Notably, the materials that recorded the largest price increases between 2024 and 2025 differ from those that saw the most significant rises over the longer period from 2021 to 2025.
Over this timeframe, thermal and acoustic insulating materials experienced the largest cumulative increase, rising by 51.3%, while steel products, including reinforcing bars and fabricated structural steel, continued to show downward trends.
This shift is important in the context of current geopolitical tensions. It suggests that recent price movements have become more material-specific and less closely tied to the energy-related cost pressures that drove earlier increases. As a result, any longer-term disruption to energy markets arising from the Middle East conflict could alter this pattern, potentially reintroducing broader, more synchronised price pressures across construction materials.
Monthly PPI data for 2025 provide further insight into near-term movements. Across many core construction materials, monthly price changes generally ranged between a 2% increase and 2% decrease last year, although there were periods of more pronounced movement.
For example, structural materials prices showed a mid-year softening. Fabricated structural steel prices fell by 4.0% in June and by a further 2.0% in July. Concrete reinforcing steel bars also recorded consecutive monthly declines through the summer, including a 3.6% fall in June.
Alongside slower growth in some aggregate indices towards the end of the year, this mid-year easing points to weaker construction demand, consistent with industry sentiment surveys and more subdued new work output data published in late 2025. A softer demand backdrop, combined with emerging economic risks, may reduce clients’ willingness to commit to new projects.
A new joint statement(4) from John Newcomb, CEO of the Builders Merchants Federation (BMF), and Peter Caplehorn, CEO of the Construction Products Association (CPA), provides useful context. They suggest the conflict in the Middle East is unlikely to significantly affect the availability of products and materials in the UK, as these are largely produced domestically or sourced from Europe.
However, pricing remains a greater concern. Transport costs are reportedly becoming more unpredictable, and within the mechanical engineering sector, the prices of copper and steel are of particular note, consistent with findings from the latest BCIS Civil Engineering Tender Price Index Panel. The key risk is that rising materials costs will be passed on to SMEs, increasing their exposure to financial pressure and potentially insolvency.
The outlook therefore remains uncertain. Much will depend on how geopolitical tensions evolve, how long they persist and the extent to which they disrupt energy markets, although some level of disruption now appears inevitable.
Global factors will also play a role. Energy shortages are being felt more acutely in Asia, which are more reliant on Middle Eastern oil and gas. According to the BMF and CPA statement, this is now feeding through into prices, with some imported goods prices increasing by as much as 100% or more in certain cases.
With the conflict now ongoing for over a month, a higher cost base for materials may already be the new normal.
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