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NATIONWIDE COVERAGE
25 YEARS GUARANTEE
CERTIFIED SPECIALIST
FREE QUOTES

Cementitious Spray Fire Protection

FIRAS, BM TRADA & IFC accredited sprayed fire protection contractor and approved applicator of GCP Monokote and Nullifire Perlifoc HP Eco+. Cementitious spray gives up to 240 minutes fire resistance to structural steel, concrete soffits, composite decks and hollow-pot floors, faster and cheaper than intumescent paint or boarding. Free site survey and itemised quote within 24 hours. London, Milton Keynes and nationwide.
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The most cost-effective fire protection for structural steel and concrete. One spray-applied system with no primer, no topcoat and no boarding: typically the lowest installed cost per m² on large steel frames, concrete soffits and car parks.

Key benefits:
▪︎ Up to 240 minutes fire resistance: slabs and walls to REI 240, beams and columns to R120
▪︎ Systems tested and assessed to BS EN 13381-3 (concrete) and BS EN 13381-4 (steel)
▪︎ Approved applicators of GCP Monokote and Nullifire Perlifoc HP Eco+
▪︎ Non-hazardous, asbestos-free gypsum and cement mortars for internal and external use
▪︎ Fast application that follows every contour and fills hard-to-reach gaps
▪︎ Durable, impact-resistant finish with a long service life, paintable where required
▪︎ FIRAS, BM TRADA and IFC accredited installation with certification on completion
Cementitious Spraying - Fire Protection to Structural Steel and Concrete
ALERON Fire Protection offer fire protection systems to the fire resistance of structural concrete members, for instance slabs, floors, roofs and walls and which can include integral beams and columns.

Cementitious Spray Fire Protection for Steel and Concrete

Approved Monokote and Perlifoc applicators. Up to 240 minutes fire resistance, fast application, the lowest installed cost per m².
Get a free site survey and itemised quote
Tell us the building, the elements to protect (steel beams and columns, concrete soffits, slabs, decks) and the fire rating required. Our FIRAS-accredited team replies within 24 hours with a no-obligation quotation.
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Sprayed Fire Protection to Structural Steel

Beams, columns, cellular beams, trusses and metal decks: 30 to 240 minutes fire resistance

Cementitious spray is the fastest way to bring structural steelwork up to the fire resistance the building requires. Our teams pump and spray GCP Monokote or Nullifire Perlifoc HP Eco+ directly onto the steel, building the thickness the section factor demands in a single visit. There is no primer or topcoat cycle, no boarding and no waiting for coats to cure, which is why sprayed fire protection is usually the lowest installed cost per square metre on large frames.

Thicknesses are taken from the manufacturers’ assessed tables to BS EN 13381-4 and checked on site with a depth gauge, so every beam and column meets its rating and a certificate of conformity is issued on completion.

Typical projects: commercial offices and retail fit-outs, warehouses and industrial units, car parks, plant rooms and boiler houses, refurbishment of existing frames, and concealed steelwork in residential and mixed-use blocks. Where the finish is hidden above ceilings or in service areas, cementitious spray is normally the most economical choice; where steel is on show, we can advise on intumescent coatings instead.
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Concrete Soffit and Slab Fire Protection
Upgrade car parks, basements, hollow-pot and ribbed floors to REI 240

Many older concrete frames no longer meet the fire resistance the building now requires: clay hollow-pot floors, ribbed and waffle slabs, and thin soffits with low cover to the reinforcement are the usual culprits. A sprayed cementitious layer applied to the underside of the slab restores the rating without demolition or loss of headroom. Slabs and walls can be taken up to REI 240 and beams and columns to R120, with thicknesses assessed in accordance with BS EN 13381-3 (applied protection to concrete members).

The finish is robust enough for car parks and service areas, resists impact and abrasion, and can be left textured or painted. Application is fast, so occupied buildings are treated floor by floor with minimal disruption, and the same system protects composite metal decks and the steel that supports them.

We survey the soffit, confirm the existing construction and cover, and specify the thickness for the required period before we quote, so the price you receive is the price you pay.
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Monokote Fireproofing Contractors
Approved applicators of GCP Monokote MK-6/HY, Z-106 and Z-146 cementitious fireproofing

Monokote is the gypsum-based sprayed fireproofing behind many of the UK’s tallest and most demanding buildings, and ALERON is an approved Monokote applicator. Monokote MK-6/HY is the standard commercial grade for structural steel and metal decks, Z-106/HY adds density and durability for exposed or high-traffic areas, and Z-146 is the high-density grade for car parks, plant rooms and other locations where impact and abrasion resistance matter.

Monokote is pumped and spray-applied in a single visit, sets fast, bonds tightly to steel and concrete, and provides up to four hours fire resistance to columns, beams, cellular beams, trusses and composite floor decks. The finish is non-combustible, asbestos-free and can be left textured or painted to any RAL colour where an aesthetic finish is required.

If your specification or fire strategy names Monokote, or you need a like-for-like alternative to an existing Monokote installation, send us the drawings and the fire rating required and we will price the job within 24 hours.
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Perlifoc HP Eco+ Contractors
Approved applicators of Nullifire Perlifoc HP Eco+ gypsum-based sprayed fire protection

Perlifoc HP Eco+ from Nullifire (Tremco CPG) is a lightweight gypsum, perlite and vermiculite fire protection mortar for structural steel, concrete soffits, composite steel-concrete decks and clay hollow-pot floors. It is assessed to BS EN 13381-3 and BS EN 13381-4 for up to 240 minutes fire resistance, and its high-performance formulation means thinner coats and faster coverage than conventional cementitious sprays, so large soffits and steel frames are protected in fewer visits.

Perlifoc HP Eco+ is formulated with low-emission raw materials and carries an Environmental Product Declaration, which makes it the usual choice on projects with BREEAM or embodied-carbon targets. The finish is non-combustible, asbestos-free, offers useful thermal and acoustic insulation, and can be smoothed or painted without affecting its fire performance.

ALERON is an approved Perlifoc applicator with FIRAS, BM TRADA and IFC accreditation. Send us the drawings, the elements to be protected and the fire rating required and we will confirm thicknesses and price within 24 hours.
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Cementitious Spray, Vermiculite, Intumescent Paint or Boarding?
Every structural fire protection method does the same job, insulating the steel or concrete so it keeps its strength for the required period, but they differ sharply in cost, speed and appearance. This is how we advise clients:

Cementitious and vermiculite spray (Monokote, Perlifoc HP Eco+ and similar) is the lowest installed cost per square metre and the fastest on large areas. It is the right answer for concealed steel above ceilings, car parks, basements, plant rooms, warehouses, soffits and composite decks, and for upgrading existing concrete floors. It gives up to 240 minutes fire resistance and a durable, impact-resistant finish. It is not the answer where architectural steel must stay slim and smooth.

Intumescent paint keeps the profile of exposed steel and can be finished in any colour, but it needs a compatible primer, multiple coats, controlled drying and careful film-thickness checks, so it is slower and dearer per square metre. We install intumescent coatings too, and recommend them for visible steel.

Fire boarding and encasement gives a flat, boxed finish and suits columns in finished rooms, but it is labour-intensive, adds bulk and struggles with complex connections and services.

On most projects the economical solution is a mix: spray where it is hidden, paint or board where it is seen. Send us the drawings and we will propose the split, the fire ratings and a single itemised price.
ALERON has over 14 years of Experience
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