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Swallow Mallard 8 x 20 ft ThermoWood Greenhouse

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Mallard ThermoWood Greenhouse
Swallow Mallard 8 x 20 ft ThermoWood Greenhouse
Mallard Copper Valley
Mallard Roof Vent
Mallard Returned Staging and High Shelf
Swallow Mallard 8 x 20 ft ThermoWood Greenhouse
Mallard ThermoWood Greenhouse
Swallow Mallard 8 x 20 ft ThermoWood Greenhouse
Mallard Copper Valley
Mallard Roof Vent
Mallard Returned Staging and High Shelf
Swallow Mallard 8 x 20 ft ThermoWood Greenhouse
Description

The T-shaped 8ft x 20ft Mallard greenhouse will make a magnificent addition to your garden. It's classically styled and built to last with highly durable Thermowood®.

Thermowood is Scandinavian timber which has been heat treated to remove moisture, it has minimal expansion and shrinkage, and therefore is highly unlikely to warp. The wood is also rot-resistant and doesn't need to be treated with preservatives, making it ideal for long term use outdoors.

Four opening vents create a lovely flow of air that your plants will certainly appreciate, and 3mm toughened real glass glazing lets in masses of light. Inside you'll find two front returned stagings as standard, although more for the rear can be added, as well as shelving throughout.

The greenhouse that's illustrated is sited on a dwarf wall however as standard the building is constructed on a boarded base. Both are very attractive and are designed to support your garden preferences.

Read up on our guide for the benefits of Thermwood® greenhouses.

8x20 Mallard Features:

  • Available with Boarded Base or Dwarf Wall-Ready
  • Crafted from Heat-Treated (Thermowood) Scandinavian Red Wood Pine
  • Rot, Warp & Shrink Resistant Properties
  • Real 3mm Toughened Glazing Panes
  • Single Door Entry with Mortice Lock
  • Ridge & Top Vent Capping Seals
  • Stainless Steel Nails & Silicone Sealant
  • Includes: 6 Roof Vents
  • Includes: 6 Automatic Roof Openers
  • Includes Left & Right Front Stanging
  • Includes: Damp Proof PVC Floor Membrane
  • Includes Delivery & Installation

8x20 Mallard Dimensions:

  • External Height To Ridge: 266cm (8ft 9ins)
  • External Height To Eaves: 173cm (5ft 8ins)
  • Greenhouse Width: 609cm (19ft 11ins)
  • Greenhouse Depth: 266cm (8ft 9ins)
  • Porch Width: 204cm (6ft 8ins)
  • Porch Depth: 74cm (2ft 5ins)
  • Door Opening Height: 198cm (6ft 6ins)
  • Door Opening Width: 57cm (1ft 10ins)
  • Glazing Bars: 58mm x 34mm
  • Board Thickness: 12mm

Please Note: Imagery may show this model greenhouse in a different size and with optional extras that must be purchased separately. A suitable flat, level and sturdy base must be prepared before the delivery and Installation date to ensure a hassle-free installation.

Select Your Options

Design: Standard or Dwarf Wall

as Wooden Board Base Design

as Wooden Board Base Design

as Dwarf Wall-Ready Design

as Dwarf Wall-Ready Design

Design: Greenhouse Colour

with Standard ThermoWood® Finish

with Standard ThermoWood® Finish


Your Greenhouse will have a standard ThermoWood® none painted finish.

This is a standard no cost option.

with Natural Oiled ThermoWood® Finish

with Natural Oiled ThermoWood® Finish


With a ThermoWood® Oiled Finish to prevent fading, water marks, mould, water ingress and dirt marks.
with ThermoWood® Finish in EARTH

with ThermoWood® Finish in EARTH


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in LILY WHITE

with ThermoWood® Finish in LILY WHITE


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in BRACKEN

with ThermoWood® Finish in BRACKEN


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in OLIVE

with ThermoWood® Finish in OLIVE


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in CLOUD GREY

with ThermoWood® Finish in CLOUD GREY


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in OXFORD STONE

with ThermoWood® Finish in OXFORD STONE


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in ROBINS EGG BLUE

with ThermoWood® Finish in ROBINS EGG BLUE


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in SLATE

with ThermoWood® Finish in SLATE


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.
with ThermoWood® Finish in SUMMER GREEN

with ThermoWood® Finish in SUMMER GREEN


With a ThermoWood® Paint Finish using an opaque acrylic protective top coat which has resistance against bacteria, mould and UV rays.

Design: Appearance Additions

with Ornate Black Door Handle

with Ornate Black Door Handle

Instead of the standard silver effect door handle, upgrade to a more traditional colour and style with this ornate black handle.
with Black Metal Greenhouse Cresting

with Black Metal Greenhouse Cresting

A full set of black metal cresting for the roof of your greenhouse.

Accessories: Extra Rear Staging

with Rear ThermoWood® Staging

with Rear ThermoWood® Staging


Additional staging for the rear of your Greenhouse in a standard ThermoWood® (unpainted) finish.
with Rear ThermoWood® Staging Oiled

with Rear ThermoWood® Staging Oiled


Additional staging for the rear of your Greenhouse with an Oiled ThermoWood® finish.

Accessories: High Level Shelf

with Rear ThermoWood High Shelf

with Rear ThermoWood High Shelf

Add a high-level shelf to the rear of your greenhouse. Supplied in a standard ThermoWood none painted finish.
with Rear ThermoWood High Shelf Oiled

with Rear ThermoWood High Shelf Oiled

Add a high-level shelf to the rear of your greenhouse. Supplied in an oiled ThermoWood finish.
with Front Returned ThermoWood High Shelving

with Front Returned ThermoWood High Shelving

Add a set of high-level shelving to the front of your greenhouse, following the L-shaped pattern of the greenhouses' design. Supplied in a standard ThermoWood none painted finish.
with Front Returned ThermoWood High Shelving Oiled

with Front Returned ThermoWood High Shelving Oiled

Add a set of high-level shelving to the front of your greenhouse, following the L-shaped pattern of the greenhouses' design. Supplied in an oiled ThermoWood finish.

Design: Porch Extension

with Porch Extension to 4ft 5ins (Thermowood)

with Porch Extension to 4ft 5ins (Thermowood)

Extends the porch depth from 2ft 5ins to 4ft 5ins in standard Thermowood.
with Porch Depth Extension to 4ft 5ins (Oiled Thermowood)

with Porch Depth Extension to 4ft 5ins (Oiled Thermowood)

Extends the porch depth from 2ft 5ins to 4ft 5ins in oiled Thermowood.
with Porch Depth Extension to 4ft 5ins (Painted)

with Porch Depth Extension to 4ft 5ins (Painted)

Extends the porch depth from 2ft 5ins to 4ft 5ins in painted Thermowood, matched to your chosen paint colour for the main greenhouse frame as per your selection above.
with Porch Depth Extension to 6ft 6ins (Thermowood)

with Porch Depth Extension to 6ft 6ins (Thermowood)

Extends the porch depth from 2ft 5ins to 6ft 6ins in standard Thermowood.
with Porch Depth Extension to 6ft 6ins (Oiled Thermowood)

with Porch Depth Extension to 6ft 6ins (Oiled Thermowood)

Extends the porch depth from 2ft 5ins to 6ft 6ins in oiled Thermowood.
with Porch Depth Extension to 6ft 6ins (Painted)

with Porch Depth Extension to 6ft 6ins (Painted)

Extends the porch depth from 2ft 5ins to 6ft 6ins in painted Thermowood, matched to your chosen paint colour for the main greenhouse frame as per your selection above.

Design: Porch Extension Shelving

with High Shelf for 4ft 5ins Porch Extension

with High Shelf for 4ft 5ins Porch Extension Oiled

with High Shelf for 6ft 6ins Porch Extension

with High Shelf for 6ft 6ins Porch Extension Oiled

Accessories: Rainwater System

with Swallow Hunter Rainwater System in WHITE

with Swallow Hunter Rainwater System in WHITE


Adds a Rainwater System to your Greenhouse which consists of a Gutter and Downpipe in the required size.
with Swallow Hunter Rainwater System in BLACK

with Swallow Hunter Rainwater System in BLACK


Adds a Rainwater System to your Greenhouse which consists of a Gutter and Downpipe in the required size.

Delivery Service

including Delivery/Installation within Mainland UK

including Delivery/Installation within Mainland UK


Delivery and Installation within the Mainland UK is included with your Greenhouse. A flat and level base must be ready prior to delivery. Exceptions: Scotland North of Grangemouth.
including Delivery/Installation within Scotland (North of Grangemouth)

including Delivery/Installation within Scotland (North of Grangemouth)


Delivery and Installation within Scotland North of Grangemouth. A flat and level base must be ready prior to delivery.

Your Selected Options:

  • as Wooden Board Base Design
  • with Standard ThermoWood® Finish
  • with Swallow Hunter Rainwater System in WHITE
  • including Delivery/Installation within Mainland UK

£5,892.00 inc. VAT

Delivery Information

Important Covid-19 Update - Monday 18th May 2020

Delivery timeframes have been extended to up to a 12-week delivery and installation time frame due to carrier restrictions during Covid-19 and excessive demand.

Fast Free Delivery within Mainland England and Wales.
Inclusive delivery and installation is limited to UK Mainland excluding areas 15 miles further North of Glasgow. Areas further than this and Offshore Islands would require a custom quote. Please Contact Us here if this is the case.
A suitable, flat and level base must be prepared prior to the delivery and installation.

Delivery Period
Delivery will typically be made within 4 - 6 weeks due to this product being handmade. working days but may be extended during busy times of the year.

Bespoke Product Procedure
This product range is made to order on an order-by-order basis, therefore is exempt from our usual cancellation and returns policy. Any cancellations after your order has started production may not be able to be cancelled or may be subject to cancellation charges. Although a very rare occurrence, this does not affect any orders that arrive damaged or faulty, whereby our normal terms on receiving a faulty product will apply. 

Vehicles We Use
Items will be delivered on larger lorries which can get to most places it's typically, a 7.5 ton lorry which is about the size of a dustbin lorry, this will depend on the item that is being delivered and should you have any concerns with restricted access to your property we ask you to contact us prior to placing an order.

Unloading Of Your Delivery
Due to the nature of this product, delivery will be made to the front of the property to the nearest location. Our drivers will not carry these items inside your home or back garden. When the item is delivered on a pallet, the pallet and packaging are non-returnableGoods can only be manoeuvred on a flat and level surface (i.e. not a gravel driveway) by a pallet truck. On some occasions the driver will split the package to assist with manoeuvring of the item. Once you are happy, we will ask you to check the condition of the goods and sign for the delivery.

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