Part of the Duratite Group of Companies
01208 832 602★★★★★ Rated Excellent on TrustpilotISO 9001 · UK-Wide
ServicesWarehouse & IndustrialAsbestos EncapsulationExternal Foam RoofingConcrete SoffitsAgriculturalAnti-CondensationCorrugated RoofFlat RoofPitched RoofLeisure & PoolsAll services →
Case StudiesUniversity Hospital of WalesLNER Stadium, YorkDepot Events, CardiffTrago Mills, CornwallIbstock Brick, WalsallAll case studies →
ProductsNexseal LE — closed-cellSucraseal — open-cell
KnowledgeSpray Foam Cost GuideFoam vs TraditionalStopping CondensationAsbestos EncapsulationAll guides →
LocationsFAQs01208 832 602Book a Free Survey →
Commercial spray foam experts · Duratite Group

Commercial Soffit Spray Foam Insulation

Sprayed insulation for suitable metal and concrete soffits, with substrate, junctions, services and protective finishes specified together.

Discuss your project →

A specification built around your application

Soffits can include concrete slab undersides, profiled metal decks and exposed areas beneath walkways or other structures. The substrate and construction above it determine the insulation design. A general soffit label is not enough to choose one product and finish for every location.

The survey should establish the performance required, condition of the surface and exposure of the finished installation. Public access, service areas and enclosed voids can need different protection, inspection and maintenance arrangements.

What shapes the insulation specification

Substrate selection

Identify concrete, steel or another construction and its coatings. Preparation and adhesion need to be assessed for the actual surface.

Junction continuity

Include edges, beams, columns and penetrations in the design. The treatment of these details determines how the insulation connects to the surrounding construction.

Exposed finish

Agree the required protective coating or lining and the supporting evidence. Product reaction-to-fire data alone does not establish the compliance of the complete element.

From the Duratite project library

Pondswick: from concrete to coated finish

A documented concrete-soffit application, showing the substrate, installation and finish.

The concrete soffit and access conditions before work at Pondswick substation.
Existing undercroftThe concrete soffit and access conditions before work at Pondswick substation.
Nexseal LE being applied to the underside of the concrete at Pondswick.
Foam applicationNexseal LE being applied to the underside of the concrete at Pondswick.
The completed foam and protective coating at Pondswick substation.
Coated finishThe completed foam and protective coating at Pondswick substation.

See the source project and photographs on Duratite → · Select a photo for the full view.

From project brief to installation

  1. Share the brief

    Send photographs, dimensions, site location and the intended use. Include known defects and the outcome you need, such as reducing heat loss or addressing cold-surface condensation.

  2. Assess the construction

    The survey establishes the accessible substrate, preparation, moisture conditions and practical installation scope. Drawings and existing records help resolve interfaces with other parts of the building or vessel.

  3. Agree the scope and price

    Compare the complete work package: preparation, insulation, protective finish, access and reinstatement. Agree responsibilities and the programme before the work begins.

  4. Record the completed work

    Arrange inspection before the insulation is concealed. Keep the agreed specification, product details and installation records with the asset’s maintenance information.

Understand commercial spray foam costs · Compare insulation approaches

Soffit Insulation questions

How does this differ from concrete soffit insulation?

This page covers the broader soffit application. Use the concrete soffit service for slab-specific condition, thermal-bridge and repair considerations.

Will insulation remove every cold bridge?

That cannot be assumed. Junctions and the complete construction need assessment, and some details may require additional design measures.

What affects the cost of soffit insulation?

The treated area, substrate condition, specified thickness, preparation, access equipment and finish all influence the price. Include the work programme and any removal or reinstatement in the enquiry so quotations cover the same scope.

What should be agreed before installation?

Confirm the product and application, prepared substrate, intended thickness, junction details, protective finish and access arrangements. Ask for the relevant product information, installation records and the specific terms of any proposed warranty.

Free survey

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.

01208 832 602Mon–Fri, 8am–5pm
info@thermofoam.co.ukWe reply within one working day
25-yr product warrantyDocumented, surveyor-ready installs
Book your free surveyNo obligation · we reply within one working day
Got a project? Free no-obligation survey & quote.
01208 832 602Free Survey →