LH-K Underfloor Heating Film Kit

LH K_Kit
  • LH-K heating film kits allow the professional installer to tailor a heating system precisely to a specific space
  • Designed for installation under engineered wood and laminate floors
  • Kit includes heating film, cables , crimps and the required crimping tool
  • Ideal for any room except bathrooms and wet rooms

Range & Prices

The prices shown are list prices and perfectly safe to use for budget purposes. Contact your electrical wholesaler for final prices.

Kit Contents

  • Roll of 500mm wide 130W/m² heating film
  • 15m insulated cold lead (brown)
  • 15m insulated cold lead (blue)
  • 20 connection crimps
  • 20 insulating discs
  • 1m mastic tape
  • Crimping tool
  • Installation instructions
Model Heated Area List Price
LH-K05 Up to 5m² £254.00
LH-K10 5m² to 10m² £371.00
LH-K15 10m² to 15m² £487.00
LH-K20 15m² to 20m² £604.00


LH-K ‘Top Ups’

Model Description List Price
LHTU-05 Roll of film 5m² £139.00
LHTU-10 Roll of film 10m² £277.00
LHTU-15 Roll of film 15m² £416.00
LHTU-20 Roll of film 20m² £554.00
LHTU-BR 15m cold lead brown £18.00
LHTU-BL 15m cold lead blue £18.00
LHTU-CR 20 crimps £17.00
LHTU-MA 1m mastic tape £33.00
LHTU-ID 20 insulating discs £2.00
LHTU-CT Crimping tool £38.00

Insulation/Underlay & Vapour Barrier

Model Description Thickness (mm) Area covered (m²) List Price
I-Pack-6 Pack of 19 boards 6 9.76 £28.00
I-Board-6 Individual Board 6 0.5 £3.00
LHT High adhesion tape (one roll for every 10m² of floor area) £10.00
VB Polythene vapour barrier (one for every 10m² of floor area) £20.00

Technical Specification

Heating Film Specification

Voltage supply: 230V
Outputs: 130W/m²
Film width: 500mm
Film material: Polyester
Approvals: EN60335-2-96 as required by the 17th Edition Wiring Regulations (BS7671.2008)
Product thickness: 1mm nominal


I-Board-6 Insulation/Underlay Specification

Material: Extruded polystyrene foam
Sheet size: 856 x 600
Thickness: 6mm
Compressive stress (@10% foam deformation): 10 t/m²
Thermal conductivity: 0.024W/mk
Water absorption by volume: less than 1%
Density: 32kg/m³


VB Vapour Barrier Specification

Material: Polythene
Colour: Black
Thickness: 250mu
Sheet dimensions: 3m x 4m
Approval: BS EN 13967:2012


If you would like the experts at BN Thermic to select an underfloor heating system for you, please click below to access our enquiry form.  Simply provide as much information as you have available and we will respond with a detailed proposal.

Enquiry Form

Selecting the required film or film for a room is a simple three step process.

Check Floor Surface

LHK layered diag

Components of an LH-K system

LH-K heating films are specifically designed for installation under laminate and engineered wood floors.  They should not be used with other floor surfaces.

If there is any doubt about the suitability of any given floor surface for use with underfloor heating, confirmation should be sought from the flooring supplier.

Select the correct LH-K kit

The objective is generally to cover as high a percentage of the free floor area as possible.  The free floor area is defined as the floor area not occupied by permanent fixtures such as kitchen cabinets and wardrobes.

Select insulation/underlay and vapour barrier



VB Vapour Barrier

VB Vapour Barrier

LH films must be installed onto a layer of I-Board-6 insulation/underlay and below a layer of VB vapour barrier.  Heating film, insulation/underlay and vapour barrier must be held in place with LHT high adhesion tape.  Both I-Board-6 and VB must cover the entire floor area not just the heated area.

I-Board-6 is lightweight and easily cut to shape.


Underfloor heating cables must be thermostatically controlled.  BN Thermic offers a wide range of thermostats from a simple manual device to the latest smart technology.

A16C Manual Thermostat