jot-23
29.01.08, 15:10
okolo 20% wszystkich nowych domkow sprzedawanych w USA to
tzw "manufactured homes" czyli skladane w fabryce, przewozone na
miejsce duzymi platformami i skrecane srubkami w pare dni. w roznych
rozmiarach od tradycyjnych trailerow po wielokondygnacyjne.
While manufactured homes do utilize many of the same building
materials as those used in site-built houses, they also typically
use a significantly higher amount of materials that contain resins -
plastics, acrylics and, in particular, particleboard. Particleboard
is made with resins that contain a form of formaldehyde and is found
in manufactured home sub-floors, underlayment, cabinets, built-ins,
shelving and many other areas. Depending on the manufacturing
processes and materials used, some types of particleboard readily
release the formaldehyde gas into the air as it cures - a process
called "outgassing" - and in tightly closed areas with a lot of
particleboard present, this can gather in high enough concentrations
to affect some people.
As a result, manufactured homes post a warning label that reads, in
part:
"Some of the building materials used in this home emit formaldehyde.
Elderly persons and young children, as well as anyone with a history
of asthma, allergies, or lung problems, may be at greater risk.
Reduced ventilation resulting from energy efficiency standards may
allow formaldehyde and other contaminants to accumulate in the
indoor air."
