Wundatherm High Density – Underfloor Heating Board

From: £10.79 Inc. VAT£8.99 Exc. VAT

Lifetime guarantee included

Wundatherm High Density is suitable for tiling direct – no backerboards or intermediate layers required*, just prime the aluminium for tile adhesives.

No need to dig up floors, just spray and lay!

Tile direct to board! 400 kPa strength – Suitable for fitting Tile, Stone, Laminate & wood direct to boards.

Choose Ultimate for the best heat spread on the market!

Wundatherm is suitable for ALL property types including renovations & refurbishments.

Dimensions: 1200mm x 600mm

16mm boards use 12mm pipe in 80m lengths

20mm boards use 16mm pipe in 100m lengths

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Product Prices & Floor Coverings

400 kPa Strength for Tiling direct to board

Marble, Stone & Ceramic Tiles No Intermediate Layer Required
Wood Flooring No Intermediate Layer Required
Laminate No Intermediate Layer Required
Carpet Intermediate Layer Required
Vinyl Intermediate Layer Required
Luxury Vinyl Tile Intermediate Layer Required
Approved by Mapei & ULTRA

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Product Information

Download Factsheet

16mm boards require 12mm pipe in 80m (inc. up to 20m transitional) lengths using 120mm pipe spacings 20mm boards require 16mm pipe in 100m lengths using 150mm pipe spacings Approved for Tiling directly onto - without the need for a backerboard*, just prime the aluminium for tile adhesives.
Wundatherm High Density is made with 400 kPa polystyrene, the strongest available on the market.  Read our blog on why kPa is important! 200 microns will give optimum system performance, aluminium any thicker than 200 microns offers no performance gain and system performance will plateaux. Wundatherm underfloor heating boards are lightweight, super strong, easy to fit and designed to be fitted over any existing or new floor. No specialist tools are required, they can be simply cut to shape using a fine toothed saw or craft knife. MAPEI & INSTARMAC approved for tiling directly onto - Using Mapei & Instarmac approved S2 flexible adhesive and primers please Refer to factsheet FO1b. *Natural stone may require a backerboard - please call for details or refer to Factsheet FO1b for specific details. MAPEI & ULTRA approved for tiling Suitable for Laminate, Wood, Carpet Vinyl and even Tiles. Quick to install using Wunda Spray contact adhesive ready for use straight away. 400 kPa - Fully approved by Mapei & Instarmac for tiling directly onto Using Mapei & Instarmac approved S2 flexible adhesive and primers please Refer to factsheet FO1b.
  • 400 kPa - the strongest EPS board available (Uses 4 times the material of Wundatherm Low Density for superior strength)
  • 16mm board uses 120mm pipe spacings with 60m pipe lengths
  • 20mm board uses 150mm pipe spacings with 100m pipe length
  • Mapei & Instarmac approved for tiling directly onto using specified methods as per Wunda factsheet FO1b
  • Easy to cut to shape with basic tools
  • Eliminates the moisture, weight, mess and lengthy drying times of a screed Underfloor system
Laminate and engineered wood can be laid directly on top. Tiles can be fixed to the boards using Mapei or Instarmac  approved adhesive (available from Wunda) just prime the aluminium first. If you wish to carpet or lay vinyl a suitable backer board will need to be laid on the Overfloor boards. The recommended maximum linear loop length for a 16mm board is 60m. The recommended maximum linear loop length for a 20mm board is 100m.

Beware when comparing Overfloor boards - although they may all look similar make sure you check the tech spec to ensure it's the correct strength for your desired finish.

Rapid Response® and maximum heat is only possible with Wundatherm Ultimate, because it uses 200 micron aluminium

Aluminium thickness in microns Board heat up speed Heat output Under Wood, Laminate or Engineered Heat output Under Carpet
200 Microns (Ultimate) Rapid Response® 100w/m² 80w/m²
100 Microns (Premium) Very Fast 60w/m² 55w/m²
50 Microns (Basic Plus) Fast 40w/m² 35w/m²
No Aluminium (Basic) Slow 20w/m² 17w/m²
Input temperature used in the above table is 40°c A micron is simply a measurement of thickness where 1000 microns is equal to 1mm. 200 Microns gives the best performance with Rapid Response® in all property types. Suitable for all Refurbishments and Renovations.

Please note: Output and system performance is dependent on insulation standards and environmental conditions.

Maximum Pipe Loop Length20mm = 100m, 16mm = 60m
Pipe Spacing20mm = 150mm pipe spacings, 16mm = 120mm pipe spacings
Material400kPa Expanded Polystyrene
Guaranteed forLifetime
Profile Height20mm (uses 16mm pipe), 16mm (uses 12mm pipe)
Heat up timePlain - 90 mins, 50 Micron - 70 mins, 100 Micron - 50 mins, 200 Micron Rapid Response® - 30 mins
Single / Box / Half Pallet / Full PalletSingle (£9.99 each), Box (x12 pcs @ £9.79 each), Box (x15 pcs @ £9.79 each), Half Pallet (x84 pcs @ £9.49 each), Half Pallet (x90 @ £9.49 each), Full Pallet (x168 pcs @ £8.99 each), Full Pallet (x210 pcs @ £8.99 each), Single (£6.99 each), Box (x12 @ £6.79 each), Half Pallet (x84 @ £6.49 each), Full Pallet (x168 @ £5.99 each), Box (x15 @ £6.79 each), Half Pallet (x90 @ £6.49 each), Full Pallet (x210 @ £5.99), Single (£7.99), Box (x12 @ £ 7.79 each), Half Pallet (x84 @ £7.49 each), Full Pallet (x168 @ £6.99), Box (x15 @ £7.79), Half Pallet (x90 @ £ 7.49), Full Pallet (x210 @ £6.99), Single (£8.99 each), Box (x12 @ £8.79 each), Half Pallet (x84 @ £8.49 each), Full Pallet (x168 @ £7.99), Box (x15 @ £8.79 each), Half Pallet (x90 @ £8.49), Full Pallet (x210 @ £7.99)

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