The EcoTherm Eco-Versal is a fibre free rigid PIR insulation board with aluminium foil composite facings on both sides, a 5 in 1 solution for floors, pitched roofs, cold flat roofs, timber frame walls, solid walls, dormer cheeks and ceilings. With a thermal conductivity of 0.022 W/mK it delivers high performance in minimal thickness.
For floors it is laid above the damp proof membrane under screed, including underfloor heating screeds, with a typical compressive strength of 140 kPa and a uniformly distributed load capacity of 30 kN/m². Each 2400 x 1200mm board covers 2.88 m² and is available in 10 thicknesses from 25mm to 150mm.
0.022 W/mK
Thermal conductivity
140 kPa
Compressive strength
2.88 m²
Coverage per board
Above the damp proof membrane, with a protective layer under screed
Eco-Versal must be used above the DPM and must not contact moisture from the ground. Where a concrete slab exists or is specified, overlay the boards with a protective membrane of minimum 500 gauge before applying the screed. It should not be used to isolate dampness or in continuously damp conditions.
Follow your underfloor heating manufacturer's guidance
Lay boards closely butted with staggered joints and allow for the screed depth your UFH system requires. Use a detailed U-value calculation for each project, as floor U-values depend on the exposed perimeter to area ratio. Confirm the board thickness with your heating designer.
Foil joints and handling
Self adhesive foil tape on board joints completes the vapour control layer. Cut with a sharp knife or fine tooth saw, wear eye and hand protection, and keep boards flat, dry and covered from sunlight.
Key features
5 in 1 versatility
One board for floors, pitched roofs, flat roofs, timber frame walls and ceilings keeps stock simple.
High performance PIR
Fibre free rigid PIR core with 0.022 W/mK gives high thermal resistance in a slim board.
Strong enough for screeded floors
140 kPa compressive strength and 30 kN/m² permanent dead load suit domestic, office and non-domestic floors.
Foil facings
Aluminium foil composite facings on both sides give a high water vapour resistance and low emissivity surface.
Certified
BBA Agrement Certificate 99/3569, ISO 9001 and ISO 14001 manufacture, and a CE Declaration of Performance.
Environmentally responsible
CFC and HCFC free blowing agent with zero ozone depletion potential and low global warming potential.
Technical specification
Product details
Core
Fibre free rigid polyisocyanurate (PIR)
Facings
Aluminium foil composite, both sides
Board size
2400 x 1200mm (2.88 m²)
Thicknesses
25mm to 150mm in this range
Performance
Thermal conductivity
0.022 W/mK (BS EN 13165)
Compressive strength
140 kPa typical at 10% compression (BS EN 826)
Floor loading
Resists 30 kN/m² uniformly distributed permanent load
Surface spread of flame
BS 476-7 Class 1; Euroclass F
Vapour control
Integral vapour control layer from foil facings
Maximum span on framing
600mm
Floor installation
Solid floor above slab
Lay closely butted with staggered joints, above the DPM
Under screed
Overlay with minimum 500 gauge protective membrane before screed on a concrete slab
Other floors
Suspended block and beam; suspended timber
U-values
Depend on exposed perimeter to area ratio; calculate for each project
Certification and environment
BBA Agrement Certificate
99/3569
Management systems
ISO 9001 and ISO 14001
Blowing agent
CFC and HCFC free; zero ODP; low GWP
BRE Green Guide
Generic specification rating A
Thickness variants: 2400 x 1200mm boards
Thickness
EcoTherm code
Boards per bundle
Bundle coverage
R-value (m²K/W)
Weight per board
25mm
PR25
13
37.44 m²
1.14
3.38 kg
30mm
PR30
10
28.80 m²
1.36
3.83 kg
40mm
PR40
8
23.04 m²
1.82
4.72 kg
50mm
PR50
6
17.28 m²
2.27
5.62 kg
70mm
PR70
4
11.52 m²
3.18
7.40 kg
75mm
PR75
4
11.52 m²
3.41
7.85 kg
90mm
PR90
4
11.52 m²
4.09
9.19 kg
100mm
PR100
3
8.64 m²
4.55
10.08 kg
120mm
PR120
3
8.64 m²
5.45
11.87 kg
150mm
PR150
2
5.76 m²
6.82
14.54 kg
Frequently asked questions
Can Eco-Versal go under a screeded underfloor heating system?
Yes. It is designed for solid floors under screed and its 140 kPa compressive strength suits screeded floors. Use it above the DPM, with a 500 gauge membrane over a concrete slab before screeding, and follow your UFH manufacturer's instructions.
What thicknesses are available?
25, 30, 40, 50, 70, 75, 90, 100, 120 and 150mm in this range, each 2400 x 1200mm. See the variant table for pack quantities, R-values and weights.
What is the thermal conductivity?
0.022 W/mK. Thermal resistance rises with thickness, from 1.14 m²K/W at 25mm to 6.82 m²K/W at 150mm.
How strong is it underfoot?
Typical compressive strength is 140 kPa and the boards resist a uniformly distributed permanent load of 30 kN/m², suitable for domestic, office and non-domestic floor categories in BS EN 1991-1-1.
Should the joints be taped?
Butt the boards closely with staggered joints and use proprietary self adhesive foil tape at joints to complete the vapour control layer and maximise thermal performance.
How should I store and cut the boards?
Store flat, dry and off the ground, covered from sunlight. Cut with a sharp knife or fine tooth saw, wear eye and hand protection, and use a dust mask when power tools create dust.