Eaves Cupboard Organisation: Drawer Organisers & Internal Pull-Outs for Sloped Ceilings

February 5, 2026

An internal pull-out is an internal drawer concealed behind a hinged door, making the deep, hard-to-reach storage space of an eaves cupboard fully accessible by extending out completely.

A cupboard under a sloped ceiling, often referred to as an eaves or knee-wall cupboard, features a distinct geometry: it is exceptionally deep at the bottom but offers very little usable height towards the top. An eaves cupboard without runners is like a deep well without a bucket – items at the very back remain out of reach. Standard shelves are ergonomically inefficient here. The technical solution for joiners and skilled fitters lies in retrofitting internal drawers combined with matching organisation systems.

This guide defines the technical parameters that must be considered when selecting runners, drawer boxes, and internal fittings for sloped ceiling cupboards.

Key Buying Criteria for Internal Pull-Out Drawers

When planning concealed drawer systems in eaves spaces, exact dimensions and mechanical load limits must be calculated.

Installation Depth and Nominal Length

The nominal length of the drawer runner defines the depth of the drawer. Eaves cupboards frequently have carcass depths ranging from 600 mm to over 800 mm. The nominal length of the runner must always be less than the internal carcass depth. As a rule of thumb: internal carcass depth minus a 10 mm to 15 mm tolerance yields the maximum nominal length of the runner. Common standard lengths for runners range from 250 mm - 800 mm.

Dynamic Load Capacity

Deep drawers tempt users to store a lot of weight. The load capacity of the runner (specified in kg) refers to the combined weight of the drawer box and its contents when fully extended.

For lightweight clothing or bed linen, standard runners rated at 30 kg are sufficient.
If tools, files, or heavy winter coats are stored in the eaves, the specification must increase to 45 kg, 60 kg, or more.

Extension Loss: Full Extension vs Single Extension

A full extension runner can be pulled out to 100% of its nominal length from the cabinet carcass. The rearmost section of the drawer sits completely in front of the cabinet edge. A single extension (partial extension) runner stops by design at around 75% to 80% of its travel. Especially in deep eaves cupboards, a single extension runner leaves the rear section concealed in the darkness of the roof slope.

Types of Drawer Runners for Loft Conversions

The choice of runner mechanism dictates running smoothness, weight capacity, and mounting method.

Ball Bearing Runners

Mounted to the sides of the drawer box, these runners operate using steel ball bearings in a cage. They offer exceptional lateral stability and are ideal for heavy loads. They require precise gaps between the internal carcass wall and the drawer side (often exactly 12.7 mm or 13 mm per side, depending on the manufacturer). For deep eaves, heavy-duty drawer runners are the most technically robust choice.

Undermount Runners

Here, the runner hardware is concealed beneath the drawer base. The side panels of the drawer remain visually clean. Undermount runners absorb minor cabinet construction tolerances more effectively, but require accurate routing or notching on the rear panel of the drawer box.

Motion Mechanisms: Soft-Close and Push-to-Open

Soft-Close: An integrated hydraulic or pneumatic damper cushions the momentum of the drawer over the final few centimetres and pulls it shut smoothly and quietly. Drawer runners with soft-close protect materials and prevent contents from sliding around.
Push-to-Open: A mechanical ejection mechanism that opens the drawer upon pressing the front. This is essential for handleless designs.

Soft-close and push-to-open are opposing mechanisms. While a damper pulls the drawer closed, push-to-open pushes it open. Combined systems are mechanically complex and require dedicated tensioning units.

Internal Organisation: Drawer Organisers and Non-Slip Mats

When pulling out a 700 mm deep drawer, momentum affects the contents. Without division, clutter quickly builds up. Structuring is achieved through two components:

Grip: The base of the internal drawer should be lined with a custom-cut non-slip drawer mat. These textured or rubberised mats prevent loose items from sliding backwards during opening and closing.
Compartment Division: Mechanical drawer inserts comprising longitudinal and transverse divider profiles segment the usable space. For deep drawers, a modular system with push-fit connectors is ideal to adapt to varying items.

Which System for Which Application? (Decision Guide)

The choice of hardware depends on the structural dimensions of the eaves:

When the eaves are extremely deep (e.g. 700 mm): Always select full extension drawer runners with a load capacity of at least 45 kg. This is the only way to make the rear third usable without overloading the runners through leverage forces.
When the eaves are shallow (e.g. 300 mm to 350 mm): A compact ball bearing runner is often sufficient. Drawer runners 300 mm are ideal for smaller divisions, such as socks or accessories.
When storing heavy tools or files: Opt for heavy-duty ball bearing runners rated at 80 kg to 100 kg. For these, carcass fixings (typically chipboard screws with a 4 mm or 5 mm diameter and TX drive) must be long enough to transfer shear loads into the cabinet side panel.

Technical Installation Notes for Internal Drawers

Installing internal drawers behind a hinged door introduces a specific geometric challenge: door protrusion.

When a cabinet door is opened using a standard concealed hinge (opening angle approx. 110°), the edge of the open door protrudes into the internal clear opening of the carcass. Pulling the internal drawer out will cause it to collide with the door or hinge arm. There are two technical solutions to prevent this:

Fit spacer strips: On the hinge side, a spacer strip is installed between the internal carcass wall and the drawer runner. This bridges the door protrusion. The thickness of the strip depends on the hinge used, typically measuring 25 mm. The drawer box must be built narrower to compensate.
Use wide-angle hinges: The neater solution is replacing the concealed hinges. A wide-angle hinge with a 155° or 165° opening angle and zero protrusion swings the door completely clear of the internal opening. The drawers can then be mounted flush to the carcass wall (accounting only for the runner clearance).

Mounting the runners to the carcass is ideally done using the System 32 grid. If the cabinet features 32 mm line drilling with a 5 mm hole diameter, the runners can be installed perfectly level and plumb using compatible Euro screws.

Frequently Asked Questions (FAQ)

Can I use standard drawer runners for internal drawers? Yes, the running mechanism is identical. However, you must ensure the front panel of the internal drawer does not catch on the cabinet door hinges. Use either spacer strips or zero-protrusion hinges.

What load capacity do I need for a 600 mm deep pull-out? For a 600 mm deep drawer in an eaves cupboard, choose a runner rated to at least 40 kg to 45 kg. Due to the significant depth, full extension creates substantial leverage on the runners, even when storing lightweight textiles.

How thick does the spacer strip need to be for internal drawers? The thickness of the spacer strip depends on the door protrusion when open. With standard concealed hinges (110°), the door and hinge arm often protrude 20 mm to 25 mm into the carcass. A 25 mm spacer strip on the hinge side is sufficient in most cases.

What is the difference between full extension and single extension? A single extension runner opens to only around 75% of its length, leaving the rear part of the drawer inside the carcass. A full extension runner extends to 100% of its nominal length, allowing completely unobstructed access to the entire drawer contents from above.

Can soft-close and push-to-open be combined? With standard drawer runners, it is an either-or choice. Soft-close dampens and retracts the drawer, whereas push-to-open ejects it. High-end specialised systems exist that combine both functions, though they require precise mechanical synchronisation.