Cyprus is entering the most dangerous stretch of the fire season again. In late July 2026, conditions primed for ignition — heat, dryness, wind — covered almost the entire island, while the EU pre-positioned a record number of firefighters and aircraft in high-risk zones, Cyprus among them. The stakes are fresh in memory: a year earlier, the fire near Limassol claimed two lives and destroyed around seven hundred structures. And that is the detail rarely discussed: the fire did not stop at the edge of the forest — it reached the buildings.
The fire doesn't stop at the tree line
When a fire front reaches built-up areas, buildings ignite not only from direct flame. Far more often, embers are to blame: wind lifts burning particles and carries them long distances; they settle on the roof, in the eaves, on the façade and smoulder — sometimes for hours — before flaring up. Add to this the radiant heat from a nearby flame, which heats materials to ignition temperature without any direct contact.
What matters most is where exactly ignition begins. According to building science, the building envelope rarely ignites in the middle of a smooth wall — fire finds the weak points at transitions: roof-to-wall junctions, eaves, overhangs, ventilation gaps. That's precisely where embers and combustible debris accumulate. The takeaway is simple: the fire safety of the building envelope is not a property of one material, but the behaviour of the whole system.
The building envelope as a system, not a set of details
External insulation is one of the layers of this system, and its combustibility determines a great deal. The specialists' recommendation is unambiguous: non-combustible cladding makes sense paired with non-combustible (or reliably protected) external insulation. Mineral insulation is named explicitly among the fire-resistant options. In practice, façade, roof and reveals must be considered together — the outcome is decided by the weakest link.
What makes a building envelope resilient to external fire:
- Non-combustible materials in all external layers, insulation included — not just the cladding.
- Special attention to transitions: roof-to-wall, eaves, overhangs, junctions — where most ignitions start.
- Protection against ember entry into gaps and cavities, where they can smoulder unnoticed.
- Materials that don't melt and don't drip burning molten matter when heated.
Where MULTIPOR fits in
MULTIPOR is a mineral insulation board made of cellular concrete: sand, lime, cement, water. No fibres, no synthetics. Under the European classification it is class A1 — the highest level: the material does not burn and does not emit toxic smoke. When heated it does not melt and does not form burning droplets that spread the fire further.
The contrast with familiar expanded polystyrene (EPS) is fundamental here. EPS is class E: it burns, melts, and releases toxic products when it burns. Even for a single-family home deep inside a built-up area this is an unacceptable risk — both to life and health and to property. And for apartment and public buildings, and especially for accessible flat roofs — the Cypriot architectural standard, where the roof becomes a terrace — non-combustibility of the envelope turns from a "bonus" into a requirement.
But what about mineral wool?
A fair question: mineral (rock) wool is non-combustible too. And that really is its strength — in terms of combustibility class it sits close to MULTIPOR and genuinely slows the rapid spread of fire across a façade. But there's a detail that shows up not in the lab, but precisely in a real fire — and it's tied not to the flame itself, but to putting it out.
Wool copes poorly with prolonged high temperature and, more importantly, with water. When firefighters pour tonnes of water onto a building, the fibrous insulation inside the façade system gets soaked, slumps, and loses its thermal properties. So even if the wool honestly "did its job" and kept the fire from spreading, the façade will very likely have to be opened up and replaced. In effect, it's single-use protection: you'll pay to replace the soaked, damaged façade just as you would with a foam-plastic one.
MULTIPOR works differently — it's mineral stone, not fibre. It doesn't soak up water like a sponge: it transports moisture by capillary action and then releases it, keeping its shape and thermal properties. So after the fire is put out, such a façade is far more likely to need no dismantling or replacement. The difference between "survived the fire and dried out" and "survived, but is written off for replacement" is already a matter of the owner's money.
Not just about fire: heat and durability
The fire class is not an isolated property, but part of the overall package of resilience to the Cypriot climate. The same mineral material that doesn't burn also doesn't lose its properties in the heat: polymer insulation loses its properties in Cyprus's hot climate, whereas MULTIPOR stays stable for the entire service life of the building. Its thermal mass smooths out daily swings and holds back summer overheating, while the low vapour resistance (μ=3) means the wall "breathes" and moisture doesn't get trapped in it. In other words, choosing A1 isn't a sacrifice for the sake of safety, but several benefits coinciding at once.
A case from practice: Limassol, July 2025
The forest fire near Limassol was a reminder that buildings at the interface of development and nature really do burn: around 700 structures destroyed, two dead, over 100 km² scorched. Against that backdrop, the outcome for projects with MULTIPOR façades is telling.
According to Multipor-Cyprus, not a single building with a MULTIPOR façade was damaged or required façade replacement — including those projects that ended up directly inside the burned-forest zone. Where embers and heat settled on the mineral envelope, there was nothing for them to ignite, and after the fire the façade did not have to be opened up and replaced.
A building's fire safety is complex work, not one lucky material. It begins at the design and risk-assessment stage, continues through material selection and quality workmanship, and doesn't end at handover — the building needs maintenance. In this chain, MULTIPOR is a very important, but precisely a part of the overall work. A non-combustible envelope removes one of the key ignition pathways and needs no replacement after the fire is put out, yet it realises its potential only when the whole system is properly designed and correctly installed.
The business takeaway
For the developer. In apartment and public buildings, as well as on accessible flat roofs, class A1 removes regulatory and reputational risks where combustible insulation simply doesn't meet the codes. It's not a "premium option," but a way to avoid reworking the project and answering for the consequences.
For the private buyer. If the house sits at the boundary with nature, a non-combustible envelope removes one real ignition pathway — on top of heat resistance and durability in the Cypriot climate. Here, MULTIPOR isn't advertising, but an engineering solution to a specific problem that the fire season highlights every summer.
Sources: Sigmalive (island-wide fire threat, 23.07.2026); European Civil Protection and Humanitarian Aid Operations (pre-positioning of 777 EU firefighters, 02.06.2026); Euronews (aftermath of the fire near Limassol, 2025); Building Science Corporation, BSI-129 "Wildfire"; Firestorm Building Products (envelope ignition pathways); MULTIPOR classification and composition — Xella / Multipor-Cyprus. The product's technical characteristics, the behaviour of mineral wool during firefighting, and the project outcomes following the 2025 fire are given per data and observations from Multipor-Cyprus.