Top Shelf for Riga IV: 10" wide x 13'10" long
Top Shelf for Riga IV Greenhouse
The Riga IV Top Shelf is a purpose-built upper-tier polycarbonate shelving unit for the Riga IV greenhouse. Narrower and higher than the bottom shelf, it is designed for smaller plants, seedling trays, and propagation work at eye level — with polycarbonate inserts that allow light to pass through to the plants and shelves below. Each unit covers one side of the greenhouse.
*Free shipping only when purchased together with a Riga greenhouse. Ordered separately, an additional shipping charge applies.
Key Features
- Twin-wall polycarbonate shelf surface with polycarbonate inserts — maximizes light transmission to plants below
- 10" deep × 13'10" long — sized for the full interior length of the Riga IV
- Suspended shelving — positioned high in the greenhouse for seedlings, small pots, and propagation trays
- Each unit covers one side of the greenhouse — order two for full double-sided top shelving
- Purpose-built for the Riga IV — engineered to fit the Riga IV frame exactly
Specifications
| Compatible Model | Riga IV |
| Shelf Depth | 10 inches |
| Shelf Length | 13 feet 10 inches |
| Shelf Position | Top / upper tier (suspended high) |
| Material | Twin-wall polycarbonate with polycarbonate inserts |
| Light Transmission | Yes — polycarbonate inserts allow light through to plants below |
| Coverage | One side of the greenhouse per unit |
| SKU | RIGA-IV-TOP-SHELF |
| Price | $439 per unit (one side) |
| Shipping | Free when purchased with a Riga greenhouse; additional charge when ordered separately |
Top Shelf vs. Bottom Shelf — How They Work Together
| Feature | Top Shelf (this product) | Bottom Shelf |
|---|---|---|
| Depth | 10 inches | 25 inches |
| Length | 13'10" | 13'10" |
| Position | Upper tier — suspended high | Regular height — suspended with braces |
| Light Transmission | Yes — polycarbonate inserts | Standard polycarbonate |
| Best For | Seedlings, small pots, propagation trays | Larger plants, staging, storage underneath |
| Price (per side) | $439 | $624 |
Many Riga IV growers use both tiers together: the bottom shelf for larger plants and staging, and the top shelf for seedlings and propagation at eye level. Full two-tier shelving on one side of the Riga IV costs $439 + $624 = $1,063 per side, or $2,126 for both sides.
Riga Top Shelf Series — Which Top Shelf Do You Need?
| Model | Top Shelf Length | Price (per side) | Full Double-Sided |
|---|---|---|---|
| Riga IIs | 7' | $319 | $638 |
| Riga IIIs | 10'4" | $379.99 | $759.98 |
| Riga III | 10'4" | $379.99 | $759.98 |
| Riga IV | This shelf — 13'10" | $439 | $878 |
All Riga top shelves share the same 10" depth and polycarbonate insert design. Length and price scale with each greenhouse’s interior length. Order the top shelf that matches your exact greenhouse model.
Frequently Asked Questions
Does one unit cover both sides of the Riga IV?
No — each unit covers one side of the greenhouse only. To add top shelving to both sides of your Riga IV, you will need to purchase two units ($439 × 2 = $878 for full double-sided top shelving).
Is there a separate top shelf for the Riga IVs (smaller "S" variant)?
The Riga IVs may require a model-specific top shelf. Contact us with your exact model number to confirm the correct top shelf before ordering.
Can I use the top shelf and bottom shelf together in the same Riga IV?
Yes — the Riga IV top and bottom shelves are designed to work together as a two-tier shelving system. The top shelf sits higher in the greenhouse for seedlings and small plants, while the bottom shelf provides a wider surface at regular working height with storage space underneath. The polycarbonate inserts in the top shelf allow light to reach the bottom shelf and floor below.
Why does the top shelf have polycarbonate inserts?
The polycarbonate inserts allow natural light to pass through to the plants and shelves below. Without light-transmitting inserts, a solid upper shelf would cast shade on everything beneath it — reducing growing conditions on the bottom shelf and floor. The polycarbonate inserts maintain light levels throughout the greenhouse interior.
Is this shelf compatible with other Riga models?
This top shelf is engineered specifically for the Riga IV footprint (13'10" interior length). Other Riga models have different interior lengths and require their own model-specific shelving. See the series table above for all available top shelf models.
Why is free shipping only available when purchased with a greenhouse?
The shelf ships free when ordered together with a Riga IV greenhouse because it can be included in the same freight shipment. When ordered separately, it ships as a standalone item and an additional shipping charge applies due to its size.