Roof Cassettes

The Streif roof cassette system

STREIF’s heavy duty roof cassette system is the ideal solution for mono pitched roofs, flat roofs and rooms in the roof, and especially where buildings need to be made watertight fast.

Streif Roof Cassettes

Manufacturing process

Manufactured under controlled factory conditions to provide a robust and completely level platform, they’re ready to receive floor coverings or secondary systems.

The solid timber joists are strong – minimum 240mm x 60mm, C24 graded, Scots Pine, PEFC, 15% (±3%) moisture content, and fully treated to last.

Streif Floor Cassettes

About the system

Single cassettes are up to 13m long and 2.5m wide, and using STREIF’s special connection system almost limitless spans are now possible.

The system is very quick – with our highly trained crews up to 1,000m² of floor cassettes can be installed in a day, meeting the highest levels of quality and safety.

Suitable for timber frame, masonry or steel frame construction, and routinely strong enough and stable enough to receive full sand and cement screeds.

Streif Floor Cassettes


  • 100% PEFC timber product.
  • Wolmanit CX10 timber treatment.
  • Cassette sizes up to 13m x 2.5m.
  • Solid timber construction, not I-joists or Posi-joists.
  • Better strength, stability & fire resistance.
  • Supply only, supply & training, or supply & fix.
  • Lifting straps for craneage and crew harnesses.
  • Very fast and safe installation rates.
  • Zero site waste & better site safety.
  • Full structural calculations supplied.

Streif Floor Cassettes


  • 22mm OSB 3, WBP plywood or P5 chipboard flooring.
  • Pre-insulation with up to 240mm mineral wool or EPS.
  • Multiple joist configurations to take the highest loads.
  • Special in-line steelwork system to connect cassettes.
  • Pre-drilling of timber joists to accept M & E services.
  • Glulam joists for cantilevered designs and balconies.
  • Breather membranes for greater air tightness.
  • Fire protection and acoustic design.

Streif UK System

Download our roof cassette brochure

Want to know more about the roof cassette system from Streif UK? Please download a complimentary copy of our brochure.

Download Brochure