Mercia Apex Greenhouse/Shed Combi - 12 x 6ft

Mercia Apex Greenhouse/Shed Combi - 12 x 6ft

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Mercia Apex Greenhouse/Shed Combi - 12 x 6ft is rated 2.4 out of 5 by 10.
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  • Overview
  • Reviews (10)
  • Delivery
  • Returns

Those looking for a greenhouse that also offers a great place to store gardening equipment will love this range of Shiplap Combi Greenhouses.

These garden buildings offer the best of both worlds, a greenhouse for growing a wide range of home grown produce and a spacious shed that can be used to house tools and various pots. The walls are created using 12mm shiplap cladding, each slat interlocks with each other to create a weatherproof seal, each panel is supported by thick 1” x 1” timber framing for additional support during gusty weather.

The floor and roof are cut from 9mm solid sheet board, a durable material that can withstand daily use and storage. An apex roofline means there is plenty of headroom inside, ideal for those that want to install standing shelves.

These buildings are supplied with roofing felt to protect against weather damage and a pad bolt is included for extra security. Two turn buttons are included to keep the large single door closed when not in use. An opening roof vent features in the roofline so that the consumer can regulate the internal temperate.

The shatterproof styrene glazing allows natural light to flood the interior, creating a bright environment that encourages plant growth.

Features and Benefits

  • Durable – This sturdy and strong garden building is constructed from robust timber and joints giving you a long-lasting and resilient structure.
  • Decorate yourself – Paint, stain or leave it natural, this greenhouse combi shed gives you the chance to customise it to how your kids want it.
  • Self-assembly – This is a two-person job but can be completed without any professional help needed. All assembly instructions are included.


  • 12mm Interlocking Cladding
  • Styrene Glazed Windows
  • Opening Window in Roofline
  • Single Door
  • Storage Shed


12x6 - Traditional Apex Greenhouse Combi Shed



Base Width




Base Depth


Ridge Height


Eave Height


Internal Width


Internal Depth


Internal Ridge Height


Internal Eave Height



12mm Shiplap

Floor & Roof

Solid Sheet Material (OSB)

Door opening width


Door opening height


Lock type

Turn Button


Water Based Dip Treatment


10 Year Anti Rot - Requires annual treatment with a high-quality preservative that weatherproofs and protects against rot

View Swift Foundations range of shed bases and roofing kits HERE

Reviews (10)
Rated 3 out of 5 by from Inadequate directions Bought knowing we needed to add additional stability to the greenhouse, however the basic instructions are missing key points and you need common sense to work out what the additional pieces left over add for!
Date published: 2021-03-05
Rated 3 out of 5 by from A greenhouse/combi _12x6 ft. Purchased from you in early Feb ,still waiting to assemble when the weather warns up.the media company delivered a day late and was rough handled when unloaded from lorry? Until assembling time I cannot comment further.a good deal on price.
Date published: 2021-03-02
Rated 2 out of 5 by from Snagging I’m unable to open the hinge. Please could you replace the hinge that doesn’t open ( see attached photo) I am very disappointed in the finish of the wood, there were two slates broken in half where there was a knot. There were others that had bits missing where there was a knot. Why did I have to pay for the back of the greenhouse, which I don’t need as I ordered a shed, greenhouse combo?
Date published: 2021-03-01
Rated 1 out of 5 by from Poor Pre fabrication This prefabricated pack was not made to a high standard , poor nailing , sizes not matching. This took up huge amounts of my time to rectify the problems I came across.
Date published: 2020-12-16
Rated 5 out of 5 by from Brilliant shed but watch the instructions Arrived on time, all parts provided, erected within a day, looks stunning but beware: The instructions have three elephant traps that can see your beautiful shed and greenhouse become a bit of a nightmare: 1) if combining shed and greenhouse you only need fit 3 of the 4 end panels provided; fit all four and you send the length measurements out plus block/double door the entrance to the potting shed section 2) if you dont then check the measurement/length of each piece against the instructions then you discover, the hard way, that the pieces provided are between 80 and 100mm longer than needed - the instructions read 920mm for the upright sections, the parts provided are cut to 1000mm for example; cut the pieces to the lengths in the instructions and it looks wonderful, the glass fits, the roof joist also fits and it stands upright and rigid. But use the pieces provided in the length provided and your roof joist can be as much as 8 inches short, half your glass does not fit, and the whole thing sags then falls over; 3) trap three, is aesthetic. The shed section is a different colour and grain than the greenhouse. If this worries you then soon sorted and basically paint/stain the whole thing to a matching colour; we went for grey but could be any of racing green, light green, royal blue, cornflour blue, yellow etc but key is that it will suddenly bind what is two buildings built with different structures into a single building We are amazingly happy and more than satisfied with this greenhouse but do advise reading the instructions several times and then checking the measurements between the parts provided and the instructions. Time taken at the start will save a day of frustration
Date published: 2020-07-30
Rated 1 out of 5 by from Absolute waste of money The quality of this product leaves a lot to be desired. Most timbers out of shape and very poorly put together with misaligned nails out of shape frames and very poor quality timber. The floor needs to be strengthened . Had to take out all the miss aligned nails and glue and screw. Nothing fits as it should as most panels are not the correct lengths and the roof no matter how you try just will not fit, gaps and overhangs and the roof panels are longer than they should be. Over all very very disappointed with a structure We can’t use and can’t return as no one answers the phone or calls back.
Date published: 2020-06-24
Rated 1 out of 5 by from Absolute Rubbish We loved the concept of this greenhouse/combo it was just what we wanted. We saw a few poor reviews but hoped it would be ok. How wrong we were - the shed instructions were clearer than the greenhouse but basically it was a jumble of pieces of wood and a guessing game to match them up to the instructions. We had split pieces, missing pieces (not easy identify by matching to the component list) and we’ve had to make various repairs as we went along. It was exactly what one review said - ok if you’re a competent DIYer. The actual quality is rubbish, we’ve carried on because we brought ours with a price reduction & we’d already painted it because realising the wood split where there were knots etc. The inside of the door frame is particularly messy to look at where various pieces connect and would have been improved by widening the door and adding a cover trim. I have to say we expected more from Robert Dyas And we won’t be shopping with you again,
Date published: 2020-06-13
Rated 1 out of 5 by from Terrible product This combi is just NOT a combi, it is two different buildings. A greenhouse and a separate shed. The instructions are for two different buildings also and it does definitely not go together. It looks awful and you can tell they don't go together. The wood is cheap, warped and full of knots. We have missing parts and parts that don't belong to either shed or greenhouse.We had so much trouble trying to put it up and had to use some of our own wood to make it stay together. Luckily my husband is a builder.This is the worst thing I have ever purchased and it is totally NOT worth the money.
Date published: 2020-05-19
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  • clientName_robertdyas
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Vendor Direct Products:

This product is delivered for FREE by our approved supplier on a Standard Delivery Service.

Please be aware that we currently cannot arrange for delivery of this product to the following postcodes: AB, FK, HS, IV, KA, KW, PA, PH, ZE, LL58-LL78, IM, TR, BT, PO30-41.



In the UK you have a legal right, under the Consumer Contracts Regulations June 2014, to cancel your order within fourteen (14) days following your receipt of the goods. Refunds for orders cancelled under the provisions of the Consumer Contracts Regulations will be processed in accordance with your legal rights.

You may not cancel orders for the following types of products:

  • Electrical/Technical products which have been unsealed
  • Customised or bespoke Products
  • Anything of a nature that for hygiene or associated health and safety - this includes the Outdoor Spas, Mattresses and Divan Sets
  • Fresh food

Under the Consumer Contracts Regulations June 2014 you have a duty to take reasonable care of Products whilst they are in your possession. You will receive a full refund of the purchase price of the Products.

This is not intended to be a full statement of your rights under the Consumer Contracts Regulations. Full details of your rights are available from your Local Authority’s Trading Standards Office.

How To Return A Product

If you wish to return your item to Robert Dyas, you can do so by the following method:

1. Request a Collection via Robert Dyas Customer Services

Contact our Customer Services team on 0333 103 6677 (Monday- Friday 08:00 - 17:00, Saturday 09:00 - 17:00, Sunday 09:00 - 17:00 - call charges may vary by network) or via email to: [email protected] who will be able to arrange a collection for your item with the supplier. Please ensure that you provide your order number when contacting customer services.

If you are returning the item under your 14 day right to cancel, then a collection charge will be applied:

  • Products < 20kg: £7.50
  • Products > 20kg: £30

If you are not at home when we try to collect we reserve the right to deduct from your refund or charge your credit card the direct costs to us of the failed return in accordance with the Consumer Protection (Distance Selling) Regulations 2000.