Open modular shelves look simple on a drawing: a run of uprights, a set of shelves, no doors. That simplicity is exactly why the specification slips. A shelving wall that reads well in a render can fail on site because nobody fixed the span, the load, the wall condition or the finish schedule early enough. Below are the project details that actually decide which open modular shelving system works — and what to confirm with your supplier before an order is placed.
Start With the Room Type, Not the Shelf Layout
The same open shelving language behaves very differently across a villa living room, a guest-room wardrobe wall and a bathroom. Before choosing bay sizes, decide which environment the unit sits in, because that choice drives material, fixing method and tolerance.
| Setting | What changes in the specification |
|---|---|
| Living room or study wall | Bay proportions and sightlines matter most; shelving usually shares a wall with media, lighting and joinery, so the layout has to coordinate with those elements. |
| Bedroom and dressing area | Storage depth, hanging heights and drawer positions drive the grid; see open wardrobes when shelving is part of a dressing wall rather than a display piece. |
| Bathroom or laundry | Humidity, splash zones and cleaning products narrow the material and edge options; confirm the board and finish selection with the supplier for wet areas. |
| Office and hospitality common areas | Higher public traffic means more attention to edge durability, fixings and replacement parts, plus a consistent finish across many identical rooms. |
For wall-wide schemes in living spaces, open modular units are typically specified as part of a larger built-in composition, which is where the coordination question starts.
Dimensions and Tolerances: The Details That Fail on Site
Modular means repeatable units, not off-the-shelf sizes. Made-to-measure sizing is the norm for project shelving, so the numbers you send are the numbers that get cut.
- Floor and wall reality. Record finished floor levels, wall plumb and any skirting, cornice or coving to be retained. A run that is square on a plan can meet a wall that is 20 mm out of plumb, and the scribe detail has to be agreed in advance.
- Ceiling height and the top condition. Decide whether the unit stops below the ceiling with a shadow gap, meets the ceiling with a filler, or runs floor-to-ceiling as a full wall system such as floor-to-ceiling modular shelving.
- Bay span and shelf depth. Longer unsupported spans need a thicker shelf or an intermediate support; state the intended span next to each bay instead of assuming one board thickness covers the whole run.
- Reveal, scribe and shadow gaps. These small dimensions should appear on the shop drawing. Their absence is the most common cause of rework once a modular wall is installed against a finished surface.
Load, Span and What the Shelves Must Actually Carry
A display shelf holding two ceramics and a book is not the same engineering case as a library bay. Tell the supplier what goes on each part of the run:
- Books, archives or catalogue stock — heavy, concentrated, and best kept in lower bays with shorter spans.
- Display objects, art, retail product — lighter, but the fixing behind them matters as much as the shelf.
- Tableware, linen or bathroom supplies — moderate weight in deeper bays, often near moisture.
- Equipment such as media components, amplifiers or small appliances — needs ventilation and cable routes planned into the layout.
Where loads vary along one wall, split the elevation into zones on the drawing rather than asking for a single uniform grid. Metal-framed shelving is often specified where the frame itself carries the load and the shelves sit within it; metal frame modular systems are the version to review when a slim profile and long spans are both required.
Material, Finish and Edge Detail
Open shelving shows every edge. There is no door to hide a cheap profile, so the finish schedule is more visible than it is for closed cabinetry.
- Board and substrate. Confirm what core material is being quoted and whether it suits the room environment you specified.
- Surface finish. Matte, high gloss, wood veneer or textured laminate all read differently under lighting; match the sample to the actual light fitting, not to a showroom wall.
- Edge treatment. Ask how shelf edges are finished and whether that edge detail is consistent between uprights, shelves and any closed units in the same composition.
- Colour consistency across rooms. For hotels and multi-unit residential work, fix the finish code and batch process before repeating a layout across floors.
Where shelving is mixed with closed storage in one wall — a common way to keep display areas tidy — modular systems combining open and closed elements let you set the open-to-closed ratio per room instead of choosing one solution for the whole project.
Mounting Method and Substrate
How the system attaches is a project detail, not an installer's decision on the day.
| Mounting approach | Project information you need first |
|---|---|
| Wall-fixed floating shelves | Substrate type (stud, brick, block, plasterboard), embedded services, and the batten or cleat system to be built into the wall — see floating modular shelves for this configuration. |
| Floor-supported units | Floor finish build-up and skirting detail, plus whether the unit must be restrained in high-traffic areas. Freestanding open shelves suit rooms where walls cannot be opened up. |
| Full-height framed systems | Clear ceiling height, access for panels, and whether the frame passes through cornices or service zones. |
Send the substrate construction through with the order. A supplier who knows the wall is plasterboard over studs can design the fixing detail; a supplier who only receives dimensions cannot.
Lighting, Services and Coordination With Other Trades
Integrated shelving lighting turns a joinery item into an electrical one. If shelf-mounted lighting is intended, settle these points before production:
- Which bays are lit and where the driver, transformer and dimmer will sit — accessible, but out of the display line.
- Where cables enter the unit and whether that route is inside a wall cavity or a service void agreed with the M&E contractor.
- Switching and control: hard-wired, plug-in, or sensor operated, and who supplies the fitting versus who supplies the wiring.
- Maintenance access for replacement, since recessed fittings inside fixed shelving are expensive to reach after handover.
Lit shelving is normally coordinated as part of the joinery package rather than bought separately from the lighting schedule; modular shelving with integrated lighting keeps the shelf profile and the light line in one drawing set.
Quantities, Phasing and Repeats Across a Project
For villas, shelving is usually one-off. For hospitality, apartments and offices, the same elevation repeats dozens of times, which changes what to fix and when:
- Approve one prototype or first-article room before repeating a layout across floors or buildings.
- Number every unit on the drawing so deliveries can be phased by room or floor rather than arriving as one unsorted package.
- Order spare shelves, uprights and fixings with the main package; replacements ordered later rarely match an aged finish.
- Keep the finish code, board thickness and hardware schedule on file for future phases or refurbishment.
If shelving is one line item among many in a fit-out — cabinetry, doors, wall panelling, flooring — grouping those packages with one manufacturer reduces interface risk. That is the practical reason project buyers specify built-in furniture and interior fixtures together instead of sourcing each trade separately.
Documentation to Send Before the Quote Is Finalised
1. Room-by-room elevations with finished floor and ceiling levels marked.
2. Load description per bay zone (display, books, equipment, supplies).
3. Substrate construction and any restrictions on wall fixings.
4. Finish schedule with the board, edge detail and hardware called out.
5. Lighting intent, including control method and driver location.
6. Quantities by unit type, plus delivery phasing by floor or room.
7. Interface notes: skirting, cornice, doors, windows, radiators, sprinklers, sockets.
Frequently Asked Questions
Are open modular shelves made to measure or standard sizes?
For project work they are normally made to measure: dimensions, layout, material and finish are specified per space, so the grid can be tuned to bay span and load instead of forcing the room into a catalogue size.
Can shelving match my cabinetry finish exactly?
It can, provided the same board, surface and edge specification is quoted for both. Specify shelving and open shelving in kitchen cabinetry from one finish schedule so uprights, shelves and cabinet fronts share the same material code.
What is the difference between open modular shelves and a bookshelf system?
A shelving system is usually designed as part of a wall composition, where bays can vary in size and combine with closed units. A bookshelf layout is typically a regular grid sized for books; modular bookshelf systems are the better reference when the load is uniformly heavy.
Who installs built-in modular shelving?
Either the supplier's installation team or your local contractor, as long as the fixing details, setting-out dimensions and interface conditions are agreed in writing beforehand. Confirm who is responsible for wall preparation, making good and any electrical connection before the package is ordered.
If you are specifying open modular shelves for a villa, apartment or hospitality project, send the elevations, substrate information and load notes together. That single step is what turns a shelving detail on a drawing into a wall that installs cleanly on the first visit. As one supplier of both built-in furniture and interior fixtures, SANTERSON produces shelving walls to the dimensions, finishes and layouts issued for each project, and coordinates them with the cabinetry, doors and wall panelling in the same package.