Commercial New Build Spray Foam Insulation
Hit airtightness and thermal targets on commercial new builds — fast, space-saving, Enverge spray foam. Installed UK-wide.
Why spray foam for new builds
Commercial new builds face tight airtightness and Part L targets, compressed programmes and pressure to maximise usable floor area. Traditional board insulation relies on rigid panels cut and fixed around steel, services and junctions, leaving gaps and cold bridges that undermine the air test and slow the build. Reworking a failed air test late in the programme is costly and disruptive.
Enverge closed-cell spray foam is applied as a seamless layer that self-bonds to the substrate as it cures, expanding into every junction, penetration and irregular detail. It insulates and helps seal the building envelope in one continuous pass, addressing the air leakage paths that board systems struggle to close — supporting airtightness performance and a smoother route to Part L compliance.
The outcome is a tighter, better-insulated envelope delivered by a single fast trade. Continuous adhesion removes gaps and cold bridges, the slim closed-cell build-up frees up space within the construction, and the work integrates cleanly into the programme — helping the project hit its targets right first time.
The benefits for new builds
Airtightness Support
Seamless self-bonding layer seals junctions and penetrations that board insulation leaves open, supporting the air test.
Part L Compliance
Continuous high-performance insulation helps the envelope meet Part L of the Building Regulations targets.
Space-Saving Build-Up
Slim closed-cell layer delivers insulation in a thinner thickness, freeing usable floor area within the construction.
Single Fast Trade
One spray application insulates and air-seals in a pass, removing multiple board and tape sequences.
Programme Friendly
Fast application keeps insulation off the critical path and integrates cleanly into the build schedule.
Right First Time
Continuous adhesion removes cold bridges and gaps, reducing the risk of costly late air-test failures.
Built-in performance
Closed-cell foam seals the building envelope as it cures, delivering airtightness and thermal performance that lasts the life of the building.
Enverge closed-cell foam (Nexseal LE / Nexseal 2.0) is spray-applied to the envelope substrate and self-bonds as it cures, expanding to fill voids around steelwork, services and complex junctions. This forms a continuous, rigid, vapour-resistant insulating layer with no fasteners or boards — closing air leakage paths and cold bridges in a single fast pass to support airtightness and Part L objectives.
- Seamless self-bonding layer supports airtightness testing
- Helps meet Part L of the Building Regulations
- 25-year manufacturer-backed product warranty
- One fast trade — insulates and air-seals in a single pass
Enverge Nexseal LE — verified performance
Typical published values for Enverge Nexseal LE closed-cell foam. Full technical specification →
Specification & compliance for new builds
Every roof is different, so the system is chosen to suit: Enverge Nexseal LE closed-cell foam (λ 0.027 W/m·K) where an integral vapour barrier and rigidity are needed, or Sucraseal open-cell (λ 0.039 W/m·K) where breathability matters. Condensation risk is assessed in line with BS 5250:2021 before any foam is applied — the discipline that separates a specialist commercial install from a generic one.
Applied to the underside of the deck, the foam seals every gap, junction and penetration in one continuous pass, helping the roof meet Part L upgrade targets without giving up internal space. Handover includes the full specification and a 25-year manufacturer-backed product warranty.
From enquiry to warranty
Enquire
Tell us about your new builds & building.
Survey
Free survey of your new builds & condensation check.
Specify
The right system for your new builds.
Install
Approved applicators, minimal disruption.
Warranty
Handover pack & 25-year warranty.
Real new builds 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.
New Build insulation, answered
Does spray foam help us pass the air test?
Yes. Because the foam self-bonds and expands into every junction, penetration and irregular detail, it closes the air leakage paths that taped board systems often miss. This gives a more continuous airtight layer and supports a stronger result at the air permeability test.
Will it help us hit Part L?
Spray foam provides continuous, high-performance insulation across the envelope, helping the design meet Part L of the Building Regulations. Final compliance depends on the whole building specification, so we work alongside your design team rather than guaranteeing figures in isolation.
What is the programme impact?
Application is fast and covers complex details in one pass, so insulation and air-sealing happen together rather than as separate board and tape sequences. This keeps the work off the critical path and reduces the trade coordination that slows traditional build-ups.
Does it save space compared to boards?
Closed-cell foam delivers a high insulation performance in a slim build-up and self-bonds without a fixing zone or battens. That can free up usable floor area or reduce the construction depth compared with rigid board systems on the same envelope.
Is it suitable for steel-frame commercial buildings?
Yes. The foam expands around steelwork, services and awkward junctions and bonds directly to the substrate, making it well suited to steel-frame warehouses, units and commercial new builds. We work on commercial and industrial projects only.
Closed-cell or open-cell — which will my roof need?
It depends on the build-up: Nexseal LE closed-cell brings an integral vapour barrier and rigidity; Sucraseal open-cell offers breathability and acoustic absorption. We confirm the right system after the survey.
Is condensation risk assessed before installation?
Yes — the build-up is checked against BS 5250:2021 so the roof performs correctly through the seasons, not just on day one.
Will it help with Part L compliance?
Spray foam's continuous, airtight layer is an efficient way to reach Part L upgrade targets, and we document the installed specification for Building Control.
Insulate your new builds 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