Shipping Container Spray Foam Insulation
Turn steel containers into usable, condensation-free space — spray foam bonds to the ribbed steel and seals out 'container rain'. Installed UK-wide.
Why spray foam for shipping containers
Shipping containers are sealed steel boxes that swing wildly in temperature. Warm interior air hits cold corrugated steel and condenses, producing the notorious "container rain" that drips onto stored goods, equipment and machinery. Left untreated, that moisture corrodes the steel shell, ruins contents and makes any converted container unworkable as an office, store or workshop.
Enverge closed-cell spray foam self-bonds directly to the ribbed steel as it cures, forming a seamless insulating skin with no gaps, joints or fixings. Because it is a closed-cell foam it resists moisture and breaks the thermal bridge that causes condensation, so the steel surface no longer drops below dew point and container rain simply stops forming inside the unit.
The result is a dry, stable, well-insulated container that holds temperature, protects its contents and converts cleanly into usable commercial space. The coating hugs every corrugation tightly, so almost no internal volume is lost, and the steel shell is protected from the corrosion that untreated condensation would otherwise drive.
The benefits for shipping containers
Stops Container Rain
Eliminates the condensation that drips from cold steel ceilings onto stored goods, stock and equipment.
Bonds To Ribbed Steel
Self-adheres to every corrugation as it cures, with no fixings, battens or fabric needed.
Keeps Internal Space
Hugs the profile tightly so usable floor and head height inside the container are barely reduced.
Stabilises Temperature
Buffers the steel box against rapid heating and cooling, keeping contents and converted interiors comfortable.
Protects The Shell
Shields the steel from the corrosion that trapped condensation would otherwise drive over time.
Fast Single Visit
A whole container can often be coated quickly in one mobile visit with minimal disruption.
Bonds to ribbed steel
Closed-cell foam follows the corrugations of the steel and seals completely, stopping condensation and insulating in one pass.
Enverge closed-cell spray foam (Nexseal LE) is applied directly to the cleaned interior steel, where it self-bonds and expands to wrap every corrugation in a continuous, moisture-resistant layer. Its low water absorption and high closed-cell content keep the steel surface above dew point, stopping interstitial condensation and container rain without any vapour barrier, batten or board.
- Seamless coating bonds straight to corrugated steel
- Stops container rain and protects the shell
- Barely reduces usable internal container space
- 25-year manufacturer-backed warranty
Enverge Nexseal LE — verified performance
Typical published values for Enverge Nexseal LE closed-cell foam. Full technical specification →
Specification & compliance for shipping containers
Steel boxes condensate: 'container rain' ruins stored contents and corrodes the shell. A 15–25 mm closed-cell coat sprayed to the ribbed steel stops it at source — the foam bonds to every corrugation and carries its own vapour barrier. For containers and modular units being converted to occupied space, 35–50 mm+ delivers real thermal performance without stud-out framing eating the internal width.
Application and cure happen in a single day per unit, and the same approach upgrades draughty site cabins and modular buildings into warm, dry, usable space.
Where we install shipping containers spray foam
Dedicated local pages for every major city — and we cover the towns and villages between them.
From enquiry to warranty
Enquire
Tell us about your shipping containers & building.
Survey
Free survey of your shipping containers & condensation check.
Specify
The right system for your shipping containers.
Install
Approved applicators, minimal disruption.
Warranty
Handover pack & 25-year warranty.
Real shipping containers spray foam applications
Commercial projects
Depot Events, Cardiff
Closed-cell spray foam across a large warehouse-style venue roof.
Ibstock Brick
Insulation for a temperature-critical manufacturing process.
The Box, Plymouth
Concrete spray foam eliminating cold-bridging and condensation.
Get a quote for your project
Send us your building details and our technical team will specify the right system and a clear budget. No obligation.
Shipping Container insulation, answered
Will spray foam stop condensation inside my shipping container?
Yes. Closed-cell foam bonds to the steel and keeps its surface above dew point, so warm interior air no longer condenses on cold metal. That is what stops "container rain" dripping onto your stored goods and equipment.
How much internal space will I lose?
Very little. The foam follows the corrugated profile of the steel tightly rather than building out a thick boxed wall, so usable floor area and head height inside the container are barely affected once coated.
Can you insulate a container being converted to an office or workshop?
Yes. We insulate containers used as offices, stores, workshops and welfare units across commercial and industrial sites. The seamless coating gives a dry, temperature-stable shell ready for lining out, wiring and fit-out.
Does the foam protect the steel from rust?
By stopping condensation forming on the interior steel, the coating removes the trapped moisture that drives corrosion. The shell stays dry behind the foam rather than sitting wet, which helps protect the container over its working life.
Is this suitable for refrigerated or temperature-sensitive storage?
Closed-cell foam significantly improves a container's thermal stability and resistance to heat gain, making it far better suited to temperature-sensitive commercial storage. For specific performance targets we'll assess your container and intended use on site.
What depth stops container rain?
A 15–25 mm closed-cell coat is enough to stop condensation in storage containers; conversions to occupied space typically take 35–50 mm or more.
Do you need to frame the container out first?
No — the foam bonds directly to the ribbed steel with no battens or framework, preserving internal space.
How long does a container take?
Spraying and curing are typically completed within a single day per unit.
Insulate your shipping containers the right way
Specialist commercial spray foam, installed UK-wide by the Duratite Group's spray foam specialists.
Book a Free Survey →or call 01208 832 602