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Joist strips designed as an economical acoustic layer to be used on top of joisted construction and under timber structural floors. The strip is a thin solution that is simply stapled to the top of the joists to reduce impact sound transmission through timber internal floors.

When used in conjunction with Hush Slab 100 between the joists and the correct plasterboard lining, it complies with the internal airborne floor regulations of 40 dB (Rw) stated in Building Regulations Approved Document E (E&W), Technical Handbook G (Northern Ireland) and 43 dB (Rw) stated in Technical Handbook Section 5 (Scotland).


  • Thin solution for isolating timber floors from joists.
  • Excellent impact reduction.
  • Easy to install.
  • Improves acoustic performance in domestic dwellings.

General information

Thin solution for isolating timber floors from joists

Excellent impact reduction

Easy to install

Improves acoustic performance in domestic dwellings

Uniclass 2015 Resilient layer insulation (Pr_25_57_06_71)
Specification data
Product Reference

Hush DF 10 Joist Strip

Standard product features

Size (l x w):

1370 x 50 mm.


10 mm (will compress to 8 mm when in use).


Black/ beige.

Technical properties:

  • Tensile strength (to DIN EN ISO 1798): 0.8 N/mm².
  • Elongation at break (to DIN EN ISO 1798): 125%.
  • Density (approximate): 770 kg/m³.
  • Service temperature: -30 to +80°C.
  • Fire resistance (to BS EN 13501-1): Efl.