
Horizontal storage tank — completed
Large horizontal tank sprayed in situ and finished with a UV-stable protective top coat. The jacket runs unbroken from end cap to end cap.
Insulate your process tanks in place. Enverge Nexseal LE closed-cell spray foam is applied straight onto the shell from £35/m² fully installed — seamless, self-bonded, no cladding rails and no vessel downtime for stripping.

Process plant around Sheffield loses heat through tank shells faster than almost anything else on site. Enverge Nexseal LE closed-cell spray foam is applied straight onto the vessel — a seamless, self-bonded jacket that follows every weld, nozzle and support without a single cladding rail.
Duratite specify, supply and supervise the whole job: measured heat-loss and surface-condensation assessment, the right thickness for the duty, application by Enverge-approved contractors across Sheffield and South Yorkshire, a UV-stable protective top coat over the foam, and a 25-year manufacturer-backed product warranty. We regularly survey and work on buildings around Tinsley, Don Valley, Templeborough.

Silos swing hard with the weather and sweat on the inside face. Closed-cell foam applied to the shell steadies the contents and stops surface condensation forming on cold steel — without any internal structure to catch product.
Traditional lagging solves an insulation problem by building a second structure around the vessel: rails, bands, sections, joints. Every joint is a heat path and a water path, and every fixing is a maintenance item. Spray foam adds only insulation — one seamless layer, bonded to the shell, with a protective coating over it. Where a demountable clad system is genuinely the right call, the survey report says so.
Sectional cladding that has failed at the joints, bands or flashings
Vessels sweating in cold duty, or losing heat faster than the plant can replace it
Nozzles, manways and supports that no cladding kit fits cleanly around
A re-clad quote that needs a shutdown you cannot schedule
Plant that cannot be taken offline long enough to strip and re-clad
Closed-cell Enverge Nexseal LE on tanks and vessels in Sheffield typically costs £35 to £75 per m² of shell area fully installed — one figure covering materials, application and the protective top coat. Access, vessel geometry and the duty temperature set where you land in the range.
| Complete system, fully installed | Typical installed price | Best suited to |
|---|---|---|
| Nexseal LE system with protective top coat | £35–£75 / m² installed | Tanks, vessels, silos and large-bore pipework insulated in situ |
| Where the lower end applies | from £35 / m² installed | Large, simple cylindrical shells with clear ground-level access |
| Where the upper end applies | toward £75 / m² installed | Complex geometry, elevated access, higher build-ups or heavier duty |
One system, one price. Every element below is part of the installed figure — none of them is ever priced separately.
Nexseal LE bonds to the shell itself, so there is no cavity between insulation and steel for moisture to sit in — which is where clad vessels usually start corroding out of sight.
Because there are no bands, rails or fixings, there is nothing to work loose in the wind or fail at a joint. The protective top coat takes the UV and the wash-downs, and the manufacturer stands behind the foam for 25 years.
Insulate process tanks, vessels and pipework across Sheffield manufacturing — Enverge Nexseal LE closed-cell spray foam bonds direct to steel and GRP, eliminates condensation drip onto product, reduces standing heat loss and protects against frost. 25-year manufacturer-backed product warranty.
The vessel stays where it is and normally stays in service. No dismantling, no crane, no re-clad shutdown — the foam is sprayed onto the shell in place.
One continuous layer over shell, welds, nozzles and supports. There are no sections to butt together, so there is no joint for heat or water to travel through.
Closed-cell foam is vapour-tight, so cold-duty vessels stop sweating and the steel underneath stays dry.
Enverge Nexseal LE, declared to BS EN 14315-1, with a 25-year manufacturer-backed product warranty on approved installs.
Four steps from first call to 25-year warranty. Most Sheffield sites are surveyed within 2–5 working days and sprayed in a single visit.
A measured walk-over of the vessels on your Sheffield site with shell condition checks, photographic record and heat-loss indication.
Same-week quotation with measured shell areas, the specified thickness for the duty, and the protective top coat included.
Nozzles, instruments and surroundings masked, then the foam is sprayed to the specified thickness and the top coat applied. Cured the same day.
Final inspection, handover documentation, and the 25-year manufacturer-backed product warranty issued.
Finished Enverge installations photographed after completion — the same specification process and the same approved contractor network we deploy in Sheffield.

Large horizontal tank sprayed in situ and finished with a UV-stable protective top coat. The jacket runs unbroken from end cap to end cap.

Vessel alongside a live plant building. Insulated and top-coated without moving the tank, breaking the pipework or emptying the contents.

Bulk storage next to process kit. The sprayed jacket follows the saddle supports and end profile exactly, where sectional cladding needs cut and packed sections.

This is what a sprayed jacket looks like before the protective top coat goes on: one continuous closed-cell layer, bonded directly to the vessel, with no cavity behind it for moisture to sit in.
Every photograph below is a finished installation, inspected and warranted — not a work in progress.

Insulated and coated in a tight space against a plant elevation. Spray reaches where a clad system could never be assembled.

Handed back on a live site. The finished coating takes the weather and the wash-downs while the foam underneath does the thermal work.

Circular silo shell insulated in one pass. The foam follows the curve and the ribs continuously, which no board or sectional system manages.
The honest comparison. Use it to shortlist — the free Sheffield survey confirms the right route for the duty.
| Factor | Sprayed Nexseal LE | Sectional cladding |
|---|---|---|
| Joints in the envelope | None | One at every section and band |
| Fit to geometry | Follows nozzles, welds and supports | Cut and packed around every obstruction |
| Cavity behind insulation | None — bonded to the shell | Yes, and it is where hidden corrosion starts |
| Installation | In situ, typically a single visit | Rail set-out, then section fitting over several visits |
| Maintenance items | Protective top coat only | Bands, fixings, sealed joints and flashings |
| Right when | The shell is sound and geometry is complex | Sections must be demountable for regular inspection |
Approved contractors cover every Sheffield postcode and the wider South Yorkshire region.
We work regularly across Sheffield’s major estates and business parks:
Outside one of these? We still cover all of Sheffield and the wider South Yorkshire region.
Free site surveys and installations across these postcode areas in and around Sheffield:
Somewhere else? Call 01208 832 602 — we cover the entire UK mainland and Northern Ireland.
Sector-specific specifications for the buildings Sheffield actually has:
Every sector page carries the same fully installed pricing and the same manufacturer-backed warranty.
Straight answers to the questions Sheffield plant and facilities managers ask us most.
Yes. Duratite covers all of Sheffield and the wider South Yorkshire area. Our manufacturer-trained Enverge-approved contractors are mobilised across the region for free site surveys and Nexseal LE spray foam tank, vessel and pipework insulation projects — commercial, industrial, agricultural and process plant.
For most Sheffield postcodes we attend within 2–5 working days of enquiry. Urgent surveys can be arranged within 48–72 hours. Each visit includes a measured walk-around, photographic record, thermal calculation indication and same-week written quote with no obligation.
For commercial tank, vessel and pipework work in Sheffield, Enverge Nexseal LE closed-cell spray foam typically ranges from £35 to £75 per m² supplied and installed, depending on tank size, access (working at height, confined spaces, pipework congestion), insulation thickness (25–100mm) and finish requirements (UV topcoat or aluminium foil cladding). Free site survey provides an exact figure with no obligation.
Yes — Enverge Nexseal LE's service temperature range covers most commercial process tanks across Sheffield. We run a thermal calculation per project to confirm the foam thickness and finish system suit your operating temperature, ambient conditions and required heat-loss reduction. For very high-temperature steam pipework or extreme cryogenic vessels we recommend traditional rigid sectional lagging instead — we'll tell you on the survey if spray foam isn't the right answer.
Yes. For external tanks across Sheffield we typically over-coat the cured Nexseal LE foam with a UV-stable elastomeric topcoat (silicone, urethane or acrylic) or finish with aluminium-foil pipework cladding. Over-coating is essential for any externally exposed installation — bare spray foam is not UV-stable. Internal-only installations don't need over-coating.
No — Enverge Nexseal LE has a neutral pH and provides an integral vapour barrier. The substrate stays dry under the foam, which actually prevents the corrosion-under-insulation (CUI) issues commonly seen with traditional rockwool / fibre lagging where moisture can become trapped against the steel. We always survey the substrate first — any active corrosion is treated with a primer before the foam is applied.
Usually no. Enverge Nexseal LE is applied to the external surface of the tank — most Sheffield tanks and vessels remain in service throughout the install. For very hot tanks (above the foam's spray-application temperature limit) we may schedule the install during a planned shutdown window. We confirm logistics on the free site survey.
Yes. All Sheffield tank insulation works are carried out by Enverge-approved spray-foam contractors with manufacturer training, full public-liability insurance, working-at-height accreditation, confined-space competency where required, CSCS-qualified operatives and gas-monitoring/PPE protocols. The 25-year manufacturer-backed product warranty is only valid when installation is completed by approved applicators.
We regularly work across Tinsley, Don Valley, Templeborough, Sheffield Business Park — and every other commercial estate in and around Sheffield. If your building sits outside these areas we still cover all of South Yorkshire; call 01208 832 602 to confirm your postcode.
Yes. The same approved contractor network that covers Sheffield works across the whole of South Yorkshire, including Rotherham, Doncaster, Mansfield. One survey team, one specification, one 25-year manufacturer-backed product warranty — wherever the building is.
Installation is carried out by Enverge-approved spray-foam contractors with manufacturer training, full public liability insurance, CSCS-qualified operatives and gas-monitoring and PPE protocols. The products are supplied by Duratite Building Products Limited, and the 25-year product warranty is manufacturer-backed on Enverge Nexseal LE — whose thermal performance is declared to BS EN 14315-1 — and valid only when an approved applicator completes the install, which is exactly how every Duratite-managed project runs.
The national hub — vessel types, thicknesses and every city we cover.
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Read more →Send your vessel details and a few photos. We confirm the right thickness for the duty and book your free Sheffield site survey.
Tell us about your building and we’ll recommend the right system — foam, waterproofing or both — surveyed, specified and quoted at no cost.