Riga Door Frame Extension Kit
Riga Door Frame Extension Kit – +20" Height | Riga III, IV & V
The Riga Door Frame Extension Kit adds 20 inches of height to the door frame of your Riga III, IV, or V greenhouse when the structure is mounted on a raised foundation. It fills the gap above the door opening that results from elevating the greenhouse, eliminating the need to build a custom step-over or workaround for the raised door frame.
*Free shipping only when purchased together with a Riga greenhouse. Ordered separately, standard shipping rates apply.
Key Features
- Adds 20" of height to the Riga door frame
- Designed for raised foundation installations — fills the gap above the door opening
- Compatible with Riga III, Riga IV, and Riga V greenhouse models
- Eliminates the need for a custom step-over or workaround at the door
- Purpose-built Riga accessory — no modifications required
Specifications
| Height Added | 20 inches |
| Compatible Models | Riga III, Riga IV, Riga V |
| Use Case | Raised foundation installations |
| SKU | RIGA-DOOR-FRAME-345 |
| Shipping | Free when purchased with a Riga greenhouse; standard rates apply when ordered separately |
When Do You Need This Kit?
When a Riga greenhouse is installed on a raised foundation — such as a concrete pad, timber base, or elevated platform — the door frame sits higher than the standard ground-level installation. This creates a gap above the door opening between the top of the door frame and the greenhouse structure. The Door Frame Extension Kit fills this gap cleanly and professionally, restoring the door to its intended appearance and function without custom fabrication.
If your Riga greenhouse will be installed at ground level on a standard base kit, you do not need this extension kit.
Frequently Asked Questions
Which Riga models is this kit compatible with?
This door frame extension kit is compatible with the Riga III, Riga IV, and Riga V greenhouse models. It is not compatible with the Riga XL or other Riga models. If you are unsure whether this kit fits your model, contact us with your greenhouse model number before ordering.
Do I need this kit if I’m using the standard Riga base kit?
Not necessarily. The standard Riga base frame raises the greenhouse by 6 inches. Whether you need the door frame extension depends on the total height of your foundation. If you are installing on a raised concrete pad, timber platform, or other elevated foundation that significantly raises the greenhouse above ground level, this kit is recommended. Contact us with your foundation height and we’ll confirm whether the extension kit is needed.
Why is free shipping only available when purchased with a greenhouse?
The door frame extension kit ships free when ordered together with a Riga greenhouse because it can be included in the same shipment. When ordered separately, it ships as a standalone item and standard shipping rates apply.
Is this a genuine Riga replacement/accessory part?
Yes — this is a purpose-built Riga accessory designed specifically for the Riga III, IV, and V door frames. It requires no modifications and fits the existing door frame structure directly.
Can I install this kit myself?
Yes — the extension kit is designed for straightforward installation without specialized tools. It attaches to the existing Riga door frame. Contact us if you need installation guidance specific to your model.