Isolate
Construction in Occupied Buildings
to Protect Occupants
Isolate
construction zones in occupied buildings using
airtight barriers and separate ventilation systems.
Barriers
can be made from heavy tarpaulins, plastic sheet
(6 mil min.) or solid panels; all joints should
be securely taped and tarpaulins and plastic
protected from damage. Provide temporary “airlock”
type double doors between occupied and construction
zones if passage is necessary.
Where
possible, seal all HVAC supply and return points
in the construction zone (consult a mechanical
specialist). Provide separate construction zone
ventilation with temporary fans and ducts that
always maintain lower pressures in construction
zones relative to occupied areas. Portable high-volume
exhaust fans, with flex-duct to the outdoors,
are especially useful where finishes, solvents,
adhesives and other toxic materials are used
or dust is generated.
Some
construction isolation is generally part of
good management practice. Being thorough has
excellent returns in terms of both occupant
satisfaction — and avoidance of liability.
Cautions
- Take
care when sealing HVAC systems serving both
construction and occupied zones to ensure
they work properly during and after construction.
