Flat Roof Systems

Donaldson Timber Systems provides a wide range of loose format & pre-assembled structural floor cassettes suitable for flat roof applications in a variety of projects. Solutions include solid timber and I-beam joist formats, in either a cold roof or warm roof format.

Cold flat roof formats require the insulation and weather proofing above the structural deck and therefore provide a deeper build up, that needs to be considered in the design i.e. balcony or terraced roof applications, where level access and weathering up-stands are needed. Solutions to these are offered in loose joist format, with site fitting decking, firring pieces and weatherproofing, as well as pre-formed open structural floor cassette, with decking pre-fitted, to simplify construction on site.

Warm flat roof formats, have the insulation within the joist void and come as standard, pre-insulated and closed, with a temporary roofing membrane pre-fitted and services battens to the underside. Services are typically run below the cassette, in a separate ceiling void or batten space.

This download contains Revit components for the Donaldson Timber Systems concrete ground floor solutions. Content includes a number of variations including;

• I-Beam and Solid Timber Joists
• Cold Roof - Insulation above joists
• Warm Roof - Insulation within joists
• Loose joists or pre-insulated cassettes
• 9no. flat roof type variations in total.

Please note Donaldson Timber Systems provides a complete in-house design service to assist architects and designers in the specification and modelling of your projects. Please contact Donaldson Timber Systems for additional guidance and to utilise this service.