EXTRA 13% OFF MANY ALTON GREENHOUSES-DISCOUNT ALREADY INCLUDED. JUST ADD TO CART.
Alton Cheltenham Cedar Greenhouse with Wood Wall
The Alton Cambridge T-Shaped Cedar Orangery is a beautifully designed, durable greenhouse built with the same trusted construction as the Alton Evolution range. Crafted with exceptional attention to detail, it eliminates common rot points and is guaranteed for 15 years untreated—or expected to last 30–40 years when treated.
Features and Specifications of the Alton Cheltenham Cedar Greenhouse
We are currently offering 4 sizes: Here are the common specs of All the Cheltenham Greenhouses
🌳Western Red Cedar : The Alton Evolution models use thick glazing bars which are based on 44x 44mm timbers or 44x69mm in places.
🌳 Extremely strong frame - This is the strongest greenhouse you can currently buy (Combination of wood or aluminum). It really is that sturdy!
🌳 Included: aluminum capping (for additional water protection)
🌳All wood is Grade 1 Western Cedar from Canada dipped and sealed (NO knots)
Constructed with mortise-tenon and tongue-grooveassembly and stainless steel hardware
🌳 Uses only single sheets of 3mm toughened tempered glass, instead of the more common overlapping smaller sections
🌳 With large pane toughened glass, you get a greenhouse that looks far neater, is easier to keep clean, and of course is safer.
🌳 Shelves included for great horizontal use of space.
🌳 Beautiful English Victorian Ridge Decorations
🌳 One set of Hinged doors that swings inward.
🌳 Very secure Door Lock.
🌳Guttering and Downpipes both sides are included as standard
🌳 Aluminum base frame designed to raise wood framing from ground exposure
🌳 Knee brace spandrels at EVERY rafter intersection: at both the ridge and the shoulders/gutters.
🌳Extended units also use additional wooden trusses
🌳 Includes: gutters with down spouts
🌳Individual wood pieces will vary greatly in color (light to dark).
🌳 The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
🌳 Made in UK 🇬🇧
🌳 Warranty: 15 Year Limited Warranty.
1st Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x12ft6"x 10ft
Dimensions:
A: Base Width2650 mm (8ft8)
B: Length 3846 mm (12ft7)
C: Eaves Height 1708 mm (5ft7)
Side Wall Height 1708 mm (5ft7)
D: Ridge Height3070 mm (10ft0)
E: Door Width743 mm (2ft5)
F: Door height2012 mm (6ft7)
G: Area: 108.33 sq. ft.
I: Roof Pitch: 45 degrees
Specs:
🌳 Area: 108 sq. ft.
🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
🌳 4 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
🌳 2 louvered window With Manual Openers
🌳 One set of single Hinged door (Lockable Door with Keys)
🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
🌳 Victorian Ridge Cresting
🌳 Aluminum Bar Metal Capping
🌳 Tall design – 10 ft for peak height –
🌳 Free 10 Year Guarantee
🌳 Roof Pitch: 45 degrees
2nd Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x16ft8"x 10ft
Dimensions:
A: Base Width2650 mm (8ft8)
B: Length5106 mm (16ft9)
C: Side Wall Height1708 mm (5ft7)
D: Ridge Height3070 mm (10ft0)
E: Door Width743 mm (2ft5)
F: Door height2012 mm (6ft7)
G: Area: 144.9 sq. ft.
I: Roof Pitch: 45 degrees
Specs:
🌳 Area: 144.9 sq. ft.
🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
🌳 4 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
🌳 3 louvered window With Manual Openers
🌳 One set of single Hinged door (Lockable Door with Keys)
🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
🌳 Victorian Ridge Cresting
🌳 Aluminum Bar Metal Capping
🌳 Tall design – 10 ft for peak height –The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
🌳 Roof Pitch: 45 degrees
🌳 Free 10 Year Guarantee
3rd Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x18ft x 10ft
Dimensions:
Specs:
🌳 Area:163 sq. ft.
🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
🌳 5 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
🌳 4 louvered window With Manual Openers
🌳 One set of single Hinged door (Lockable Door with Keys)
🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
🌳 Victorian Ridge Cresting
🌳 Aluminum Bar Metal Capping
🌳 Tall design – 10 ft for peak height The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
🌳 Free 10 Year Guarantee
🌳 Roof Pitch: 45 degrees
4th Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x20ft10" x 10ft
Dimensions:
Specs:
🌳 Area:181 sq. ft.
🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
🌳 6 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
🌳 4 louvered window With Manual Openers
🌳 One set of single Hinged door (Lockable Door with Keys)
🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
🌳 Victorian Ridge Cresting
🌳 Aluminum Bar Metal Capping
🌳 Tall design – 10 ft for peak height –The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
🌳 Free 10 Year Guarantee
🌳 Roof Pitch: 45 degrees
Important Shipping & Delivery Information
🌿Curbside Delivery
🌿Delivery is done through LTL Motor Freight and is free, unless you live in an area with limited access (i.e. island etc...this is extremely rare) this might incurr extra fees.
🌿We ship using an 18 wheeler (let us know if there are tight roads or low hanging wires, manufacturer cannot guarantee the availability of a smaller truck)
🌿 Someone will need to be available to receive the greenhouse. We will call to set up a delivery timeframe. Driver might need help although he will do most of the work.
Current lead time: if item is in stock then 1 to 2 weeks to process and package then 5 to 7 business days for delivery. If item is not in stock, this will be considered a special order and might take between 12 to 14 weeks. Contact us and we will let you know about current lead time.
🌿Delivery is done through LTL Motor Freight and is free, unless you live in an area with limited access (i.e. island etc...this is extremely rare) this might incurr extra fees.
🌿We ship using an 18 wheeler (let us know if there are tight roads or low hanging wires, manufacturer cannot guarantee the availability of a smaller truck)
🌿 Someone will need to be available to receive the greenhouse. We will call to set up a delivery timeframe. Driver might need help although he will do most of the work.
Video and Picture Gallery
108 sq ft (8x12), 144.9 sq ft (8x16), 163 sq ft (8x18) or 181 sq ft (8x20)Floor area
8' 8" W x 12' 7", 16' 9", 18' or 20' 10" L x 10' HExterior size
Grade 1 Western Red Cedar, knot-free, dipped and sealedFrame
3 mm toughened safety glass, large single panesGlazing
4 (8x12 and 8x16), 5 (8x18) or 6 (8x20), automatic openers at 71 degreesRoof windows
10-year framework guarantee (moving parts 12 months)Warranty
Exaco · Hobby Greenhouse
Overview
The Cheltenham pairs a solid cedar lower wall with tall glass for a classic Victorian look. It shares its construction with the Alton Evolution range: thick glazing bars cut from 44 x 44 mm timbers, and 44 x 69 mm in places, with the common rot points designed out.
All the wood is Grade 1 Western Red Cedar from Canada, knot-free, dipped and sealed. Mortise-and-tenon and tongue-and-groove joints, stainless steel hardware and knee brace spandrels at every rafter keep the frame strong, while aluminum capping and an aluminum base frame protect the timber from water and ground moisture.
The 10 ft ridge gives your plants a better atmosphere and gives you room to stand tall. Roof windows open on their own at 71 degrees with no power, louvered side windows add airflow, and shelving, gutters and downpipes come standard.
Our tip: Keep the cedar treated and the greenhouse is expected to last 30 to 40 years.
Why customers choose it
Classic cedar, built to last
Knot-free Western Red Cedar
Grade 1 Canadian cedar is dipped and sealed, with thick glazing bars and the common rot points designed out.
Hands-free ventilation
Roof windows open automatically at 71 degrees with no power, and louvered side windows open by hand.
Room to stand and grow
A 10 ft ridge and 45 degree roof pitch give plants a better atmosphere and give you real headroom.
Large toughened glass panes
Single sheets of 3 mm toughened safety glass look neater, clean up faster and are safer than small overlapping panes.
Ready to use
Slatted shelving runs along one long side, and gutters and downpipes on both sides come standard.
Protected from the ground up
An aluminum base frame keeps the cedar off the ground, and aluminum capping sheds rain.
The details
Specifications
Size
Floor area
108 sq ft (8x12), 144.9 sq ft (8x16), 163 sq ft (8x18) or 181 sq ft (8x20)
Exterior size
8' 8" W x 12' 7", 16' 9", 18' or 20' 10" L x 10' H
Walking height
5' 7" at the sides, 10' at the ridge
Roof pitch
45 degrees
Structure
Frame
Grade 1 Western Red Cedar, knot-free, dipped and sealed
Glazing bars
44 x 44 mm timbers, 44 x 69 mm in places
Glazing
3 mm toughened safety glass, large single panes
Walls
Cedar wood lower walls
Joinery
Mortise-and-tenon and tongue-and-groove, stainless steel hardware
Base
Aluminum base frame
Gutters
Gutters and downpipes on both sides
Made in
UK
Doors and ventilation
Door
2' 5" W x 6' 7" H single hinged door, lockable with keys
Roof windows
4 (8x12 and 8x16), 5 (8x18) or 6 (8x20), automatic openers at 71 degrees
Louvered windows
2 (8x12), 3 (8x16) or 4 (8x18 and 8x20), manual openers
Assembly and warranty
Warranty
10-year framework guarantee (moving parts 12 months)
Plan, build and permit
Technical documents
Every manual, drawing and certificate is hosted on our own servers, so the links always work. Open on any device or save a copy for your builder or permit office.
There are four sizes, all 8' 8" wide with a 10 ft ridge: about 8x12 (108 sq ft), 8x16 (144.9 sq ft), 8x18 (163 sq ft) and 8x20 (181 sq ft). Choose the size in the options above.
Do the roof windows need power to open?
No. Every roof window has an automatic opener that opens at 71 degrees with no power needed. The louvered side windows open by hand.
How tall is it inside?
The side walls are 5' 7" high and the ridge reaches 10 ft, with a 45 degree roof pitch. The door opening is 2' 5" wide and 6' 7" high.
What comes with it?
Every size includes slatted shelving along one long side (a 12" two-slat shelf and a 20" four-slat shelf, top and bottom), gutters and downpipes on both sides, Victorian ridge cresting, aluminum bar capping and a lockable hinged door with keys.
How long will the cedar last?
It is built from Grade 1, knot-free Western Red Cedar from Canada that is dipped and sealed, sitting on an aluminum base frame that keeps the wood off the ground. Treated regularly, it is expected to last 30 to 40 years.
What warranty does the Cheltenham have?
Alton gives every Cheltenham a free 10-year framework guarantee. It covers the cedar frame against faulty manufacture, and against rot as long as you clean the greenhouse once a year. Moving parts are guaranteed for 12 months. Glazing, wind damage, labor and accidental damage are not covered.
Is shipping really free?
Yes. Shipping is free. Locations with limited access, such as islands, are rare exceptions that may carry an extra fee, and we'll tell you before anything ships.
Do you offer a price match?
Yes. If you find the same greenhouse for less from an authorized dealer, call or email us with the offer and we'll review it.
Are you an authorized retailer?
Yes. Mulberry Greenhouses is an authorized retailer, so your greenhouse is covered by the full manufacturer warranty.