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Application - Ground Floor - build-up and product selection suggestions

Floor slabs made from mineral wool have robust acoustic properties

including between and above joists + between joists, and below joists

Insulating at ground level mainly falls into two categories ... installing upon a Solid Concrete base or incorporated within Suspended Floor

Underfloor heating may form part of the equation.

In suspended floor applications, Phenolic or PIR rigid boards may offer the best solution, and can be used in conjunction with a reflective membrane.

Concrete slabs can benefit from closed cell polystyrene insulation, which can be the most cost effective solution if height is not a major consideration.

Where height is at a premium, reflective foil membrane insulation may form part of a solution

Breather membranes are useful for inhibiting the movement of air and dust.

Ground Floor Level Build-up / Insulation Types / Combinations + Examples

Floor finish
Rigid insulation & upstand
Concrete slab
Damp proof membrane

Floor finish
Chipboard deck
Rigid / semi rigid insulation
Joist cavity
Ventilated void

Floor finish
UFH (Underfloor Heating System)
Rigid Insulation & upstand or Multi-foil
Concrete slab
Damp proof membrane

Floor finish
Chipboard deck
Multi-foil or Single foil (Saddle clips - Optional)
Concrete slab

Floor finish
Chipboard deck
Joist cavity
Multi-foil or Single (Saddle clips - Optional)
Joist cavity
Ventilated void

The brief examples above are indicative of the build-up of various ground floor insulation installations.

When fitting wet system underfloor heating systems above Rigid Board Insulation, it is important to ensure the boards have sufficient strength to hold the system's clips in place while the screed is poured.

Electric underfloor heating systems should not come in contact with a foil-based radiant barrier.

Separating Floor Level Insulation Products

Listed below are links to the most popular application specific product brands associated with Ceiling Level insulation projects

Rigid Insulation Boards

Semi Rigid Insulation

Multi-foil & Breather Foils

Breather & Foil Membranes

Plasterboards & Thermal Laminates

Celecta Acoustic Overlay

Isover Acoustic Roll

Actis Triso Sols

Tyvek Housewrap

Gyproc Plasterboard

Ecotherm Eco-Versal

Knauf Acoustic Roll


Knauf Plasterboard

Ecotherm Pro-Versal

Knauf Earthwool Slabs

YBS Airtec

Siniat GTEC Plasterboard

Recticel Eurothane GP

Rockwool Flexi Slabs

YBS Foiltec

Kingspan K3

Knauf OmniFit Slabs

YBS SuperQuilt

Kingspan TF70

Rockwool RW Slabs

Our Contact Details

Sales Office only:
39 Normandy Road, Worthing, West Sussex, BN14 7DX

Telephone: 0333 9000 989

Facsimile: 0333 7000 797


Web presence:

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Minimum order £175.00 ex-VAT. Delivery vehicle sizes - flexible

Minimum order £500.00 ex-VAT. Delivery vehicles size - 28 tons+

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