Job
Site Storage
As with untreated wood,
exposure to rain, dampness and humidity can result in elevated moisture content.
As with untreated plywood, it is important to keep PYRO-GUARD material dry by
covering the bundles, storing the material under shelter, elevating the bundles
from ground contact and allowing for air circulation around the wood. Roof
sheating should be covered with felt or roofing immediately after installation.
If wetted during construction, allow to dry before enclosure or covering with
roofing material.
These recommendations correspond to those for untreated plywood in the American
Plywood Association's publication E30M, "Residential and Commercial
Design/Construction Guide," page 17.
Ventilation,
Moisture and Heat
Adequate air flow is
needed across all surfaces in wood roof systems to control moisture and control
temperature. This requires that ventilation be balanced and uniform. Enclosed
cavities under flat or vaulted roofs are particularly hard to ventilate and
require careful attention to detail to assure adequate ventilation air flow.
Cutting,
Milling or Surfacing
For PYRO-GUARD lumber,
milling or ripping parallel to grain should be done prior to treatment. Field
cuts across the grain are permitted after treatment without field treatment of
cut ends. PYRO-GUARD plywood may be cut or ripped in any direction.
Fasteners
Galvanized fasteners have
been recommended for many years for all types of treated wood. PYRO-GUARD is
safe to use with galvanized nails, truss plates, duct work, plumbing, conduit
and copper.
Decay
and Termite Resistance
Treatment with PYRO-GUARD
provides resistance to decay and termites. keep in mind, however, that interior
fire retardant treated wood is not recommended for use in damp or wet
conditions, or in contact with concrete or soil.