The ProctorVent Drainage Batten (DB-FR) is a high compressive strength (min. 300kPa) drainage batten manufactured from a fire retardant polyolefin extrusion. It is common industry practice with metal roofing to install sarking running up the roof, fixed above roof battens. Such practice restricts air movement and drainage between the sarking and flat profile or concealed-fix roof cladding. This can also lead to ponding if there is excessive drape in the sarking, or can result in the sarking, if pulled tight, being in direct contact with the roof sheet.

DB-FR has been designed to resolve these issues with a drainage batten to provide for air and vapour movement and a pathway for drainage between the sarking and the roof cladding.

DB-FR allows for vapour permeable membranes to be installed without direct contact to the roof or wall cladding thus reducing localised condensation risk on the interior face of these membranes.

DB-FR reduces conductive heat transfer between the roof or wall cladding and the structure and does not restrict buoyancy induced air flow under the roof sheet.