Specialist commercial spray foam insulation for Harrow and London — warehouses, farms, asbestos roofs and more. Installed UK-wide by the Duratite Group's spray foam specialists.

London and the capital's commercial, logistics and refurbishment projects demand fast, low-disruption insulation that works around occupied, congested sites. Closed-cell spray foam upgrades roofs, soffits and plant rooms in place, sealing and insulating in one application.
ThermoFoam delivers Specialist commercial spray foam insulation across Harrow and London, installed UK-wide by the Duratite Group of Companies. Whether you run commercial, logistics, refurbishment and public buildings, we seal and insulate your building in a single application — eliminating condensation, cutting heat loss and protecting the structure, all backed by a 25-year manufacturer-backed product warranty.
Self-bonds to the roof and holds the surface above dew point, ending drip and corrosion.
A seamless, airtight envelope that lowers energy costs across large London buildings.
Sticks to corrugated, concrete, metal and asbestos where rigid boards can't fit.
Sprayed in-situ in days, working around your live operation in Harrow.
Manufacturer-backed, with full handover documentation.
Local coverage of Harrow backed by the Duratite Group's national delivery.

Underside of a car-park deck sealed and insulated in-situ.

Low-odour, fully documented install in a live public-sector site.

Concrete spray foam eliminating cold-bridging and condensation.
Send us your building details and our technical team will specify the right system and a clear budget. No obligation.
Searching for spray foam installers in Harrow? ThermoFoam installs through approved applicator teams working to the manufacturer's specification — covering Harrow and the whole of London from our UK-wide operation. Every project is surveyed first, specified in writing, installed by trained applicators and handed over with full documentation and a 25-year manufacturer-backed product warranty. We install for commercial, industrial and agricultural buildings only.
Yes. ThermoFoam installs commercial spray foam insulation across Harrow and the wider London area, and UK-wide as part of the Duratite Group of Companies. Call 01208 832 602 to arrange a free survey.
Commercial, industrial and agricultural buildings only — warehouses, factories, commercial, logistics, refurbishment and public buildings, farm buildings, car-park soffits and more. We do not undertake domestic work.
Yes. We install Enverge closed-cell spray foam; the Nexseal LE system carries a 25-year manufacturer-backed product warranty.
In most cases yes. Closed-cell foam self-bonds to the roof and keeps the surface above dew point, stopping the condensation that drips onto stock and corrodes steel. A survey confirms the right specification.
Yes — ThermoFoam's approved applicator teams install commercial spray foam in Harrow and throughout London as part of our UK-wide operation. Every install is delivered to the manufacturer's specification with full handover documentation.
We arrange free site surveys across London promptly. Send your building details via the form or call 01208 832 602 and our technical team will be in touch within one working day.
Specialist commercial spray foam, installed across London and UK-wide by the Duratite Group's specialists.
Book a Free Survey →or call 01208 832 602