Home›Grain Silo Insulation
Grain store protection & silo-to-home conversions with Nexseal LE closed-cell spray foam. The foam — performance declared to BS EN 14315-1 — bonds directly to curved corrugated steel walls and roofs — following the cylindrical profile perfectly to create a seamless thermal barrier, vapour control layer and anti-condensation coating in a single application.
Nexseal LE is the ideal insulation system for grain silos. This closed-cell spray foam — performance declared to BS EN 14315-1 — bonds directly to the curved corrugated steel walls and roof — following the cylindrical profile perfectly to create a seamless thermal barrier, vapour control layer and anti-condensation coating in a single application.
With a lambda value of 0.027 W/m·K, Nexseal LE delivers maximum thermal performance at minimal thickness. For grain stores, a thin 15–25mm coat eliminates condensation. For silo conversions, 50–80mm+ between timber studs achieves TGD L compliance.
Protecting stored grain: condensation on uninsulated steel causes grain caking, mould growth and mycotoxin development — directly reducing the value and safety of stored grain. By raising the internal surface temperature above the dew point and stabilising the overall silo temperature, the foam prevents moisture from ever reaching the grain — reducing spoilage, quality downgrading and re-drying costs, permanently.
The right spray foam specification depends entirely on what the silo is used for. Active grain stores need a thin condensation-control coat. Silo conversions need thicker insulation with stud framing for habitable, year-round use.
Grain store protection (15–25mm): a thin coat of Nexseal LE sprayed directly onto bare corrugated steel. Controls condensation, stabilises temperature for stored grain, prevents moisture migration and protects grain quality. The corrugated profile remains visible.
Silo conversion insulation (50–80mm+): timber studs fixed to the silo walls, with Nexseal LE sprayed between and over them for a continuous thermal envelope. TGD L compliant for habitable use, plasterboard-ready for silo homes, offices, studios and holiday lets.
Active grain store?Grain store protection (15–25mm) — eliminates condensation and stabilises temperature for stored grain.
Silo conversion?Full conversion insulation (50–80mm+) with studs — Part L compliant for year-round habitable use.
Bonds to curved steelFoam expands to fill every ridge and trough of the corrugated steel — no gaps, no cutting, no fitting around curves.
Rapid installationA standard silo sprayed in 1–2 days; conversions with studwork 2–3 days. Minimal disruption to farm operations.
Uninsulated corrugated steel silos suffer from condensation, temperature swings and moisture damage. Here’s how spray foam solves every aspect of the problem.
Corrugated steel silos suffer condensation when warm moist air meets cold steel. This drips onto stored grain, causing caking, mould growth and mycotoxin contamination.
Uninsulated steel heats up rapidly in sun and cools fast overnight. These daily swings cause grain sweating and moisture migration through the stored grain mass.
Spray foam stabilises temperature and eliminates condensation, protecting grain value. A stable, dry environment prevents spoilage and reduces drying costs.
Silo conversions need proper insulation to be habitable year-round. Without it, converted silos are unbearably hot in summer and freezing in winter.
Spray foam follows curved walls perfectly, unlike rigid board which cannot conform to cylindrical shapes. No gaps, no cold spots, no hidden condensation.
For converted silos, proper insulation dramatically reduces heating costs. The cylindrical shape has a favourable surface-to-volume ratio — spray foam maximises it.
Converting decommissioned grain silos into unique living spaces is a growing architectural trend across Ireland and Northern Ireland. The cylindrical shape and often conical roof create striking, characterful interiors that stand out as homes, holiday lets, offices and creative studios.
Nexseal LE sprayed between timber studs creates the thermal envelope needed to make these structures habitable year-round. The closed-cell foam fills every void around the stud framing, eliminating thermal bridging and cold spots — a plasterboard-ready surface with Building Regulations-compliant thermal performance.
Free technical advice · info@duratite.ie
Rigid board cannot conform to curved walls. Fibreglass batts leave gaps and absorb moisture. Only spray foam creates a continuous, bonded thermal barrier on cylindrical corrugated steel structures — specified two ways.
| Feature | Grain Store Protection | Silo Conversion Insulation |
|---|---|---|
| Product | Nexseal LE Closed-Cell | Nexseal LE Closed-Cell |
| Thickness | 15–25mm | 50–80mm+ |
| Timber Studs | Not required | Yes — stud framework installed |
| Plasterboard Ready | No — corrugated profile visible | Yes — flat surface for boarding |
| Condensation Eliminated | Yes | Yes |
| Vapour Barrier | Integral | Integral |
| Best For | Active grain stores, feed storage, agricultural bins | Silo homes, holiday lets, offices, studios |
| Typical Install Time | 1–2 days | 2–3 days |
| Year-Round Occupancy | Not designed for heated use | Full thermal comfort |
| TGD L Compliant | N/A — agricultural use | Building Regulations compliant |
| Declared values (BS EN 14315-1) | Yes | Yes |
A straightforward four-step process, planned around farm operations.
We assess your grain silo’s condition, intended use and access requirements. This determines whether you need a grain store protection coat or full conversion specification.
We specify the Nexseal LE thickness, any stud framework needed and provide a fixed-price quotation. No hidden charges, no surprises.
Enverge-trained applicators spray Nexseal LE directly to the curved corrugated steel. Foam follows the cylindrical profile perfectly. Conversions get studs fitted first.
You receive thickness verification, product datasheets and warranty documentation. Conversions are left plasterboard-ready for your fit-out team.
Trusted spray foam insulation specialists — delivering expert installations for grain silos nationwide.
Duratite has delivered professional spray foam insulation projects including grain silo installations since 2015 and now supports projects across Ireland and Northern Ireland.
Commercial projects across Ireland and Northern Ireland including grain silos, warehouses, hangars and agricultural structures of every type.
Our approved installer network is directly trained and certified by Enverge to ensure every installation meets manufacturer specifications.
We understand both sides — thin anti-condensation coats for grain stores and full thermal insulation for silo conversions.
Nexseal LE performance is declared to BS EN 14315-1 — backed by a 25-year manufacturer product warranty.
Extensive experience with agricultural structures. We understand the specific requirements of grain stores, feed silos and farm buildings.
Independently certified products — all documentation supplied with your project pack or on request. Email info@duratite.ie.
Distribution centres, cold storage, industrial units. Same Nexseal LE system for metal-clad buildings.
Learn more →AviationAircraft hangars, maintenance bays, large-span steel structures. Corrugated metal and asbestos cement roofs.
Learn more →AgricultureLivestock buildings, poultry houses, barns. Condensation and temperature control for farm structures.
Learn more →RoofingMetal profile roofing on industrial, commercial and agricultural buildings. Spray foam under corrugated sheets.
Learn more →Curved SteelCurved corrugated steel structures insulated with the same bonded spray foam system.
Learn more →HubExplore all commercial spray foam insulation applications, systems and sectors.
Learn more →Book a free assessment and get expert advice on the best spray foam solution for your silo — or call us directly on info@duratite.ie.
Fixed-price quotation for grain store protection or full conversion specification.
Mon–Fri 8am–5pm · info@duratite.ie
Tell us about your building and we’ll recommend the right system — foam, waterproofing or both — surveyed, specified and quoted at no cost.
