Underfloor Spray Foam Insulation in Wales

Make your home or business warmer, more energy-efficient and draught-free with high-performance underfloor insulation installed by trusted experts across Wales.

At Spray Foam Wales, we specialise in applying closed-cell spray foam insulation beneath suspended floors in both domestic and commercial properties. Whether you’re renovating a period home, upgrading a new build or insulating a commercial space, underfloor spray foam offers outstanding thermal performance, air sealing, and long-term energy savings.

Underfloor spray foam Insulation Wales

Why Choose Underfloor Spray Foam?

Traditional insulation methods like mineral wool or rigid board can leave gaps and degrade over time. In contrast, spray foam expands to form a seamless, airtight barrier under your floorboards – keeping heat in and cold out.

Benefits of underfloor spray foam insulation:

  • Stops cold draughts coming up through floorboards

  • Reduces heat loss and improves energy efficiency

  • Helps lower heating bills

  • Acts as a vapour barrier to prevent damp

  • Adds strength to suspended floor structures

  • Ideal for hard-to-reach or uneven floors

We use ThermoFoam™ closed-cell insulation, BBA-certified and perfect for floor applications.

Ideal for Homes and Businesses 

We insulate all types of floors, including:

  • Suspended timber floors (typical in older homes)

  • Commercial office floors with air gaps

  • Crawl spaces and voids beneath raised floors

  • Conservatories, extensions and modular buildings

  • Farmhouses and rural properties with uneven floors

Need spray foam for other areas too? Explore our loft and roof insulation or campervan insulation services

Under floor Spray foam Insulation Wales

FAQ's

Yes – it’s ideal for use under suspended timber floors. It forms an airtight seal without lifting or removing the floor above.

Absolutely. Spray foam seals gaps and cracks that allow cold air to rise from the void beneath your home.

Yes – we use ThermoFoam™ closed-cell spray foam, which is safe, BBA-approved, and fully cured within hours.

Most installations are completed in 1 day, depending on floor size and access.

No need to lift the floor! We access the underfloor void via crawl space or an access hatch — all we ask is that the area is clear underneath if possible.

Contact Spray Foam Wales

We’re happy to advise on the best insulation solution for your floor type and property. Whether it’s a single room or an entire building, we’ll help you stay warm, dry and energy-efficient.

Contact us today or request your free quote below.

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