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20 x 10 Waltons Groundsman Tongue and Groove Apex Modular Workshop

Now Just: £1,599.99

10 Reviews

20 x 10 Waltons Groundsman Tongue and Groove Apex Modular Workshop

Now: £1,599.99

Buy Now
Click Image to Enlarge 20 x 10 Waltons Groundsman Tongue and Groove Apex Modular Workshop

What is included in the Wooden Shed:

10 Year Anti Rot Guarantee; Designed to offer many years of service

12mm Shiplap Tongue & Groove Cladding; An interlocking design creates a strong, robust and weatherproof panel

100% Shatterproof Styrene Windows; A much safer alternative to traditonal glass glazing, ideal for busy gardens and allotments

12mm Tongue & Groove Roof; A watertight and robust construction that offers additional strength to the overall build

12mm Tongue & Groove Floor; Features an interlocking design for a strong and durable structure, perfect for supporting heavier items and everyday use

2" x 1" Framing; Strong wooden framing provides additional structural support for a rigid and sturdy build

Optional Installation Service; Need help installing your new garden building? Let our professional fitting team take care of it for you

Braced Double Doors; Provide easy access and features 'Z' shaped framing for added structural support

Roof Felt Supplied; Creates a waterproof barrier to help prevent wood rot and weather damage

Added Height; Extra tall eaves and ridge height provide working headroom and space to store larger items

Hasp and staple lock included


Please Note: Sizes are approximate only. For specific details, please consult our technical department.

Imperial Size20 x 10
People Req'd To Build2
Framing2 x 1 (45 x27mm)
Anti-Rot Guarantee10 Years
Cladding StyleShiplap Tongue & Groove
Cladding Thickness12mm
Cladding MaterialShiplap Tongue and Groove
Roof Material12mm Tongue and Groove
Floor Material12mm Tongue and Groove
Roof TypeApex Roof
Door StyleDouble Door
Building TypeWorkshops
Width 10' 0" 3.05m
Depth 19' 8" 5.99m
Eaves Height 5' 9" 1.75m
Ridge Height 8' 4" 2.54m
Door Width 3' 6" 1.07m
Door Height 5' 8" 1.73m
Internal Width 9' 6" 2.90m
Internal Depth 19' 4" 5.89m
Building Orientation


This 20 x 10 Waltons Groundsman Tongue and Groove Apex Workshop is perfect if you are an avid DIY-er who needs somewhere to work on projects. Boasting a spacious interior, this garden shed is ideal for storing all your tools and machinery. The walls have been crafted using 12mm tongue and groove cladding; the interlocking nature of this cladding creates a robust wall panel that will keep rain water out. The floor and roof have been made using 12mm tongue and groove cladding, this forms a strong base that is perfect for storing heavy pieces of equipment in. A thick 2” x 1” wooden frame offers support for the walls, floor and roof to attach to; the interior framing makes this building a solid structure that can withstand poor weather conditions.

Double doors fitted to the front make it easy to store and remove large pieces of equipment such as machinery and work benches. ‘Z’ shaped ledging is installed on the rear of the doors for additional support. A rim lock is included as standard to keep your possessions safe when the workshop isn’t in use. Large opening windows let natural light flood the interior, making this wooden workshop a bright and airy space to work in. The windows are made of shatterproof styrene; this is a safer alternative to traditional glass that is ideal if you have a young family or busy allotment. A traditional apex roof provides a lot of extra headroom inside, this is perfect if you want to install standing shelves. Quality mineral felt is included to help protect the roof against wood rot and decay.

01SHPWOR2010DDOW-V1.pdf Click here to view our easy to follow installation instructions

Important Information

Our dip treated buildings, once installed, will need treating as soon as possible and on an annual basis in order to receive the 10 year anti rot guarantee*. The building also includes a 1 year manufacturers guarantee* as standard.

Dip Treated Buildings

  • Our buildings are supplied flat packed as DIY kits with full instructions.
  • It is the customer's responsibility to follow the instructions outlined in Aftercare.
  • All of our buildings are delivered unpainted. The buildings are dressed for display, we don't supply any accessories or shelves featured within the product images.
  • Our factory applied Dip Treatment may differ in shade between components as it is simply a basecoat.
  • Exact product dimensions are supplied on the listing as we do round off the main size of the building in order to make it easier for customers to find, so please be sure to check the item's specific measurements carefully.
  • All measurements refer to the exterior of the building which includes the roof overhang unless stated otherwise.
  • Our styrene windows are protected using a clear film which will need to be removed after you've installed the building.
  • We 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.
  • Delivery times highlighted with an asterisk (*) refer to working days.

10 Year Anti-Rot Guarantee

Our Dip Treated Garden Buildings come with a 10 year anti rot guarantee. Anti-rot protection guards against fungal decay. The guarantee does not cover movement, twisting, warping or splitting of timber products over time.

During manufacture we apply a water based treatment which protects against fungal and insect attack. This treatment lasts approximately 3 months and will require a preservative top coat application as soon after construction as possible.

In order to keep your building in tip top shape and maintain the 10 year anti rot guarantee, it will need re-treating at least annually. Only high quality timber preservatives should be used and applied in accordance with the manufacturer's instructions. This must be done at least annually to preserve the 10 year anti rot guarantee. For more information please refer to the Waltons T&C's.

1 Year Manufacturer's Guarantee

Subject to the conditions set out in the T&C's (Section 8) the Seller warrants that the Goods will correspond with their specification at the time of delivery and will be free from defects in material and workmanship for a period of 12 months.


We want you to enjoy the use of your new garden building for many years. To give you the best chance of doing so, your product needs protecting at the start and maintained during its life. If you're planning a DIY project, please read our Self-Installation & How to Build a Shed advice pages before you start.


All long-lasting garden buildings will have been built on a solid and level base, either concrete, slabs, a wooden frame or ground level bearers. A flat, level base is essential, for more information go to our How to Build a Shed Base guide.

If your garden building is not level and square when built, it will twist and warp with the natural movement of the wood. The first signs of this are when the doors or windows stop opening and closing properly. You may get issues with the roof and potential gaps in the panels which will allow water in, there may be flex in the floor and probably creaking. Check your base is level in both directions and adjust prior to the build. It will be really difficult to adjust afterwards.


Our styrene windows are protected using a clear film which will need to be removed after you've installed the building.

All Waltons shed windows are designed to fit well, but over time and with the movement of wood, small gaps can appear. Help to prevent this by sealing your windows with a silicone sealant. You can do this either when you build your shed, or add it to an existing one. We've created this video Protect Your Shed - Silicone Window Sealant for guidance.

We've also created these handy Maintenance Guides to help you make the most out of your building, for years to come. Should you require any further advice, you can contact our Customer Service Team on 0800 029 1000 and select Option 3.

Delivery Information

Delivery on this building is 2-5 working days to most UK Mainland addresses.

You can book the day of your choice for delivery when placing your order, alternatively you may place your order without selecting a delivery date and one of our team will contact you directly to arrange a suitable delivery date.

Due to the nature of our products we are unable to deliver to Ireland, some areas of Scotland and any offshore islands. If you are unsure then please use the postcode to see if we are able to deliver to your area.

Important - Delivery is kerb side only, though at the drivers discretion they may be able to help you lift the building to a more suitable location outside your property. If you need to transport the building through your house then you will need to make your own arrangements prior to delivery to do this as our drivers are not insured to enter your house.

The Customer or Friend/Neighbour will need to be present to sign for the delivery. We cannot leave the item without a signature.

Our driver will call you when they are approximately 30 minutes away from your location.


We offer a 30 day money back guarantee on all of our items. The guarantee commences from the date which you receive your item and we 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.

As the buildings are sold as DIY kits, we cannot dismantle on your behalf and we cannot be held liable for any third party costs. Once the building has been received by our factory, a full refund will be issued within 1-3 working days.


Free Delivery

This garden building comes with FREE delivery to most UK postcodes. For more information check here.

Roofing Felt

This garden building comes with free roofing felt.

12mm Tongue & Groove Cladding

This building is clad using 12mm thick interlocking tongue and groove board to prevent weather damage and provide maximum strength.

Double Framed Corners

This garden building features double framed corners for added strength and stability.

Round Edge Framing

Our internal framing is planed and rounded to avoid splinters to hands and also makes it more resistant to moisture

Floor Joists

This garden building uses planed timber in the floor joists to provide a sturdy support on your base.

10 Year Anti Rot Guarantee

This Product carries the 10 year Anti Rot guarantee as long as the garden building is well maintained.

Styrene Glazing

This garden building comes with styrene glazed windows.

12mm Tongue and Groove Roof & Floor

The traditional looking finish to a roof and floor which is strong and durable.

Ledged and Braced Door/s

This garden building comes with fully ledged and braced doors adding security and helping to extend their durability.

Rim Lock

This Rim Lock makes this shed very secure. The lock is featured in the door handle and is supplied with a key.

Window Panel Placement

The window panel can be located on either the left or the right handside of the building

Manufactured in Britain

This Product was manufactured in the UK. By purchasing this product you are supporting British manufacturing.


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Unlike many companies, we publish all of our reviews - good or bad - to give you, the customer, total transparency and peace of mind.

Date: 03-Nov-2017
Review:The Product is well made and tye design is very good.
Our Reply:Good afternoon,

We're glad to hear you're happy with your Groundsman Workshop design and quality.

Kind regards,
Stevie - Waltons Team
Date: 12-Oct-2017
Review:Not bad but a few detail improvements would make the product better
Our Reply:Good afternoon,

Thank you for your review and input. As previously mentioned your comments have been taken on board.

Kindest regards

Chris - Walton Teams
Date: 07-Sep-2017
Review:Downside of very good price is new wood, lots of nails - not all regularly positioned, lots of daylight between sections after erecting on concrete base( now all silicone filled), sparse (barely adequate) asphalt supplied, additional roll purchased & fitted over top, extra strength flooring support deemed...
Our Reply:Good afternoon,

Thank you for taking my call earlier and apologies again for the issues you have experienced. I have emailed as agreed and should there be anything further we can assist with, please contact us on either 0800 029 1000 or Thank you again for your...
Date: 21-Jul-2017
Review:Exactly as expected from brochure.
Our Reply:Good morning,

It is wonderful that your tongue and groove shed met your expectations and that you are happy with the quality. Thank you again very much for your great review!

Kindest regards,
Kirstie - Waltons Team
Date: 25-Jun-2017
Review:The construction of the shed required a little more than just basic DIY skills however, with a little patience the end result was as advertised.
Our Reply:Good morning,
Thank you very much for your feedback and it's great to hear that you are happy with your new Groundsman building,
Kindest regards
Mike - Waltons Team
Date: 07-Mar-2017
Review:Whilst I'm tempted to give one star I have to grudgingly admit there are redeeming features. The screws, nails etc were all poured into one bag so it took some considerable time, ongoing through the job, to separate them out. This is a big building and a lot of bits. In truth I gave up after a while and...
Our Reply:Good afternoon, 
Thank you for providing us with your valuable and feedback. We take our customers comments very seriously as we continually strive to improve our products. I would like the opportunity to discuss this with you and have tried calling earlier. I left a voice message which I hope you...
Date: 23-Dec-2016
Review:Brilliant service couldnt be better,
Our Reply:It is wonderful to know you are pleased with your tongue and groove workshop. Thank you for your great review!

Kindest regards,
Kirstie - Waltons Team
Date: 30-Oct-2016
Review:Great product well put together fantastic value for money highly recommended
Our Reply:I am thrilled that you are so pleased with your new tongue and groove workshop and that you feel it is fantastic value for money and you would recommend Waltons.
Kindest regards
Kirstie - Waltons Team
Date: 19-Aug-2016
Review:Poor machinig on a number of elements of this product. Timber used has a myriad of knotholes which are not filled, consequently daylight can be see through a number of the panels. Not a quality product. Windows do not fit, again daylight visible through the openings.
Our Reply:I am sorry to hear that you are not completely happy with your purchase and I would like to thank you again for taking the time to speak with me this afternoon. As soon as we are in receipt of your images we will contact you and discuss how best to proceed. Thank you again.
Date: 05-Aug-2016
Review:The shed is not solid quality, doubt if it will survive a serious wind. Very poor and weak, shoddy construction with less than good materials, low quality wood, the plastic windows are a joke, no sealing, will leak in a rain storm, flap in the wind . The erection instructions are very poor, they need far...
Our Reply:The specifications of all buildings are clear on the website, but we do value all feedback regarding our products. If you have any concerns regarding the quality of any specific parts, please contact us on 01636 880514.
Kind regards,
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