The detail of our Greenhouses

All of our cedar greenhouses are individually handmade by our craftsmen to give that unique quality and appearance. We employ traditional methods using mortice and tenon joints and only the highest quality Western Red Cedar (Thuja plicata). We can accommodate any size or unusually shaped greenhouse, existing dwarf walls or buildings needing a new dwarf wall- bespoke items are our challenge! Being a family run business it gives us the opportunity for our team of craftsmen not only to make your building, but also to install and erect it.

Materials used within our buildings

  • Western Red Cedar
  • Barrettine Premier Wood Preserver
  • Bayliss Autovents MK7
  • Stainless Steel Fixings
  • Half round 112mm Rainwater System
  • 4mm Toughened Safety Glass
  • Stainless steel Door Hardware
  • Silicone Sealant

Celebrating 30 Years- 10% Discount

free coldframe offer

Free Side of 22” Tanalised Staging

Free Stainless Steel Door Hardware Upgrade

Free Installation And Delivery To Mainland UK

Free Louvres or Casement Windows

Limited June, July and August delivery dates left

Our Best Greenhouse Offer Ends 12th July

free coldframe offer

Offer Extends to Maintenance Free Roof, Louvres, Casements and More

Offer now includes shed variations

Woodpecker greenhouses at Hamptyon Court Flower Show 2023 Woodpecker greenhouses at Hampton Court Flower Show 2023

Product Details

Western Red Cedar (Grade 2 Clear & Better)

Why Choose Western Red Cedar (Thuja plicata)?

Beauty: Found in Canada’s Pacific Northwest, the timber is renowned for its natural and outstanding physical properties. With a uniform of fine grained texture combined with a palette of warm, mellow tones ranging from light amber to deep honey brown. Its rich colour is beautifully complemented by a natural satin luster and a unique fragrance of a subtle aroma.

Durability: Western Red Cedar produces natural oils that act as preservatives to protect the wood from insect attacks and decay. Its ability to produce such preservatives increase with age – allowing the wood to withstand years of usage. In addition, it is a very stable wood that lies flat and stays straight. Compared to other woods, it boasts a very low shrinkage value, which makes it ideal for use in high-moisture areas.

Practicality: Beauty aside, the Western Red Cedar’s practicality and cellular structure creates interior air spaces that give it an insulation value higher than most woods. Buildings which feature cedar panelling and siding tend to stay warmer in the winter.

Please Note: All of the timber used by Woodpecker Joinery is supplied by Members of The Timber Federation, who recognise the responsibility and importance to protect the forests for future generations.

All our timber has a 10 year guarantee (timbers must be kept clean and clear soil and garden rubbish etc.) We recommend re-staining with Barrettine Premier Wood Preserver every 3 to 4 years to prolong the life. If you require a natural finish, we still stain the greenhouse with a clear preservative. It gives a totally clear finish; you wouldn’t necessarily know that the greenhouse has been treated just by looking at it. Over time the wood will turn a silvery grey in colour; this is the nature of the timber and cannot be prevented. The Western Red Cedar used in our range of greenhouses is air dried as it is being used externally. Greenhouses that have a hand-painted finish are manufactured from kiln dried timber.

The interior of our heritage greenhouse range

4mm Toughened Safety Glass

All our greenhouses and coldframes are manufactured using 4mm English toughened safety glass which meets British Standard 6206 Class A as standard. In some cases where required, we upgrade to 6mm glass.

If a piece of glass was to break, send a photograph of the broken pane and contact us on +44 (0) 1889 562610 to get exact glass sizes. We carry a large stock of standard greenhouses glazing and can offer replacement pieces as part of our after-sales service

Barrettine Premier Wood Preserver

Our greenhouses, and coldframes are pre-treated with Premier Wood Preserver by Barrettine which provides the following properties:

  • The special formulation of Barrettine allows deep penetration of the fungicide into the wood
  • Protects against rot, decay and unsightly mould growth
  • Contains water repellent waxes
  • Harmless to plants when dry

We recommend re-staining every 3-4 years to protect the timber for longer. When re-staining we recommend hand protection to be used as the wood stain can irritate skin. If your skin comes into contact with the stain, wash immediately with water and soap. Eye protection is also recommended. For more information regarding the recommended protective guidelines refer to the Barrettine Safety Data Sheet –VR2 Coloured Solvent Wood Preserver. If you need to order more Barrettine Premier Wood Preserver we sell 5L cans for £40 delivered – Call +44 (0) 1889 562610 for more information. Barrettine Premier Wood Preserver comes under the hazard classification Xn; R65. N;R51/53. R10, R66. Barrettine Premier Wood Preserver comes under the UK Road Class 3 as it’s a flammable liquid. Care must be taken. Please note the product is Harmful and Dangerous to the environment. For more information regarding the product’s physical, chemical properties and toxicological information, see Barrettine Safety Data Sheet – VR2 Coloured Solvent Wood Preserver.


Choices of Preservative Stain Colours

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Shed combo greenhouse

8ft x 12ft Kings Bromley Shed Combo greenhouse installed as part of the RHS Hampton Court Palace Garden Festival 2021 Cut Flower Feature Garden

Bayliss Autovents MK7

Our greenhouses are fitted with Bayliss Autovents MK7 which carry a 2 year guarantee, upheld by Bayliss Autovents. For further product information call – +44 (0) 1335 342981 or refer to – For fitting instructions see attached Fixing & Setting Instructions – Bayliss Autovents MK7. The autovent is designed to open in warm conditions. The wax inside the ’Power Tube’ expands as it warms up, forcing the arm to open the roof vent. It is designed like this to prevent it opening in cold or windy conditions. In high winds it is recommended that the autovent is securely shut by screwing the knurled adjuster tight, as well as keeping all other windows and doors shut. If your autovent stops working, it can be “reset” by putting the cylinder in the fridge for a day. If you are still experiencing problems, contact Bayliss on the above number.

Stainless Steel Fixings

A2 Stainless steel fixings are used throughout, as western red cedar wood has its own natural oils. These oils help to clean and preserve the wood itself but they can also lead to other metal fixings to corrode, so stainless steel fixings are used. The A2 stainless steel fixings adhere to BS EN ISO 3506 Part I and Part II. The A2 Stainless steel screws are part of the Austenitic group and have a tensile strength of 500MPa min. All stainless steel fixings have a 0.1% Carbon content. Sulphur in the fixings may be replaced with selenium. For further information regarding the fixing’s composition please call the Woodpecker office on +44 (0) 1889 562610. For further mechanical properties regarding the stainless steel fixings please call the Woodpecker office on +44 (0) 1889 562610.

Door and Window Furniture

The door furniture is made from stainless steel. We recommend you oil the door and window furniture twice a year with a product like/ similar to WD-40 to prolong the life. This cleans the furniture. All door and window furniture has a minimum 5 year life expectancy as it’s a working part.

Door fitting and Hardware

We give you the choice of fittings from stainless steel (standard) or black antique to high-quality brass and locking systems (at extra cost). Please note that we use only stainless steel screws and fixings on all components, as other fixings are easily corroded by the natural oils in cedar wood.

Silicone Sealant

We use a standard builders’ silicone sealant throughout the greenhouse, this is used to provide a water-resistant lining where two timber sections meet, it’s also used to seal around the rebates before the 4mm toughened safety glass is fixed into place to give a water resistant seal. Standard builders’ Weather Mate is also used to line the western red cedar beading to the glass, to give a water resistant seal. We do not apply sealant underneath or around the bottom framework of the greenhouse. There is a 15mm foam membrane which prevents the greenhouse sitting directly in water; it is not a waterproofing solution.

Half round 112mm Rainwater System Guttering

For additional parts, replacements parts, contact us on +44 (0) 1889 562610. System is covered by BSI Kitemark – no. KM501316. For optimum performance of Half round gutter systems we recommend the use of FloPlast 68mm round downpipe systems. Manufactured in PVC-U, a material that doesn’t ignite easily and doesn’t support combustion. The product materials comply with BS EN 12200 1:2000 (Downpipes and fittings), BS EN 607:2004 (Gutters and fittings) and BS EN 1462:2004 (Eaves brackets). FloPlast systems have been accredited by BSI to BS EN ISO 9001:2008 Certificate Number FM 501414 and BS EN ISO 14001:2004 Certificate Number EMS 538445. All products are subject to quality control procedures and products manufactured to British Standard Specs are marked accordingly. FloPlast have met the Carbon Trust standards in reducing carbon dioxide year on year For technical advice contact FloPlast on +44 (0) 1795 431731 or email FloPlast’s rainwater systems come with a 10 year performance guarantee along with a 10 year colour guarantee.

Basically the choice is yours – just let our team know what you want!

We offer a wide range of accessories for your greenhouse, from our standard range to tailor made staging, seed tray units, manual and auto vent openers and heating systems (see our accessories page).

Basic Guarantee

  • Timber – 10 Year structural (subject to site conditions and care instructions being followed)
  • Barrettine Premier Wood Preserver – 3-4 Years,
  • Bayliss Autovents MK7 – 2 Years (upheld by Bayliss Autovents)
  • Half round 112mm Rainwater System – 10 Year Performance and Colour Guarantee (upheld by FloPlast)
  • 4mm Toughened Safety Glass – No guarantee due to the fragile nature of the material