Page 7 of 11 pages
12 Dry wall - Frameless Installation Procedure
– Fig. 12
12.1
This is similar to Cleated installation. Refer to section 11 for this recommended
detail. Also, refer to section 5 for wall preparation instructions.
12.2
Depending on wall thickness, it may ease connection of ductwork, if connecting
ductwork is attached to damper prior to fitting pattress around damper.
12.3
Prepare a pair of spacing blocks, (approx. 10mm high x 25mm square) from any
available material (such as drywall boards). Position spacing blocks within the
opening at extremities of damper, and stand the damper on blocks so that damper
is central in opening, with blades running horizontally
12.4
Position and temporarily support damper centrally in wall opening.
12.5
Prepare 16 off pattress pieces from plasterboard of same material as main
construction). Plasterboard pattress should be sufficiently wide to butt up to
damper spigots/duct and overlap the outer edge of the track lining the opening by
at least 10mm. They need to be long enough to form neat corners.
12.6
Two layers of pattress are required each side of wall and the corners should
‘overlap’ between the first and second layers.
12.7
Fit second pattress to other side of wall in similar manner.
12.8
Apply intumescent sealant to the pattress parts and fit snugly up against the
spigot.
12.9
It is not a necessity to fill the void between the pattresses, but it can be done for
insulation purposes if desired.
12.10
Important:
Ensure the drywall
screws ‘pick up’ the track lining the hole, so that
the proper fire integrity of the installation will not be compromised.
Figs 11
Figs 12
