Level, stable foundation
Install the system on a level, reinforced concrete slab over a compacted, free-draining aggregate base. Keep the frame level from one bearing or support to the other.

Delivery, installation & site requirements
A little planning makes delivery and installation straightforward. Use this guide to prepare access, choose a stable location and understand what to expect when your Durvela system arrives.
What to expect
Large equipment deserves a clear plan. We review the important details before delivery so your site, access route and placement area are ready.
We confirm your selected model and review the information needed to plan its delivery.
You confirm the access route, prepared foundation and intended operating location.
Delivery timing and receiving requirements are coordinated for your destination and system.
Position the system on its prepared site, secure it as required and begin composting.
Prepare the location
Choose a location that remains stable, accessible and practical through every season. Final requirements depend on the Durvela model and conditions at your site.
Install the system on a level, reinforced concrete slab over a compacted, free-draining aggregate base. Keep the frame level from one bearing or support to the other.
Confirm gates, paths, slopes, turns and overhead restrictions along the route from the delivery point to the installation area.
Allow practical space to load, rotate, inspect and unload the drum, with access to serviceable components.
Avoid low areas where water collects and choose a location you can reach safely through wet, snowy or high-use seasons. If an overly wet compost mix produces occasional drips, place the system where they can be noticed and cleaned up, then add suitable dry, carbon-rich material to restore the moisture balance.
If using a solar-powered aeration accessory (optional for the 100, suggested for the 300, recommended for the 900 and required for the 2000), orient its panel (the unloading end of the composter) toward the sun for maximum sun exposure.
Anchoring is recommended for the Durvela 300 and 900, and required for the Durvela 2000. Each composter foot pad has four 12 mm holes; use exterior-rated M10 concrete anchors with suitable flat washers and approximately 60 mm (2⅜ in) effective embedment. Confirm foot locations before pouring and follow the anchor manufacturer’s requirements. Do not use M12 anchors or enlarge the holes.
Plan for your system
Use these equipment dimensions for early planning. Confirm current specifications and site requirements with Durvela before preparing a permanent foundation.
| Model | Capacity | Equipment dimensions | General foundation guidance |
|---|---|---|---|
| Durvela 120 | 120 L / 32 US gal | 1010 × 900 × 1350 mm / approx. 40 × 35 × 53 in | A firm, flat and non-sinking surface. A reinforced concrete slab is the recommended permanent installation base. |
| Durvela 300 | 300 L / 79 US gal | 1380 × 1100 × 1610 mm / approx. 54 × 43 × 63 in | A reinforced concrete slab over a compacted, free-draining aggregate base is recommended. |
| Durvela 900 | 900 L / 238 US gal | 2180 × 1250 × 1800 mm / approx. 86 × 49 × 71 in | Prepare a reinforced concrete slab and review placement and anchoring before delivery. |
| Durvela 2000 | 2000 L / 528 US gal | 3140 × 1350 × 1940 mm / approx. 124 × 53 × 76 in | A reinforced concrete slab with locally thickened support areas and a pre-delivery site review is required. |
Recommended concrete pads
The preferred sizes provide approximately 300 mm / 12 in of concrete beyond the equipment footprint on each side. This protects slab edges and provides practical room for placement and anchors.
| Model | Minimum slab | Preferred slab | Thickness | Anchoring |
|---|---|---|---|---|
| Durvela 120 | 1400 × 1300 mm / 55 × 51 in | 1600 × 1500 mm / 63 × 59 in | 100 mm / 4 in | Optional under normal residential conditions |
| Durvela 300 | 1800 × 1500 mm / 71 × 59 in | 2000 × 1700 mm / 79 × 67 in | 100 mm / 4 in | Recommended in exposed or public locations |
| Durvela 900 | 2600 × 1750 mm / 102 × 69 in | 2800 × 1950 mm / 110 × 77 in | 125 mm / 5 in | Recommended |
| Durvela 2000 | 3600 × 1850 mm / 142 × 73 in | 3800 × 2050 mm / 150 × 81 in | 150 mm / 6 in | Required |
Durvela 120 & 300
Durvela 900
Durvela 2000
Plan the complete installation
The slab is only one part of a successful installation. Review these items while the site can still be adjusted easily.
Allow the concrete to cure and reach the strength required by the concrete supplier, engineer and anchor manufacturer before placing the composter or loading its anchors. Coordinate the pour with the delivery date.
Confirm the current shipping weight, installed operating weight, centre of gravity and approved lifting points for your model. Select a forklift, crane or other handling equipment with suitable capacity, reach and site access.
Confirm model-specific clearance at the loading, unloading, crank and service sides. Keep doors, hoppers, guards and removable components unobstructed.
Locate buried electrical, gas, water, communications and drainage services before excavation or drilling. The site owner is responsible for applicable permits, utility clearances and local building, environmental and accessibility requirements.
Specify a durable, slip-resistant concrete finish. Avoid raised edges that create trip hazards, direct runoff away from the equipment and manage any washwater according to local requirements.
After initial use, recheck frame level, anchor tightness and accessible fasteners. Include these checks in the site’s routine inspection and maintenance schedule.
These recommendations are a conservative standard detail, not a site-specific engineered foundation. Soil, frost, wind, seismic conditions and local codes may require a different design. Have the Durvela 2000 foundation—and the Durvela 900 at a school, municipality, restaurant or other commercial site—reviewed by a local structural or geotechnical professional before concrete is poured.
Before delivery day
Review each item with the person receiving the shipment and anyone preparing the installation area.
Common questions
Durvela composters are supplied pre-assembled. Delivery and placement requirements vary by model and destination, so confirm the final receiving plan with Durvela.
No permanent installation should rely on soil or grass, which can settle and hold water. Durvela recommends a level, reinforced concrete slab over a compacted, free-draining aggregate base. Use the model-specific slab sizes and thicknesses on this page, subject to local site and code requirements.
Allow enough room to load the hopper, rotate the drum, inspect components and remove finished compost from the unloading end. Required working space depends on the model and site layout; request the current dimensions before finalizing the location.
The standard rotary system does not rely on a permanent grid-power connection for normal placement. Optional accessories may have their own requirements; confirm the accessories included with your order.
Receiving requirements depend on the model, destination and delivery method. Durvela will help clarify the delivery arrangement so you can have the appropriate access, people and handling plan ready.
Confirm the selected model, current dimensions, support-foot and anchor locations, and site guidance before constructing the slab. This helps avoid preparing a pad that does not suit the final system or delivery plan.
Plan with confidence
Tell us which system you are considering and where it will be installed. We will help you identify the delivery and placement details to confirm before ordering.