The patented grate in the High Performance Bushfire Weepa is designed so that under extreme heat from bush fires it doesn't melt. Instead, it chars and retains its structural integrity. The stainless steel mesh is retained in situ protecting the cavity from fire brands and sparks. Mesh specifications: T304 grade stainless steel woven mesh, wire aperture 0.415mm, wire diameter 0.22mm.
CSIRO Technical Assessment No 350 - extract
"The High Performance Bushfire Weepa is suitable for installation in Bushfire Attack Levels BAL-LOW, BAL-12.5, BAL19, BAL-29, BAL-40 as defined in AS 3959-2009 and is also suitable for installation in Bushfire Level BAL-FZ when a minimum setback distance of 10 m from the classified vegetation is achieved."
Install the Weepa between bricks or blocks, at specified intervals and firmly in contact with the flashing. For rendering, set out a few millimetres.
When rendering, the Weepa needs to be loosened in the masonry so the renderer can adjust the Weepa in and out. Grab internal rib to adjust Weepa in and out.
After clean up, use a small, flat screwdriver to prise the mortar cover up at the bottom.
The High Performance Bushfire Weepa has a specially formulated grate (with stainless steel mesh set behind) which chars and self extinguishes.
Make sure the new Weepa is installed when the masonry wall is built.
Loosen the Weepa and pull out proud of masonry.
Lay on render around the Weepa.
Screen off around the Weepa.
Pat the Weepa flush with the surface.
Float around the Weepa.
For easy removal later, wipe the mortar guard clean now, then again after painting.
After finish and cleanup remove the mortar guard for beautiful weepholes.