Warm flat roof - Metal deck

For flat roofing applications, Rockwool Acoustic Membrane should be laid directly onto the metal decking, across the line of the profiles. The metal decking must be clean and dry.

Align the membrane and extend the roll (or sheets) over the metal decking progressively.

Please note that it is not necessary to remove the protective plastic film.
 
All membrane joints should be overlapped by 50mm as small openings can reduce the level of acoustic insulation required.
 
A Polythene VCL (should BS 5250:1989 calculations require installation) is applied, followed by the application of Rockwool Hardrock Dual Density Roofing Boards. A Mechanically fastened single ply membrane should then be installed in accordance with the manufacturers specification requirements.
 
Day joints must be formed at the conclusion of each section of work to seal exposed edges of insulation boards and acoustic membrane.
 
Installation of all components should be in accordance with BS6229:2003 (Code of practice for Flat Roofs with continuously supported coverings).