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11 Aug, 2020 11:38:25

Large Aluminium Orangery 351 - Valley Roof, Box Section

Large Aluminium Orangery 351 - Valley Roof, Box Section


This top of the range, finest quality greenhouse is 12'10"x15'7" including the front projection. The size excluding the front projection is approximately 10'2"x15'7". Features include a decorative valley roof design with a T shape ridge. Luxury features include heavy duty box section aluminium with a powder coated finish in a choice of colours, matching crests and finials and full height toughened safety glass. Other features included as standard are double sliding doors and 3 roof vents with automatic openers. The eaves height is a generous 6'7". Detailed instructions are supplied for DIY self assembly. We offer fitting as a low cost option in many areas.

Prices fixed until Wednesday 12th August.

The prices INCLUDE DELIVERY. Unlike others we do not add delivery charges at the checkout. Everything you need for assembly is supplied including instructions, fixings and glazing. Our local INSTALLATION and BASELAYING services are also available in many postcode areas. The prices include a free base plinth and toughened safety glass.

SizeGreen Finish with CrestsBlack Finish with CrestsAny Other Colour Paint Finish with Crests10mm polycarbonate instead of toughened glass
12'10" x 15'7"


  • Decorative roof design with 2 roof valleys and T shape ridge
  • 4mm toughened glass to BS6206 Class A as standard
  • Substantial aluminium frame
  • Substantial aluminium base plinth included as standard
  • Neat glazing with rubber external capping (no wire clips)
  • Full height glass where practical with no unsightly glass overlaps
  • Double sliding doors
  • Matching crests and finials included as standard
  • Integral gutters with stopends, outlets and full length downpipes
  • 3 free roof vents complete with automatic openers
  • Eaves height 6'7" (2010mm)
  • Ridge height 9'0" (2740mm)
  • Overall depth 12'10" (3920mm)
  • Overall width 15'7" (4760mm)

THIS PREMIUM QUALITY ALUMINIUM GREENHOUSE: These high quality greenhouses are built to a specification which was originally developed fror conservatories and not greenhouses. The heavy duty aluminium frame features box section aluminium glazing bars, corner posts and ridge beam. In addition, the aluminium base plinth features heavy duty box section beams. The prices include 4mm thick toughened safety glass as standard. The glazing is retained neatly with a substantial rubber external gasket. The edges of the glass are completely concealed. The sophisticated glazing system is stronger and neater than other greenhouse glazing systems.

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. All glass supplied is 4mm thick toughened safety glass to BS6206 Class A.

POWDER COATED ALUMINIUM: The powder coated finish is more attractive than the stark silver finish aluminium greenhouses. The tough finish also has excellent weathering properties and retains its gloss and colour superbly. A good example of powder coating is the finish on your washing machine. Powder coated aluminium greenhouses have a similar finish.

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. Polycarbonate glazing is not recommended at exposed sites. Plants need plenty of water so your greenhouse should be close to a water supply and the site should be well drained.

SIZES - DEPTH AND WIDTH: The sizes are listed alongside the price. The first dimension listed is the depth and the second dimension is the width. The depth refers to the overall depth including the front projection. The width refers to the front and rear walls including the door wall. The sizes listed are the external wall sizes.


  • Powder coated aluminium frames in a choice of green, black or any other choice of RAL colour
  • Choice of 4mm thick toughened safety glass or 10mm thick multiwall polycarbonate
  • Heavy duty wooden 2 tier staging with 3"x2" timber framing
  • Heavy duty aluminium staging with 2"x2" framing, a choice of solid aluminium sheet or slatted aluminium worktop and a choice of 30" or 36" working height
  • Staging tray 19" wide, 6" deep, green finish, 10'2" long to suit the sides, 15'0" long to suit the rear
  • High level shelving 4" wide, green finish, 10'2" long to suit the sides, 15'0" long to suit the rear
  • Attractive wooden slatted water butts
  • Propagators
  • Electric and gas heaters
  • Automatic watering systems
  • Insulation
  • Thermometers and soil gauges

MULTIWALL POLYCARBONATE 10mm THICK: 10mm thick multiwall polycarbonate is much stronger and more rigid than the 4mm and 6mm thick twinwall polycarbonate used in cheaper greenhouses. 10mm thick polycarbonate features a honeycomb construction. Multiwall polycarbonate is virtually unbreakable and very practical. With small children or pets around polycarbonate greenhouses are safer. Polycarbonate is also safer to handle during installation. Polycarbonate greenhouses provide a similar growing environment to glass greenhouses with better insulation properties and reduced glare. Polycarbonate also provides good insulation from frost and maintains a more even temperature for better plant growth. Multi wall polycarbonate also diffuses light to prevent scorching.

HEATERS: We offer a huge range of heaters so whatever your specific requirements we have a heater to do the job. Our electric heaters require a standard domestic 13 amp electricity supply. Our propane gas heaters require permanent trickle ventilation when in use. As an approximate guide, a 3kw heater will heat a greenhouse up to 8'x12' or provide frost protection only up to 10'x15' in normal site conditions. A 1.5kw heater will normally heat a greenhouse up to 6'x8' or provide frost protection only up to 6'x12'. Internal partitions are often used in large greenhouses to create a smaller warm room which is cheaper and easier to heat.

HEATING REQUIREMENTS: Heating requirements vary for several reasons. Location is one factor with more heating required in Scotland than in southern England and less heating required in a sheltered position. The design is also a factor. For example, dwarf walls improve the insulation and lean to greenhouses absorb warmth from the existing wall. Another factor is the materials used. Polycarbonate greenhouses retain heat better than glass and wooden greenhouses retain heat better than metal greenhouses. We recommend you to buy a bigger heater than you need - you can always turn it down.


EXTRA COVID-19 CORONAVIRUS INFORMATION: This item is currently available within the estimated delivery times below, with no delays. Our delivery times are slower than normal due to unprecedented demand.

  • Delivery is normally between 10 and 14 weeks after order.
  • Our greenhouse prices include all delivery charges - unlike others we do not add delivery charges during the checkout process.
  • This greenhouse is easy to deliver if access is restricted - all packages are designed to pass through a normal single door.

SPECIALIST DELIVERY SERVICE: These greenhouses are normally delivered by specialist trained staff in dedicated vehicles. The benefits of a specialist delivery service include less damage and helpful drivers who will carry your greenhouse to your chosen storage place. We recommend that glass is stored in a safe place where the driver will stack it neatly for you. The aluminium greenhouse components arrive in one or two long thin boxes.


  • All greenhouse prices include VAT.
  • Pay only 30% deposit when you order this greenhouse by phone or online.

ORDER ONLINE: You can pay with a debit or credit card. We also accept password protected online payments using Verified by VISA or Mastercard SecureCode. You can pay in full or pay a deposit only. You can pay a minimum 30% deposit with order or pay a bigger deposit if you prefer.

METHODS OF PAYMENT: We accept most major credit cards and debit cards including VISA, MasterCard, VISA Delta, VISA Debit, MasterCard Debit, Electron, Solo, Switch, Maestro and UK Maestro. We also accept secure online payments using Verified by VISA or MasterCard SecureCode. We do not accept American Express or Diners Club cards at present.

SCHOOLS, COUNCILS AND BUSINESSES: We supply many schools, local councils and businesses both large and small. The prices and terms are the same so you can order online if you wish. If you want to pay by BACS transfer or company cheque please email us.


  • Low cost installation is available in most areas
  • Low fixed rates
  • Payment on completion

THOUSANDS OF SATISFIED CUSTOMERS: Since we were established in 1981 we have fitted buildings for thousands of customers at unbeatable prices. Our specialist fitters have agreed to fit buildings in your area at low fixed rates in return for regular work. Payment is due on completion. To order online just add your chosen fitting option to your shopping basket before you proceed to the checkout.

LOW PRICES FOR BASELAYING AND INSTALLATION: Our unique low cost installation service is available in most areas. To see the prices in your local area just enter the first half of your postcode at the top of every page or CLICK HERE. If available our installation service is offered alongside the building prices. To see the prices just click on the blue "i" symbol next to each fitter.

NO FITTERS IN YOUR AREA? If you cannot see any fitters in your area please contact us for a quotation. If you experience any other problems, for example entering your postcode or finding the fitting prices just contact us.

FITTERS & BASELAYERS REQUIRED - REGISTER FREE: Give your business a boost - we can put you in touch with customers in your local area! Register now - its free! We need more fitters and base layers in all areas across England, Scotland and Wales. This free service is so simple - it only takes a few minutes to register. Just CLICK HERE to apply online.

Features and Accessories

GREENHOUSES xx - Close up photos
Close up photos
GREENHOUSES xx - High level shelving
High level shelving
GREENHOUSES xx - Roof plans with dimensions
Roof plans with dimensions
GREENHOUSES xx - Staging design options
Staging design options
GREENHOUSES xx - Cross section sketches
Cross section sketches
GREENHOUSES xx - Aluminium staging
Aluminium staging
GREENHOUSES xx - Steel potting benches
Steel potting benches
GREENHOUSES xx - Seed tray frames
Seed tray frames
GREENHOUSES xx - Heavy duty steel 2 tier staging
Heavy duty steel 2 tier staging
GREENHOUSES xx - Toughened safety glass included free
Toughened safety glass included free
GREENHOUSES xx - Greenhouse base preparation and other information
Greenhouse base preparation and other information
GREENHOUSES xx - Heavy duty aluminium 1 tier staging
Heavy duty aluminium 1 tier staging
GREENHOUSES xx - Heavy duty aluminium 2 tier staging
Heavy duty aluminium 2 tier staging
GREENHOUSES xx - Wooden potting tables
Wooden potting tables
GREENHOUSES xx - Heavy duty wooden 2 tier staging
Heavy duty wooden 2 tier staging
GREENHOUSES xx - Irrigation kits
Irrigation kits
GREENHOUSES xx - Insulation
GREENHOUSES xx - Thermometers and soil gauges
Thermometers and soil gauges
GREENHOUSES xx - Electric heaters
Electric heaters
GREENHOUSES xx - Gas heaters
Gas heaters
GREENHOUSES xx - Water butts
Water butts