings - Currently Unavailable

Due to increased demand and supply delays some buildings remain 'out of stock' for the foreseeable future, for further information please contact us or send us an email to be placed on the priority waiting list!


The 12 x 12 Shire Mammoth is an extremely versatile and durable workshop shed that can help get the most out of almost any garden. The extra strong framework helps to ensure that this is a very sturdy and durable building that is capable of lasting for decades. Concealed hinges and fully framed doors help to ensure extra security and peace of mind.

The Shire Mammoth Professional Shed is ideal for all manner of working equipment or just for people who like (or need) lots of space to work in. The large fully opening window(s) make the Mammoth shed a perfect working environment, while the double doors allow easy access. If you are looking for a shed that is super strong, multi-functional and will stand the test of time the Shire Mammoth is the shed for you. The Mammoth shed has interchangeable door and window panels which means the panels of the Mammoth Shed can be placed either side or each gable end to suit any individual requirement.

If you are looking for a shed that is super strong, has many security features, is multi-functional, is easy to assemble and will stand the test of time the Shire Professional is the shed for you.

Full assembly instructions are provided with this Apex Shed and with all the fittings in the box as standard you will be amazed at how simple this professional shed is to install. Assembly instructions are available upon request. You can of course choose the option to have your shed installed for you.

Timber – You will be impressed by the use of natural products and the environmental credentials used on this Professional shed. A high quality timber garden building starts with high quality timber, so it is important to know exactly what timber is being used for your garden shed. The most commonly used timber for garden buildings is pine as this is widely available for a very cheap price, however all our professional garden buildings are constructed using high quality spruce and is sourced from Siberia and Scandinavia under strict FSC guidance. Spruce is more durable than pine and provides a higher quality finish. The timber is slow grown unlike fast grown British timber, being slow grown timber means a tighter grain, less sap and with far less knots and warping occurring. The timber used on the Professional garden buildings is therefore a more durable timber that will last much longer than other timbers used on garden sheds. Spruce is therefore the timber of choice for companies who always look to produce the best garden sheds.

Walls – Specially designed spruce shiplap tongue and groove cladding of 12mm x 120mm or choose the 19mm loplap product producing a shed that is not just durable but also looks great in your garden. Also our planed tongue and groove shiplap cladding design closes the pores and together with its curved profile promotes the run-off of water making the shed more water resistant.

Frame – A robust planed 70mm x 44mm (3″ x 2″) framework (walls and floor) it the framework of a garden shed that gives the building its strength.

Please Note: There is also the option to have a Tongue and Groove Pine Log Pattern 19mm x 114mm wall finish

Floor – The floor is manufactured from high quality 16mm x 120mm planed pine tongue and groove matching pattern boarding on 70mm x 44mm (3″ x 2″) joists.

Roof – The roof is manufactured from high quality 12mm x 120mm planed pine tongue and groove matching pattern boarding. Tongue and Groove roof provides better insulation and gives a smarter finish. Roofing felt is supplied as standard.

Windows – The opening shed windows are glazed with 3mm Horticultural Glass. The glass is retained by profiled beading which is pre-mitred (no awkward corners to be cut). All windows use one of the strongest joints in woodwork, they are properly morticed and tenoned profiled and weather resistant. The windows have a unique profiled ‘lip’ which covers the aperture of the opening in the panel making it weather resistant. Casement stays have two levels of opening and are supplied fitted. Being a modular build the window panels are interchangeable and can be fitted on either the front width or the gable end (length). These large windows allow plenty of light to flood into the shed. The windows are supplied with factory fitted window frame(s) for quick and easy assembly when delivered. (Refer to the specification for total number of windows per size).

Joinery Doors – The extra high doors are fully ledged, braced and framed for extra strength and security. With a joinery door all joints are mortice and tenon, the timber is pressed together in a pneumatic press and then pinned together to give them extra strength, unlike other sheds where the doors are screwed together. The doors have a lip all the way round therefore leaving no gaps thus helps to prevent against certain weather conditions. As a security measure the doors are fitted with stormproof hinges which are strong and with the added benefit of not being visible from the outside provides extra security for the shed and offers a better looking shed. The storm hinges also give a smoother operation as they are less likely to get wet. The doors are pre-hung at the factory for quick and easy assembly when delivered.

Treatment – The Shire Professional Garden Sheds are supplied pre-treated with a base coat to both sides in a golden brown water based industrial product (colour can vary from the picture shown). The manufacturer recommends that you apply a top coat of your choice. This will protect the timber from weathering on your shed making it last longer and will need to be repeated accordingly in relation to the manufacturer’s instructions.

IMPORTANT INFORMATION: This Shire product is built to order. If you cancel your order at any time after production has commenced you will be liable for the cost of work in progress to date of cancellation. If you cancel an order after it has been despatched you will be liable for the cost of the building and the cost of return unless in the unlikely event the building is faulty.

About The Shire Professional Range:

We are proud of our Shire Professional range of sheds and the range has endeavoured to consider all details in the design using quality fixtures and fittings, all exterior fittings are treated against rust. These sheds are produced to the highest standards using quality timber from sustainable sources.

The manufacture of our Professional Sheds is the UK’s leading and one of the oldest established manufacturer of garden buildings, they are the proud manufacturer of the largest timber garden building range produced in the UK. Their range includes Garden Sheds, Log Cabins, Eco Homes, Home Offices, Sheds, Workshops, Summerhouses, Playhouses, Arbours, Storage units and Pet houses. Their UK production facilities cover some 23 acres and include huge undercover stock holding facilities, an advanced high speed timber planing mill, modern well equipped joinery production facility and semi-automated production lines. All Shire garden buildings are manufactured in the UK using the finest spruce timber, imported directly and machined through the most up to date machines to ensure the best quality and best value for money garden sheds in the UK.

Full Specification

Product Name 12 x 12 (3.73m x 3.59m) Shire Mammoth Professional Apex Shed 
Footprint (Depth x Width) 3.73m x 3.59m (12’2′ x 11’9′)
Height to Ridge: 2644mm (8’8′)
Height to Eaves: 2040mm (6’8′)
Walls: 19mm Loglap
Door: Double Doors
Door(s) Height x Width (Aperture): 1805mm x 1420mm (5’11’ x 4’8′)
Lock: Rimlock and Door Set
Roof: 12mm Tongue and Groove
Roofing Felt: Green Mineral
Floor: 16mm Buffalo Tongue and Groove
Bearers: 70mm x 44mm (3′ x 2′)
Bearers Direction: Parallel to 12ft
Window(s): 1 x Opening Window with 3mm Horticultural Glass
Framing 70mm x 44mm (3′ x 2′)
FSC Certified YES
Free Delivery YES*
Installation Available YES

Key Features

  • Looking for a long lasting and high specification Workshop then the Mammoth Shed is the right choice.
  • FREE Delivery to the UK Mainland*.
  • Tongue and groove shiplap walls provide an impressive finish while also aiding water run-off, or upgrade to 19mm log pattern boarding for an even more stylish and attractive appearance.
  • 16mm buffalo tongue and groove floor is strong and hard-wearing.
  • 12mm tongue and groove roof provides extra insulation.
  • 70mm x 44mm (3′ x 2′) extra strong framework is used throughout, making a sturdy and long-lasting apex shed (no sharp edges).
  • large opening proper joinery window(s).
  • Glass is used so you can rely on the clarity of your windows for years to come.
  • All panels and window panels are interchangeable.
  • Extra high eaves to provide extra head room and also make it easier to store taller items.
  • Extra high joinery double doors are braced, ledged and fully framed for increased security and strength.
  • Factory fitted doors and window frame means you don’t need to be a professional to assemble a professional shed.
  • Supplied dip-treated in a golden brown finish.
  • 10 Year Anti Rot Guarantee for peace of mind.
  • High grade slow grown timber means a tight grain giving extra strength, a much longer life and superior build quality that looks attractive in the garden.
  • Forest Stewardship Council (FSC) Certified timber is used throughout to produce an environmentally friendly garden building.
  • Delivered flat packed with comprehensive instructions, fittings and roofing felt to ensure installation is as straightforward as possible.
  • All buildings are hand-made to order.
  • Made to Measure Service on the Mammoth Shed to whatever size and style you require.
  • Optional assembly available.



FREE delivery is offered to the majority of mainland UK postcodes but some areas may incur a surcharge and some postcode areas are not covered at all. Please check your postcode in the ‘Delivery cost checker’ above to confirm availability and any possible surcharges.

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 manufacturers 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

Delivery of this item is typically made by a 7.5 ton flat-bed (similar size to a council refuse lorry). Delivery is typically between 7am and 7pm. The delivery drivers are only insured to deliver to kerb side or driveway. We would not risk damaging your property whilst delivering a product. Unfortunately we will not be able to go through your property. Deliveries may be either hand-balled off by the driver and some may be craned off if the vehicle delivering has a hi-ab. We cannot guarantee which type of vehicle will deliver to you.

Booking Delivery

After placing an order you will be contacted within 1-2 working days either by a text message or automated telephone message (the latter if a mobile number is not supplied). This message will supply you with the name of the booking website which you will be requested to go on to book your delivery date.

Installation option

If you are choosing the installation option after placing your order you’ll be contacted within 1-2 working days either by a text message or automated telephone message (the latter if a mobile number is not supplied). This message will supply you with the name of the website to go on to where you will be required to accept the terms and conditions for assembly. Any delay in accepting these terms and conditions may affect your timescale. Once you have accepted these terms and conditions you will be contacted during the timescale with a date for the delivery/assembly of your order. The installation option will extend your lead time by up to 15-20  working days. This may take longer during seasonal periods. Please be aware that the installation team will require full access to your garden. Our Installation team will not bring a building through your home as they are not covered by insurance to enter a customer’s home.

Custom Made - Bespoke service

If we don’t have the exact size building you require don’t worry as we can make any building to the size you require.

We do this across the range so it doesn’t matter if it is a log cabin, playhouse, summer house, shed etc etc we will build it to the size you require. We also will also custom make buildings to a different design if there is something specific you want in terms of style.

We can add and take away windows and doors to suit your requirements. All you need to do is get in touch.

Please feel free to call us on 01302 811838 or send us an email at support@timberdisegardenbuildings.co.uk for your free quote.

Anti-Rot Guarantee

All of the wooden garden buildings at Timberdise come with an anti-rot guarantee for peace of mind that your new garden building will be around long after we have supplied it. All buildings come with a 10 year anti-rot guarantee apart from the pressure treated range as these come with a 15 year anti-rot guarantee.

Most of the wooden garden buildings we supply come with a pre-coat of treatment that we like to call transportation protection. This protects the buildings from the elements as we deliver them to you and also gives you a small period of time from installation to actually getting the building treated yourself so that the building is not exposed during this crucial stage of its life (this does not include log cabins and garden rooms). Log cabins and garden rooms come without any treatment so make sure you treat these buildings within the first week of them being installed.

We at Timberdise will always advise you to treat your new wooden garden building as soon as you possibly can and ask that you continue to treat the building at least every 12 months there after. This is to ensure you get the maximum life span out of the building and prevent any premature rotting. We also advise you that to keep your guarantee valid you do have to treat both inside and outside of the buildings as most buildings don’t come with any damp protection.

Please have a look at the aftercare details we have available on this site by clicking here Aftercare for Sheds, Summerhouses & Playhouses and Aftercare for Log Cabins for further information.

If you have any further queries please do not hesitate to contact us.


At Timberdise we offer a 14 day money back guarantee on all of our items. The guarantee commences from the date which you receive your item and we even offer a free collection service as part of this agreement.

The building must be returned in its original, untreated, resalable condition. Until the item is collected by our courier, it’s the responsibility of the customer to ensure that the building remains in this condition.

We will not however dismantle on your behalf and we cannot be held liable for any third party costs. Once the building has been received by our factory and checked, a full refund will be issued within 7 working days providing all of the above conditions are met.

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