Question22
22. I am building a room-in-the-roof conversion and
need to upgrade the fire performance of the floor without renewing
or replacing the existing lath and plaster ceiling. What can I
do?
Provided the joists are at least 37mm wide x 200mm deep with
spacings no greater than 600mm, and with floor boarding at least
18mm thick, you can upgrade the ceiling. Drape 25mm chicken wire
mesh over the joists, down the side of the joists and over the
existing ceiling, stapling it to the sides of the joists. Then
install 100mm of Rocksilk Universal Slab RS33 or 100mm of Rocksilk
Flexible Slab between the joists and onto the wire mesh cradle
ensure all slabs are tightly butted together.