JCW Stonefloor

A high compressive strength mineral wool slab which offers a cost effective insulation solution. Its dual density (high and low combined) construction provides thermal insulation properties for ground floors and acoustic insulation properties for separating floors. It has been designed to meet the thermal insulation requirements in Building Regulations (E&W) Approved Document L and the acoustic requirements in Building Regulations (E&W) Approved Document E.

Features/ Benefits:

  • Excellent acoustic and thermal performance.
  • Rigid structure makes handling and fitting simple and precise.
  • Reduces thermal and acoustic bridging.
  • Water resistant but DPM required in high water table or to protect against rising damp.
  • High compressive strength enables JCW Stonefloor Underfloor Insulation to support normal floor loadings in domestic property, offices, shops and similar areas.
  • Environmentally friendly and does not contain gases that have ozone depleting (ODP) or global warming potential (GWP). Compliant with Code for Sustainable Homes.

General information


1200 x 600 x 30 mm

Uniclass 2015

Pr_25_57_06_56 Mineral wool slab insulationPrimary


E20/200 Proprietary underslab insulation

E20/30 Underslab insulation

M10/290 Floating construction

M10/40 Floating construction

Specification data - Mineral wool slab insulation

Product Reference

JCW Stonefloor

Standard product features


1200 x 600 x 30 mm.

Fire rating (to BS EN 1350-1):


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