In above ground situations or in areas where no free running water is expected, for example where external pavements have been built up the ventilated system can be used. The ventilated system with air gap at top and bottom does not require sealed joints or fixings, a 100 mm overlap is sufficient in this situation. This method is seen as a sympathetic solution in Heritage type properties as a general damp proofing system. The fabric of the building remains unchanged but the new internal surfaces are "dry" and are salt and contamination free.

Both dry lining or plaster direct finishes are available on the ventilated system.