Metal Carved Panels: Cost Drivers, Installation Efficiency and Retrofit Value

A specification guide for developers and contractors working on villa, resort and renovation projects.

What the panel actually is

A metal carved panel — also traded as an insulated metal wall panel (IMP) — is a three-layer composite: an aluminium-zinc coated steel face that is roll-embossed with a brick, stone or wood relief; a rigid polyurethane (PU) foam core; and an aluminium foil backing. The three layers are laminated in one continuous process, which is why the panel reaches site as a finished facade element rather than as a substrate that still needs plastering and painting.

Standard export specification is 4,000 × 383 × 16 mm, or 1.53 m² per panel, at 3.7 kg/m². Cover width is 383 mm; the 415 mm blank width includes the interlocking edge. Panel thicknesses are 10, 16, 20 and 25 mm. Face steel is quoted on measured gauge — 0.21, 0.23, 0.25, 0.27 or 0.30 mm — and it is the measured figure, not a nominal one, that the price is built on.

Where the cost sits

Five variables decide what a panel costs, and they do not carry equal weight.

Thickness also buys thermal performance, which is where the cost is recovered. Measured thermal conductivity is 0.022 W/(m·K) at 10 °C and 0.024 W/(m·K) at 25 °C (GB/T 10295-2008), with a system heat transfer coefficient of 1.50 W/(m²·K) (GB/T 13475-2008). Expressed as an equivalence, 10 mm of PU foam core delivers the insulation of about 16 mm of EPS, 18 mm of mineral wool, 152 mm of lightweight concrete or 344 mm of brickwork. Water absorption measures 0.81% against a 3% requirement, and sound reduction is 26 dB or better.

A thinner panel on a mild-climate project and a thicker panel in a high-cooling-load market are both defensible specifications. What is not defensible is choosing a panel on price alone without knowing which of the two variables above was reduced to reach it.

Installation: the saving is in labour

The panel fixes directly to sound masonry, rendered or concrete walls using a U-shaped starter track, self-drilling screws and a full accessory set. There are no wet trades, so there is no curing time, no water on site and no weather window to wait for; the factory's own comparison puts the installation range at approximately −10 °C and above, where mortar work would stop.

Where the building is steel-framed, or where the wall is being insulated at the same time, a dry-hang frame is used instead — C-section main rails at centres of 1,200 mm or less, with U-section secondary rails at 380 mm centres.

The labour difference is the commercial argument. On the same 100 m² of wall, metal carved panels are put up in 3–5 days by a two-person crew, against 10–15 days by four people for ceramic tiling — a labour reduction of roughly 40%. At 5.7 kg per panel, handling is a one-person operation and low-rise work needs no lifting equipment.

Retrofit without demolition

On sound existing render, concrete or masonry, panels are fixed straight over the old facade. Nothing is demolished, no debris is removed from site, and occupants can usually stay in place while the elevation is upgraded — which is the main reason over-cladding has become the default approach for ageing residential and resort buildings that need a presentable, better-insulated envelope without structural work.

There are two exclusions, and they matter more than the sales pitch. Friable or chalky substrates, unreinforced autoclaved aerated concrete block, and walls with extensive hollow or delaminated areas are not suitable for direct fixing. Where the substrate is questionable, a framed system is the correct answer, not a longer screw.

Fire performance and documentation

The rigid PU core is classified B1 to GB 8624. The classification is supported by a test report from a CNAS/CMA-accredited laboratory — CTICM2102162526523ABR, issued 23 June 2024 — which covers combustion performance together with thermal conductivity, water absorption, peel strength, tensile strength and weathering resistance (salt spray, alkali and humidity).

The production base holds ISO management system certification for quality, environment, and occupational health and safety, issued under CNAS/IAF accreditation.

Markets with their own mandatory schemes are handled separately and should be raised at enquiry stage: CE marking under CPR 305/2011 for the European Union, ASTM E84 or UL 723 for North America, SASO/SABER for Saudi Arabia, EAC for the EAEU. Confirming the applicable scheme before order lets the required testing and documentation be scoped and scheduled rather than discovered at the port.

What to check before appointing a supplier

• Measured steel gauge — ask for the calliper figure, and whether it can be verified on arrival. Gauge substitution is the most common way a low quotation is built.

• Fixed colour codes — a card with stable codes, plus a batch policy that keeps one project on a single production run. Mixed batches are where colour complaints start.

• A complete accessory range from the same production run — starter track, internal and external corners, joint cover, window and door trim. Mismatched trim is a visible defect.

• The test report itself, not the claim on a sales page — check the report number, the laboratory's accreditation and the standard cited.

• Whether thickness, length and core options can be mixed within one order, and what that does to the delivery schedule.

Quotation basis

Panels are quoted ex-works from the production base in Zouping, Shandong, or FOB Qingdao. Packaging — 10 panels per carton, 4,000 × 415 × 135 mm — is included in the unit price. Minimum order is 500 m², and production for one container is 15 days. Steel and MDI prices move, so quotations are issued with a fixed validity window.

About Shandong Homton Supply Chain Management Co., Ltd. Shandong Homton works with a dedicated metal carved panel production base in Shandong, and handles sourcing, quality documentation, order consolidation and export shipping for buyers in Southeast Asia, the Middle East and other markets.

For current pricing, samples and the full colour card, contact us freely.