One of the most common questions homeowners ask when planning new flooring is how much they should order. Ordering too little can lead to delays, additional costs, and problems matching products later on. Ordering too much can mean unnecessary expense and wasted materials.
This guide explains how to calculate the right amount of flooring, why allowances are important, and how to avoid the most common mistakes that lead to shortages or excess.
Why ordering the correct amount matters
Flooring is typically manufactured in batches, and even identical products can vary slightly in colour, finish, or texture between production runs. If you don’t order enough material at the start, there’s a real risk that the same batch may no longer be available.
Running short can result in:
- Installation delays
- Additional delivery charges
- Difficulty matching colour or finish
- Incomplete or compromised layouts
Over-ordering, on the other hand, can mean paying for material you don’t need, especially if returns are not accepted on cut lengths or clearance items.
Getting the quantity right from the outset helps avoid all of these issues.
Measuring the space accurately
The first step is calculating the total area of the space to be covered, usually measured in square metres (m²).
For simple rectangular rooms:
- Measure the length of the room
- Measure the width of the room
- Multiply the two measurements together
For example:
4.2m × 3.6m = 15.12m²
For irregular-shaped rooms:
- Break the room into smaller rectangular sections
- Measure each section individually
- Add the totals together
Measurements should always be taken to the furthest points of the room, including alcoves, bay windows, chimney breasts, and door recesses.
Waste allowance: why it’s essential
Waste allowance accounts for offcuts, fitting cuts, mistakes, and layout requirements. This is where many people underestimate how much flooring they need.
General guidelines:
- Straight plank layouts: add 5–10%
- Rooms with multiple angles or obstacles: add 10–15%
- Herringbone or parquet patterns: add 10–15%
- Diagonal layouts: add 15% or more
For example:
- Measured area: 25m²
- Waste allowance (10%): 2.5m²
- Total to order: 27.5m²
The more complex the layout, the more important this allowance becomes.
Different flooring types require different planning
Vinyl and laminate
Plank length, locking systems, and laying direction all influence waste. Longer planks can create more offcuts in smaller rooms, while intricate layouts increase cutting requirements.
Even in simple rooms, vinyl and laminate should never be ordered to the exact measured size without allowance.
Carpet
Carpet is supplied in fixed-width rolls, commonly 4m or 5m wide. Because of this:
- Room width often determines waste, not length
- Planning seam placement is crucial
- Poor planning can result in large unused sections
Carpet quantities should always be planned with roll width and room shape in mind.
Patterned and tiled flooring
Herringbone, parquet, and tiled layouts require additional material to maintain symmetry and alignment. Running short during a patterned installation can make it impossible to complete the design properly.
Doorways, thresholds, and adjoining spaces
Another common oversight is forgetting transitional areas. Flooring often needs to extend:
- Through doorways
- Under door frames
- Into small connecting areas such as hallways or cupboards
These areas may seem minor but can quickly add to the total required amount.
Clearance flooring: planning is critical
Clearance flooring can offer excellent value, but it requires careful planning.
Key points to consider:
- Stock is often limited
- Re-ordering may not be possible
- Matching batches later is unlikely
When purchasing clearance flooring, it is generally safer to allow slightly more material to avoid shortages partway through installation.
Keeping spare flooring
Keeping a small amount of spare flooring is often recommended, particularly for:
- Future repairs
- Accidental damage
- High-traffic areas
A few spare planks or offcuts stored flat in a dry environment can make future repairs far easier.
Common mistakes to avoid
- Measuring only the main floor area and ignoring alcoves
- Ordering exact measurements with no allowance
- Underestimating patterned layouts
- Assuming all rooms are perfectly square
- Forgetting transitional areas
- Not checking whether re-orders are possible
These issues account for the majority of flooring shortages.
Professional measuring and accuracy
While measuring yourself can work for straightforward spaces, many factors affect how much flooring is actually required, including room layout, product dimensions, and installation method.
At Floors-2U, we offer a free measuring service with a free site visit, which helps ensure measurements are accurate and allowances are calculated correctly before any flooring is ordered. This can help reduce the risk of running short or over-ordering, particularly on more complex projects.
Final thoughts
Ordering the correct amount of flooring is about more than just measuring a room. Understanding layout, waste allowance, flooring type, and future needs can prevent unnecessary stress and expense.
Taking time to plan properly at this stage helps ensure your new flooring is completed smoothly and correctly the first time.
