Shelving - When to Stop Adding It and Redesign Your Space

Most stores and warehouses grow a few bays at a time until one day it’s clear: adding more shelving isn’t fixing congestion, slow picks, or safety worries. That’s the point where you need a layout rethink, not another rack.

The warning signs

You’re likely there if:

• Aisles are routinely blocked and colleagues squeeze past each other.
• “Temporary” overflow on floors, in corridors, or on top of cabinets has become permanent.
• Picking is slower and staff are hunting for stock.
• No one can say which areas are truly full and which are just badly organised.

A quick snapshot helps: if large parts of the store are running at 80–90%+ utilisation with regular overflow, you’re beyond the comfort zone.

When extra shelving stops helping

More of the same rarely works when:

• Aisles are already at the narrowest safe width.
• Slow-moving or bulky items occupy prime, easy-access bays.
• You’ve got a mixed stock profile (long, short, heavy, light) forced into one pattern.
• Shelving has been added piecemeal for years and the space feels like a patchwork.

Here, the real question is: “How should this space work?” – not “Where can we squeeze another bay?”

Triggers for a redesign

Consider a partial or full redesign when:

• Key routes are consistently congested, even outside peaks.
• Service levels are under pressure and staff blame layout.
• New ranges, packaging, or higher SKU counts are coming.
• Headcount or working patterns have changed.
• A lease break, inspection, or planned investment window is approaching.

A redesign might mix static shelving for fast movers with higher-density solutions for archives and slow-moving stock, rather than applying one system everywhere.

A quick “stop or continue?” check

It’s time to rethink if you answer “yes” to several of these:

• Are aisles regularly blocked or uncomfortably narrow?
• Is more than 10–15% of stock stored on floors, tops, or ad-hoc locations?
• Do staff frequently move things out of the way to reach what they need?
• Have you already bolted on extra shelving multiple times in the last few years?
• Are you planning more SKUs or higher stock levels soon?

If most answers are “no”, a local re-layout and a bit more shelving may still be enough.

What a redesign delivers

A proper redesign can:

• Reclaim wasted volume and use height better.
• Shorten walk routes and speed up picks.
• Improve safety and comfort with clearer walkways and better storage heights.
• Make layouts more intuitive for new starters.
• Build in flexibility for future growth.

Over a five-year period, those gains usually outweigh the apparent saving of “just one more rack.

Start Your Journey

At IronStor we can help you to get the most from your space, our in house design teams can take even the most awkward spaces and maximise their capacity. Talk to us on: 01782 770100 or email: info@ironstor.co.uk to get started.