A quotation is a stack of independent cost blocks, not a single price. This guide shows you how to take any supplier's per-square-metre number apart so you can compare like for like.
Steel prices move with the market, so a noise barrier quote is never a fixed number — it floats with raw-material costs and logistics. What you can control is how the quote is built. The total cost per square metre is the sum of panel type, posts and foundations, coating, height and wind load, and freight and installation. Read it as a bill of materials, not a headline price.
Every metal noise barrier is built on steel and aluminium. When those commodity prices rise, the panel and post cost rises with them.
A per-square-metre quote is only meaningful if you know what it includes. Two suppliers can quote the same "panel price" while one bundles posts, coating and packing and the other lists them separately. The first rule of reading a noise barrier quotation is to ask for a line-item bill of materials — panel, post, foundation hardware, coating, packing and freight each on its own line.
This guide does not quote market prices. Prices change weekly with the steel index, so any absolute figure printed here would be wrong by the time you read it. Instead it gives you the structure of a quote so you can judge whether a supplier's number is complete and reasonable.
The verified specification envelope we build from is documented on the noise barrier specifications page: panel height 1.0–6.0 m, sheet thickness 0.8–1.5 mm, modular panel lengths 1.96 / 2.46 / 3.0 m, H-section posts at 2.0–4.0 m spacing, and NRC 0.80–0.95 / STC 25–35 dB acoustic performance.
Typical share of a supplied-and-delivered noise barrier wall, expressed as a range because every project is different.
| Cost block | What it covers | Typical share of total |
|---|---|---|
| Panels | Face sheet, absorptive core, frame, transparent modules | 35% – 50% |
| Posts & foundations | H-steel posts, base plates, concrete foundation, anchor bolts | 20% – 32% |
| Coating | Hot-dip galvanizing, powder coat, RAL colour, duplex system | 6% – 14% |
| Height & wind engineering | Extra mass, post size and bracing for tall / high-wind walls | 5% – 12% |
| Freight & install | Packing, sea/land freight, on-site erection (if supplied) | 8% – 20% |
Shares are illustrative ranges for a typical highway or industrial wall supplied as materials. A short, low wall on a cheap freight lane will lean toward panels; a 6 m coastal wall leans toward posts, coating and wind engineering. Use the ranges to sanity-check a quote, not as a price.
Within the panel block, the construction you choose sets the floor and the ceiling of the cost.
Full-metal reflective panels are the leanest: a single galvanized steel skin with no absorptive core. They reflect noise back to the source side, which is fine for many industrial boundaries but not for traffic where reflected sound is a problem.
Absorptive panels (louvered or micro-perforated over a mineral-wool or fibre core) add the core material and a more complex double-skin frame, moving them into the middle of the range. They are the standard for highways and railways.
Transparent panels (polycarbonate or PMMA) usually sit at the top of the panel range because the sheet itself is costly and impact/UV engineering is demanding. They are chosen for sightlines, not economy. Sheet thickness 0.8–1.5 mm and the chosen colour (any RAL) also nudge the panel price.
Take one hypothetical 1,000 m² absorptive highway wall and split a notional 100 budget units by the ranges above.
| Cost block | Share used | Of 100 units |
|---|---|---|
| Panels (absorptive) | 42% | 42.0 |
| Posts & foundations | 26% | 26.0 |
| Coating (HDG + powder) | 10% | 10.0 |
| Height & wind | 9% | 9.0 |
| Freight & install | 13% | 13.0 |
| Total | 100% | 100.0 |
This is a proportion model only — there is no price attached. If a quote comes in at, say, panels 60% and posts 10%, it is worth asking why the panel share is so high or the foundation share so low before you sign. The shape of the breakdown tells you as much as the total.
Because the quoted price per square metre is not one number but a stack of independent cost blocks: panel construction, posts and foundations, surface coating, height and wind-load engineering, plus freight and installation. Two quotes that look similar in panel price can differ sharply once posts, coating and logistics are included. Always ask for a line-item bill of materials so the comparison is like-for-like.
Not proportionally. Raising height increases panel area, but it also increases the wind load the whole system must resist, which drives up post size, foundation volume and sometimes the panel core mass. The marginal cost of the last metre of height is usually higher than the first, so total cost rises faster than the area alone.
Transparent polycarbonate or PMMA modules typically sit at the top of the panel cost range because of the raw sheet material and the engineering needed for impact and UV performance. Full-metal reflective panels are usually the leanest, with absorptive steel and composite panels in between. The final position depends on height, coating and local wind requirements.