Cavity Closers (uPVC)

• Straight lip to provide a tight and consistent seal with vertical panels which prevent water from wicking up from the ground, rainfall off of the roof or sprinkler head directing water upward. The tight seal also prevents vermin intrusion into the cavity. *Designers/builders must use the correct size cavity closer to achieve this seal and comply with the NZ Building Code.

• Ventilation holes allow moisture to drain from the cavity. Bottom ventilation permits a minimum of 1000mm2 per metre length of air into the cavity as specified by E2/AS1. For enhanced drying capacity, use the Top Vent Closer.

• Strong product thickness to provide panel support.

• Available in a variety of sizes.

• All Cavity Closers and the Top Vent Closer are manufactured from rigid uPVC and are supplied in 2.7m lengths.

• All products are biologically and chemically resistant to treated materials such as treated timber. They will not rust nor react if in a salt zone.

• The uPVC compound is stabilised for UV protection as required by the NZBC.

• It is lightweight, allowing for easy transportation and installation.

A top and bottom Cavity Closer is designed from extruded uPVC for either a Drained Cavity wall or Ventilated Cavity wall situation.

• A drained cavity wall is vented at the bottom only. Water can drain, and limited (but often sufficient) air can enter the cavity to dry any remaining moisture between wetting cycles.

Products required: Redway Cavity Closer.

• A ventilated cavity wall is vented at the top and bottom. As per the drained cavity, the bottom vent allows drainage and air entry. The addition of the top vent creates a moving air path. This method should be considered when drying is inhibited due to rapid wetting cycles or where walls are permanently shaded, as they pose a higher risk of moisture build up and mould formation.

Products required: Redway Cavity Closer and Redway Top Vent Cavity Closer.