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Thermowood Wooden Greenhouse 218 - Built In Shed

Thermowood Wooden Greenhouse 218 - Built In Shed
Pictures 1 and 2 show the 8'9"x16'9" greenhouse (10'5" greenhouse with a 6'4" shed) with optional high level shelf in the greenhouse, guttering, shed window and a colour painted finish. Picture 3 shows a pressure treated 8'9"x23'0" greenhouse (16'8" greenhouse with a 6'4" shed). Picture 4 shows the thermally modified finish that is now supplied as standard. Picture 5 shows the standard shed shelving. Picture 6 shows the optional paint colours available. All pictures show greenhouses with the 410mm high timber panelling.


These excellent quality greenhouses are 8'9" wide. The lengths are 12'7", 14'8", 16'9", 18'11", 21', 23', 25'1" or 27'2". Features include a 6'4" long storage shed to the rear with a durable vinyl roof cover and two free shelves. The greenhouse timber panelling is available in two different heights. All timber has been thermally modified, a lifetime preservative treatment. Other quality features include toughened safety glass, double doors in the greenhouse and a single door in the shed. A full length staging is included free to one side of the greenhouse and all roof vents include free automatic openers. The eaves height is a generous 5'8" and the door height is 6'6". Options include additional staging, guttering, shed windows and a coloured paint finish. Pressure treated finish is no longer available.

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  • Free same day installation
  • Integral storage shed to the rear 8'9"x6'4" (2660mm x 1920mm)
  • Free full length timber slatted staging to one side of the greenhouse, 1'8" wide x 2'5" high (520mm x 745mm)
  • Free full length low level workbench to one side of the shed, 1'8" wide (520mm)
  • Free full length high level shelf to one side of the shed, 10" wide (250mm)
  • All timber used in the construction of this greenhouse originates from sustainable forests
  • Heavy duty timber frame (finished size 58mm x 32mm after machining)
  • Thermally modified timber throughout (lifetime preservative treatment)
  • Full height glass where practical with no unsightly glass overlaps
  • Modern glazing system with grooved framing and no separate glazing beads
  • Toughened safety glass
  • 2 free roof vents complete with automatic openers (12'7" and 14'8" long greenhouses)
  • 4 free roof vents complete with automatic openers (16'9", 18'11", 21'0" and 23'0" long greenhouses)
  • 6 free roof vents complete with automatic openers (25'1" long greenhouses)
  • 8 free roof vents complete with automatic openers (27'2" long greenhouses)
  • Half boarded double hinged inward opening doors to the greenhouse
  • Fully boarded single hinged outward opening door to the shed
  • Joinery doors with morticed and tenoned joints throughout
  • Greenhouse door includes aluminium door handle with mortice lock
  • Shed door includes fitted padbolt
  • Low threshold doorways for easy access
  • Vinyl shed roof covering
  • Thermally modified timber boarded shed floor, unpainted
  • Greenhouse double door height 6'6" (1980mm)
  • Greenhouse double door width 3'11" (1200mm)
  • Eaves height 5'8" (1730mm)
  • Ridge height 7'9" (2370mm)

FREE SAME DAY INSTALLATION - THE BENEFITS: Our free in house installation service is not just convenient, it is also your assurance of a better quality greenhouse. This is because any building which includes free installation is invariably better made using quality components. Over time regular feedback from fitters ensures that design faults and weaknesses have been rectified. Same day installation is convenient for you and cost effective because it saves travelling costs. The fitters will deliver your greenhouse and then install it, all at the same time. Others send sub-contract fitters separately, often from far away and often a week or two after the delivery. Waiting for the fitter can be very frustrating. Sub-contract fitting is also much more expensive because of the travelling costs. The fitting service does not include base preparation. A flat and level base is required, which can be made using concrete, paving slabs, pressure treated timber or plastic. In many areas we offer a base laying service as an option. We also offer heavy duty plastic base kits in all areas.

THERMALLY MODIFIED TIMBER: Thermally modified timber is a beautiful natural material with a projected service life of 30 years or longer. Only heat and steam are used in the treatment process and no chemicals are added. It is a lifetime preservative treatment. The timber is gradually heated to a high temperature which permanently changes the physical properties of the wood. The resistance to decay and stability of the wood are significantly improved as are the insulation properties. The moisture content is reduced and resin is removed so it cannot seep out of the wood. The process was developed in Finland but it is based on ancient knowledge. For example, the Vikings knew that fencing poles with a burnt surface were more durable. The finished colour of the wood is an attractive brown which can be painted or stained just like any other wood. If the wood is left untreated it will fade over time to a silver grey colour in the same way as other timber.

TOUGHENED GLASS: Toughened glass is the best glazing material for use in greenhouses. It is around 6 times stronger than normal glass so it is less likely to break and when it does break toughened glass breaks into harmless small pieces. This makes toughened glass the best option for all the family including children, pets and the elderly. Toughened glass also strengthens the frame and it is heavy which helps to resist wind. Full height toughened glass is supplied in larger sizes than horticultural glass with no overlapping glass.

GREENHOUSE LOCATION: Ideally your greenhouse should have a clear space at least 18" wide on all sides, if possible. This ensures easy access for both installation and future maintenance. In reality this is often not practical and at many sites it is not needed. A reduced clearance is often possible on one or two sides. You should cut back or remove any nearby shrubs and trees. Remember to allow for future growth. Ideally the ridge of a greenhouse should run from east to west. The best position for a freestanding greenhouse is a sunny spot outside the shadow of nearby buildings and trees. A sheltered position is best otherwise additional screening may be advisable. Plants need plenty of water so your greenhouse should be close to a water supply and the site should be well drained.

SIZES - LENGTH AND WIDTH: The sizes are listed alongside the price. The first dimension listed is the width and the second dimension is the length. The width refers to the angled gable walls at the front and rear including the door wall. The length refers to the side walls. The sizes listed are the external wall sizes. These sizes do not include the roof overhang. Many other suppliers quote the overall roof size which is much larger.

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