Insulate curved Quonset and arch-roof buildings the only practical way — spray foam bonds to the arch and seals condensation out in one pass.
Quonset huts — the American prefabricated arch-roof buildings stamped from corrugated steel — are widely used across the UK and beyond as industrial stores, workshops, warehousing and agricultural sheds. Their lightweight curved single skin gives almost no thermal resistance, so the buildings swing with the weather and shed condensation off the steel onto stock, machinery and floors below.
Enverge closed-cell spray foam self-bonds to the inside of the curved corrugated shell as it cures, sweeping along the arch in one continuous insulating layer. It needs no battens, fabric or fixings to hold it to the curve, and because it is closed-cell it resists moisture and keeps the steel above dew point — stopping the condensation that otherwise rains down inside these arch buildings.
Treated this way, a Quonset hut becomes a dry, thermally stable industrial or storage space that holds temperature and protects what's kept inside. The seamless coating also air-seals and stiffens the lightweight shell, so a basic prefab arch performs like a properly insulated commercial building fit for year-round working use.
Suits Quonset arches used as warehousing, workshops and industrial stores needing year-round performance.
Keeps the curved corrugated steel above dew point so condensation stops raining onto stock and floors.
Self-bonds continuously along the curved roof with no battens, fabric or mechanical fixings.
Creates a dry, temperature-stable interior that safeguards machinery, stock and palletised storage.
Buffers the thin prefab steel against rapid heating and cooling for a more workable interior.
Air-seals and adds rigidity to the lightweight arch while insulating it in one operation.
Closed-cell foam follows the arched, corrugated roof exactly for a complete, sealed, insulated finish.
Enverge closed-cell spray foam (Nexseal LE) is sprayed onto the inner curved corrugated shell of the Quonset hut, self-bonding and expanding to follow the arch as it cures. The continuous, low-absorption closed-cell layer insulates, air-seals and holds the steel above dew point in a single pass, eliminating the condensation that affects uninsulated prefab arch buildings.
Typical published values for Enverge Nexseal LE closed-cell foam. Full technical specification →
Curved, corrugated structures — Nissen huts, Quonset huts, grain silos — defeat rigid insulation entirely: boards can't follow the arch and battening destroys the interior. Sprayed closed-cell foam follows the curve exactly, bonding to every corrugation with zero penetrations of the original sheet.
A 15–25 mm coat protects stored contents from condensation; 50–80 mm brings the structure up to habitable, workable comfort. The cured foam also stiffens thinned, ageing steel — often the difference between demolishing a structure and giving it another working generation. Most are completed in 1–3 days.
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Its single-skin steel arch chills quickly, so warm interior air hits cold metal and condenses, dripping onto whatever is stored below. Insulating the inner shell with closed-cell foam keeps the steel above dew point and stops that condensation forming.
Yes. Industrial and storage use is a core application. The seamless coating gives a dry, temperature-stable interior that protects stock, machinery and palletised goods, turning a basic prefab arch into a properly performing commercial building.
The principle is similar — both are curved corrugated arches — but Quonset huts are usually American-pattern prefabs in industrial and storage use, whereas Nissen huts are British military-heritage structures. We tailor the approach to each building's construction and use.
Yes. It's sprayed as a liquid that self-bonds to the steel and expands in place, gripping the curve and corrugations directly. No battens, fabric or fixings are needed to hold it to the arch.
Typically yes. We scale the works to the building and plan around your operation, applying the continuous coating across the full arch so the whole structure benefits from one seamless insulating and air-sealing layer.
Yes — that's exactly what spray foam is for. It bonds to the curve directly with no battens, framework or fixings.
The cured foam adds meaningful rigidity to ageing corrugated sheets, extending the working life of the structure.
15–25 mm to protect contents from condensation, or 50–80 mm where the space is being brought into regular use.
Specialist commercial spray foam, installed UK-wide by the Duratite Group's spray foam specialists.
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