20mm 400 kPa Overfloor Board

From: £7.19 Inc. VAT£5.99 Exc. VAT

Lifetime guarantee included

400 kPa 20mm Overfloor Board. Suitable for Tiles – no backerboards or intermediate layers required.

Available with a choice of heat output options:-

Plain Board – No aluminium & suitable for brand new maximum insulation properties

50 Microns – Thinnest foil covering & suitable for new builds where Rapid Response® is not required

100 Microns – Medium foil covering & suitable for well insulated properties where Rapid Response® is not required

200 Micron – Thickest aluminium for Rapid Response® & suitable for ALL property including renovations & refurbishments.

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Bulk Offers

Prices exc VAT

No Aluminium - Slow Response

Full Pallet (x168) £5.99 Per Board £1,006.32
Half Pallet (x84) £6.49 Per Board £545.16
Box (x12) £6.79 Per Board £81.48
Single £6.99 Per Board
20mm profile fits 15/16mm max performance pipe
Prices exc VAT

50 Micron Aluminium - Slow Response

Full Pallet (x168) £6.99 Per Board £1,174.32
Half Pallet (x84) £7.49 Per Board £629.16
Box (x12) £7.79 Per Board £93.48
Single £7.99 Per Board
20mm profile fits 15/16mm max performance pipe
Prices exc VAT

100 Micron Aluminium - Medium Response

Full Pallet (x168) £7.99 Per Board £1,342.32
Half Pallet (x84) £8.49 Per Board £713.16
Box (x12) £8.79 Per Board £105.48
Single £8.99 Per Board
20mm profile fits 15/16mm max performance pipe
Prices exc VAT

200 Micron Aluminium - Rapid Response®

Full Pallet (x168) £8.99 Per Board £1,510.32
Half Pallet (x84) £9.49 Per Board £797.16
Box (x12) £9.79 Per Board £117.48
Single £9.99 Per Board
20mm profile fits 15/16mm max performance pipe

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Product Information

Download Factsheet

F01b - EPS OVERFLOOR BOARDS Our EPS boards offer optimal heating performance   Due to recent hot & humid weather conditions, the aluminium covering may become discoloured. This is purely cosmetic and will in no way affect the performance or longevity of the board. 20mm Boards use High Output 16mm Pipe. 400 kPa - Approved for Tiling directly onto - without the need for a backerboard. Wunda's low profile 400 kPa Overfloor boards are 400 kPa, the strongest available.  Read our blog on why kPa is important! Available with a choice of Plain Board, 50 Micron, 100 Micron and Rapid Response® 200 Micron aluminium. 200 microns will give optimum system performance, aluminium any thicker than 200 microns offers no performance gain and system performance will plateaux. Wunda's 400 kPa Overfloor 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 - NO intermediate layers or levelling screed required! 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.
  • 400 kPa - the strongest EPS board available (400kPa)
  • 20mm board for 16mm pipe; also available in 16mm size
  • Available as Plain, 50 Micron, 100 Micron and 200 Micron Rapid Response®
  • Mapei & Instarmac approved for tiling directly onto
  • 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 or tiles can be fixed to the boards using Mapei or Instarmac  approved adhesive (available from Wunda). If you wish to carpet or lay vinyl a suitable backer board will need to be laid on the Overfloor boards. Recommended maximum linear loop length of 100m.

Rapid Response® and maximum heat is only possible with 200 micron aluminium

Aluminium thickness in microns Board heat up speed Heat output Under Wood, Laminate or Engineered Heat output Under Carpet
200 Micron Super Fast 100w/m² 80w/m²
100 Micron Fast 60w/m² 55w/m²
50 Micron Slow 40w/m² 35w/m²
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. 100 Microns is a medium foil covering offering good response in well insulated properties where rapid response is not required. 50 Microns is a thin foil covering giving slower performance and is only suitable for New Builds where rapid response is not required. Plain boards with no foil are only suitable for brand new highly insulated properties.

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

Maximum Pipe Loop Length100m
Pipe Spacing150mm
pa_single-bulk1118, 1377, 1378, 1401, 1402, 1763, 1764, 1771, 1772
Material400KPA Polystyrene
Guaranteed forLIFETIME
Weight1.0kg
Width600mm
Depth20mm
Length1200mm
Aluminium ThicknessPlain Board - Slow Response, 50 Micron - Slow Response, 100 Micron - Medium Response, 200 Micron Rapid Response®
Single / Box / Half Pallet / Full PalletSingle, Half Pallet (x84) @ £6.49 each, Full Pallet (x168) @ £5.99 each, Half Pallet (x84) @ £7.49 each, Full Pallet (x168) @ £6.99 each, Half Pallet (x84) @ £8.49 each, Full Pallet (x168) @ £7.99 each, Half Pallet (x84) @ £9.49 each, Full Pallet (x168) @ £8.99 each, Box (x12) @ £9.79 each, Box (x12) @ £8.79 each, Box (x12) @ £7.79 each, Box (x12) @ £6.79 each

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