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Spray-applied closed-cell foam to the underside of suspended slabs and metal soffits. Eliminates thermal bridging on exposed concrete, stops surface condensation, meets Euroclass B-s2-d0 fire performance and TGD L (Technical Booklet F2 in Northern Ireland). Specified by main contractors, FMs, architects and surveyors Ireland-wide.
Nexseal LE is the core product for professional soffit insulation. This closed-cell spray foam — performance declared to BS EN 14315-1 — delivers exceptional thermal performance with a lambda value of 0.027 W/m·K — the lowest in its class.
Crucially, Nexseal LE features a low exothermic reaction — generating significantly less heat during application than competitor foams. For overhead soffit applications in confined spaces, this is not just a benefit, it is essential: it reduces the risk of scorching, shrinkage or damage to metal and fibre cement substrates, creates a safer working environment for technicians spraying overhead, and promotes stronger adhesion and a more consistent cell structure in overhead curing.
Why thermal bridging is a soffit-specific problem: exposed concrete soffits and metal deck soffits act as cold bridges. A multi-storey car park, undercroft or open-deck industrial unit can lose 15–25% of upper-floor heat through the soffit alone if untreated. Cold-side surface temperatures drop below the dew point, forming condensation, drips and — over time — corrosion of rebar and steel deck. Spray-applied closed-cell foam creates a continuous airtight insulation layer directly bonded to the substrate: no fixings, no boards, no joints — no path for thermal bridging, no gaps at column-to-slab junctions, no condensation behind a sealed surface.
Concrete soffits in car parks, undercrofts and multi-storey buildings suffer from condensation, cold bridging and poor thermal performance. Nexseal LE bonds directly to poured concrete, providing a seamless insulation layer.
No fixings or framing required — seamless application around beams, services and penetrations that rigid board cannot match.
Raises cold concrete surfaces above the dew point — no more drips onto vehicles, stock or public areas, and no ice formation in car parks.
Fire-rated for occupied spaces — ideal for TGD L and TGD B compliant retrofits.
The DC315 topcoat provides a hard, clean, white surface suitable for public-facing car parks and retail areas.
The thermal break required by TGD L — U-value target confirmed by calculation for your building — delivered seamlessly.
The most demanding application: stringent fire requirements met by the Nexseal LE + DC315 system, with condensation and ice eliminated.
Metal deck soffits — including Metsec profile decking, composite steel-concrete floors and steel ceiling systems — require a specialist approach. Duratite uses a proven hybrid spray foam system that combines the vapour-barrier properties of Nexseal LE with the thermal and acoustic performance of Sucraseal open-cell foam.
Nexseal LE combined with DC315 intumescent coating delivers Euroclass B-s2-d0 under EN 13501-1. In a fire event the DC315 expands to form a protective char layer, significantly limiting flame spread and smoke production.
Uncoated Nexseal LE: Class 1 / Euroclass E — suitable for general industrial areas and non-occupied soffit zones.
With DC315: limited combustibility under EN 13501-1, with a hard, clean, white finish for exposed and visible use.
Full certification pack for Part B compliance — accepted by building control officers and fire consultants nationwide.
Occupied offices within industrial units, mezzanine floors, escape route protection, TGD L & TGD B compliant retrofits.
Which spray foam system is right for your soffit application? Here is how closed-cell and open-cell compare across the metrics that matter for overhead work.
| Feature | Enverge Nexseal® LE (Closed Cell) | Enverge Sucraseal® (Open Cell) |
|---|---|---|
| Cell Structure | Closed — rigid, high density | Open — soft, flexible |
| Lambda Value | 0.027 W/m·K | 0.039 W/m·K |
| Vapour Barrier | Yes — integral (Class 1) | No — vapour open |
| Fire Rating (Uncoated) | BS 476 Part 7 Class 1 / Euroclass E | Euroclass E |
| Fire Rating (With DC315) | Euroclass B-s2-d0 | Class 1 achievable |
| Soffit Suitability | Ideal — low exothermic, overhead bond | Limited — no structural bond |
| Substrate Adhesion | Excellent — concrete, steel, aluminium, fibre cement | Good — but no structural reinforcement |
| Exposed Use | DC315 gives hard white finish | Requires covering |
| Recommended For | Soffits, fire-rated areas, concrete & metal soffits, corrugated roofs | Internal partitions, acoustic applications |
| Hybrid System | Vapour-barrier base layer (25–50mm) | Thermal & acoustic bulk + separate VCL |
Free site assessment, engineered design, professional installation, full documentation.
We survey your building — inspect the soffit, roof condition, substrate type, access requirements and operational constraints. Free and no-obligation.
Proposed thicknesses, fire specification (Euroclass B where required), substrate compatibility, U-value calculations and fixed-price quotation.
Spray-applied by manufacturer-trained technicians. DC315 intumescent coating added where Euroclass B is specified. Most projects completed in 1–3 days.
Thickness logs, photographs, Euroclass B fire certificates, DC315 certification, warranty documentation — everything needed for building control.
Delivered by our approved installer network — including critical national infrastructure and main-contractor supply chains.
Euroclass B-s2-d0 specification for an exposed soffit above occupied retail units. 50mm Nexseal LE with DC315 intumescent coating applied to the concrete soffit. Building control sign-off achieved on first inspection.
Severe condensation dripping onto machinery from a single-skin corrugated steel soffit. 25mm Nexseal LE applied overhead — condensation eliminated within 24 hours, with no disruption to the production schedule.
Exposed concrete soffit above ground-floor retail requiring thermal upgrade and condensation prevention. 40mm Nexseal LE with DC315 coating for Euroclass B compliance — clean white finish for public-facing areas.
Critical-infrastructure undercroft sprayed with Nexseal LE and finished with DC315 intumescent coating in ice grey.
Large-scale exposed concrete soffit treated with Nexseal LE — applied for a flagship cultural building in Plymouth, England.
Every commercial soffit job is bespoke — final pricing depends on substrate, access, fire-rating spec and thickness required for your target U-value.
| Project type | Typical area | Pricing | Lead time |
|---|---|---|---|
| Small mezzanine / single industrial soffit bay | 200–500 m² | Fixed price after survey | 2–3 weeks |
| Multi-storey car park (single deck) | 1,000–2,500 m² | Fixed price after survey | 3–5 weeks |
| Podium deck / undercroft (residential block) | 500–1,500 m² | Fixed price after survey | 3–4 weeks |
| Distribution centre / large factory soffit | 3,000–10,000 m² | Fixed price after survey | 4–8 weeks |
Trusted soffit insulation specialists — delivering Euroclass B fire rated spray foam systems for industrial buildings nationwide.
Duratite has delivered professional soffit and spray foam insulation projects since 2015 and now supports projects across Ireland and Northern Ireland.
Commercial projects across Ireland and Northern Ireland including industrial units, warehouses, agricultural buildings and commercial structures.
Our approved installer network is directly trained and certified by Enverge to ensure every installation meets manufacturer specifications.
From initial survey through to completion and handover — we manage every aspect of your soffit insulation project.
Enverge Nexseal LE performance is declared to BS EN 14315-1 and independently tested.
Certified Euroclass B-s2-d0 spray foam systems with DC315 intumescent coating for fire-rated soffit applications.
Independently certified products — all documentation supplied with your project pack or on request. Email info@duratite.ie.
NCP, hospital, retail and council multi-storey car park decks — Nexseal LE + DC315, declared to BS EN 14315-1.
Learn more →Sub-PageFactories, warehouses, distribution centres, mezzanines, Metsec and corrugated decks.
Learn more →Sub-PageOffices, retail, schools, hospitals — Euroclass B-s2-d0 + U-value targeted, BS EN 14315-1 declared values.
Learn more →CommercialCut energy costs and stop condensation in warehouses and distribution centres.
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Learn more →Book a free site survey and get expert advice on the best spray foam system for your soffit — detailed cost and specification back within 5 working days, no obligation. Or email us directly at info@duratite.ie.
U-value calculations, condensation risk analysis and fire specification included.
Mon–Fri 8am–5pm · info@duratite.ie
Real Duratite projects — building type, location, system used and the outcome on site.
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Mustique, CaribbeanLuxury VillaTell us about your building and we’ll recommend the right system — foam, waterproofing or both — surveyed, specified and quoted at no cost.
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