34 Broomfield Road

Chelmsford, Essex, CM1 1SW

01245 929122



Softlay is our patented range of vinyl glass-fibre fleece acoustic systems and are suitable for/under the following:

  • Textile floor coverings
  • PVC, LVT, vinyl sheet and cushioned vinyl coverings EN 685 33-43 (K5)
  • Linoleum (on load distributing layer)
  • Laminate, hard wood and engineered floor boards
  • Raised access floors
  • Absorbent and non-absorbent, level and if necessary, prepared surfaces
  • Domestic and commercial locations, new build, especially renovation and refurbishment projects and on surfaces with poor acoustic and thermal properties
  • Softlay 21 is suitable for use over warm water underfloor heating systems in accordance with EN 12664
  • For rolling load properties please contact the Softlay technical team

Subfloor preparation

Subfloor must be level, sound and free from cracks, dry, clean and free from materials that would impair adhesion.

Benefits of Softlay

  • Easy to cut and install
  • Incredible lay flat properties
  • Distinctive surface finish
  • Extremely high resistance to indentation
  • Vapour resistant
  • Acoustically and thermally insulating
  • Increases underfoot and ambient comfort
  • Resistant to water and cleaning processes

Application and Bonding the Underlay

Thoroughly vacuum the surface first then lay out the underlay, direction is optional depending on floor space however, if the underlay is to run parallel with the floor finish then the joints must be off-set by 300mm for sheet covering and 100mm for LVT’s.
Cut in as required using a utility or craft knife, if using Softlay 21 with the self-adhesive layer, simply remove the protective film and lay sticky side down to the sub-floor, roll with a 65kg roller following the usual methods for floor coverings set out in BS8203.
If using Softlay 21 without the self-adhesive layer then bond the underlay to the sub-floor with a suitable adhesive, again following the usual methods for floor coverings set out in BS 8203 and as set out in the floor covering manufacturers literature.
Correct acclimatisation of the Softlay and the floorcovering as set out in the British Standards and manufacturers data sheet is paramount.
Whilst Softlay 21 can be used in conjunction with most performance adhesive or sub-floor preparation products A.S.A.J Ltd recommend Uzin products.
For correct sub-floor and adhesive specification please obtain technical advice from the relevant supplier.
A perimeter expansion gap for Softlay Foil and the subsequent floor covering is required; please contact the Softlay technical team for advice.

Bonding the surface covering.

Install the floor finish once the adhesive used to bond to Softlay 21 has reached an adequate strength. Joints in the floor covering must be offset by 300mm for sheet covering and 100mm for LVTs or tiles.

Important information

  • Store rolls on end. Minimum shelf life 24 months.
  • Required working conditions and methodology are as set out in BS 5325 and BS 8203.
  • The castor wheel resistance and indentation properties of floor coverings can change when used in conjunction with insulating underlays. For bonding onto Softlay, PVC/cushioned vinyl must meet wear classification EN 685 33-43 (K5). Despite the high indentation recovery of the underlay, some visual and residual indentation in textile and resilient coverings cannot be completely excluded. If in doubt obtain technical advice.
  • On underfloor heating systems, floor coverings should, in accordance with DIN EN 1264, not exceed a thermal transfer resistivity of 0.15m22K/W. The TTR of the double layer of underlay and covering is the sum of their individual values.

The following standards and notices are applicable and especially recommended:

  • DIN 18 365 – Working with floor coverings.
  • Publication of the Adhesives Industry Association – Assessment and preparation of substrates  bonding resilient and textile floor coverings.
  • TKB publication – Assessment and preparation of substrates for floor covering and wood flooring installation 06/2004.
  • BEB publication – Assessment and preparation of surfaces 02/2002
  • DIN 18 365 – Working with wood flooring.
  • Publication of the Adhesives Industry Association TKB 1 Bonding of wood flooring.
  • BS 8203 and BS 5325.
  • All relevant local codes of practice and industry accepted fitting methods.
  • Whilst Softlay has the ability to absorb some very minor imperfections it is generally required that an equivalent preparation standard for direct installation of a PVC/LVT would be required for Softlay.

Protection of the workplace and the environment

No special measures are required, for adhesives and coating please refer to the manufacturer’s literature.

All product residues are treated as normal household or construction waste.

The above information is based on our experience and careful investigations. The variety of associated materials and different construction and working conditions cannot be individually checked or influenced by us. The quality of your work depends, therefore, on your own professional judgement and product usage. If in doubt, you must conduct a small test or obtain technical advice. Observe the installation recommendations of the covering manufacturer.


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