Grandio Ascent 8×20

Name: 8x20 Traditional Greenhouse Kit | Grandio Ascent Series
Availability: InStock

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What type of foundation will you be installing on?

Your Ascent greenhouse includes a steel base kit for maximum stability. Simply select the appropriate anchor type for your foundation – concrete slab, wood decking, or earth/soil installation. See Foundation guide below for more details.

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Introducing the Grandio Ascent 8×20

Actual Size: 8’2″ W x 19’11” L x 7’9″ H

This is the one you’ve been waiting for – now at nearly 8′ tall!

This beautiful hobby greenhouse represents the perfect choice for both amateur and professional gardeners seeking commercial-scale growing space. Your Ascent greenhouse comes equipped with premium features including 6mm twin-wall panels, a heavy-duty powder-coated aluminum frame, impressive 7’9″ tall roof height, double-sliding doors, (5) roof windows with included vents, integrated base kit, rain gutters, snow load kit, and comprehensive long-term warranties.

Premium Accessory Package Adds ($539 Value):

(5) Auto Roof Vent Openers
(2) Packs of 10 Plant Hangers
(1) Trellis Kit
(1) Drip Kit
(1) 8 oz. Brillianize Cleaner

Rugged reliability, low cost of ownership, and accolades from reviewers are just a few reasons why Grandio Greenhouses wins over the world’s toughest users. Carefully engineered to perform in the harshest environments, the 1.6mm profile aluminum frame provides superior strength and durability compared to competitors. The heavy-duty construction paired with 6mm twin-wall polycarbonate panels delivers outstanding thickness for winter insulation.

An extensive range of features and accessories creates a well-ventilated growing space with gliding double doors and an easy-to-assemble system. With an estimated insulation R-VALUE* of 1.54 and heat loss U-VALUE* of 0.65, this greenhouse provides an exceptional gardening experience. The doors hang from above to eliminate jamming, while durable nylon door wheels ensure smooth operation for years.

Unmatched Warranty Protection

Our lifetime frame warranty and 10-year panel warranty represent more than peace of mind – they’re our commitment to exceptional quality, dependability, and reliability. Every Grandio Greenhouse is precision-manufactured to meet rigorous standards and engineered to withstand extreme wind and weather conditions.

*R-Value – measures the ‘insulating ability’ of materials. Higher R-Value = superior insulation performance.
*U-Value – measures ‘heat loss’ through materials. Lower U-Value = less heat escape.

Customize Your Setup

Want to replace the rear wall of your greenhouse with another entrance? Check out the back door transformation kit!

Attributes	Value
Choose Package (Basic or Premium)	Basic, Premium
Brand	Grandio Greenhouses

Technical details for those who need more.

Height: 7′ 9″
Width: 8′ 2″
Length: 19′ 11″
Frame: Heavy duty aluminum
Wind Rating: Withstands winds up to 76 mph*
Snow Rating: Maximum snow load of 25lbs./ft² of snow*
Color: Powder coated green
Panels: 6mm twin-wall UV protected polycarbonate.
Door Width: 42″
Doors: Bind-resistant sliding double-doors.
Latch: Easy-latch doors with double-ball catch
Tools: Included
Hardware: Stainless steel nuts and bolts
Reinforcement: Cross-roof truss and cross corner bracing
Gutters: Built-in rain gutters
Ventilation: (5) roof vents with adjustable manual openers/latches

* Please see the warranty page for further details

Looking for assembly instructions? Find them here.

This is your resource for finding complete assembly instructions for all Grandio Ascent Greenhouses. You can download the instructions in PDF format or you can view the assembly video. We’ve provided everything you need to get started with your new Grandio greenhouse. Have questions? Give us a call 1-866-448-8231.

» Download: 2015 Grandio Ascent 8×20 Manual

Note: In order to read the manuals, you need the Adobe Acrobat PDF reader.

You have questions, no problem, we have answers.

How easy is the Grandio to assemble? Very easy. We’ve designed and perfected the assembly process with you in mind. We provide the tools and a step-by-step assembly manual and video and if you have any problems you can call us at 1-866-448-8231.

Is a building permit required? You may not need a permit for your Grandio, but it is always a good idea check before you get started. We recommend you check local ordinances and requirements before setting up your greenhouse.

Is it strong enough for windy or heavy snow locations? Definitely. Grandio’s are all designed to withstand the most hostile environments with a wind rating of 76 MPH and snow load rating of 25lbs./ft² of snow. We offer additional roof and eave supports to increase the strength and durability of the greenhouse frame for the Element Greenhouses. Just follow the included directions for securing your greenhouse and you’ll enjoy many years of growing with your Grandio.

I live in the hot southwest will Grandio Greenhouses work for me? For people who live in high temperature areas of the country like Arizona, Texas, California, Nevada, or New Mexico we recommend our aluminum shade net. The aluminum shade net reflects the sun on the hottest days to help your greenhouse keep it’s cool.

How do the automatic roof vent openers work? The opener has a metal cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes the vent and resets the piston. The opening and closing of the vent is gradual allowing just the right amount of air flow for cooling. No electricity needed!

How large is the roof vent opening? The vent opening is 18-3/4″ width by 22-3/4” length.

What is the difference in polycarbonate thicknesses? Polycarbonate is available in several different thicknesses and normally comes in single, double, and triple walled sheets that can vary in thickness from 1mm to 10mm. A good rule to remember is that the thicker the panel the better insulation you’ll have for your greenhouse.

Can these greenhouse be mounted to a concrete pad? The Grandio comes standard with a base that is meant to anchor it in the soil with concrete footers or a duckbill anchor kit. However, it can be mounted to a concrete pad with additional tools and hardware. For more information please refer to our online manual or give us a call 1-866-448-8231 to discuss options.

Can’t wait for your Grandio? Here’s what to expect.

How many boxes will I receive?
Your new Grandio ships in 2 or more manageable-sized boxes (the exact number of boxes depends on the size of your greenhouse).

How is it shipped?
Grandio Greenhouses are generally shipped via UPS Ground.

Can I buy a Grandio if I live outside the USA?
Currently we can only ship orders to the USA and Canada. If you live in Canada and would like to place an order please call us at 1-866-448-8231.

How long will my order take to get to me?

- West: 2-4 business days
- Northwest: 1-3 business days
- Southwest: 3-5 business days
- Midwest: 4-6 business days
- East: 5-7 business days

Note: These are estimates and business days are the time your items are in-transit only and do not include order processing time. Inclement weather and unforeseen carrier or transportation emergencies may delay your delivery.