(cont’d on the next page)
when to switch from summer to winter
systems, and what equipment settings
are optimal for each material.
Brian Pedersen, SWD Urethanes: In
general, most experienced contractors
have learned through trials and experi-
ence how to transition fairly well into
colder temperature applications. The
challenge for most applicators is look-
ing through that crystal ball trying to
predict the Canadian weather in their
region to determine when to order win-
ter formulations and then when to make
the switch. The next challenge is to make
the required adjustments not only on the
equipment and processing side, but how
they actually spray. Most cold weath-
er formulations will react quite well if
manufacturers’ recommendations are
followed. For manufacturers, it can be
a production and inventory challenge
just simply due to the vastness of the
Canadian geography and weather. Some
places in the country may be ready for
cold temperature formulations three to
four weeks earlier than others. Some ar-
eas may never have to transition due to
Scott Ruffett, Icynene: In a country
where much of the population is in a heating season for four or five months of the
year, we need to adapt and look for solutions to ensure we can continue spraying
when the temperature drops below zero.
Most Canadian contractors are trained
or have experience in cold-weather applications and can handle most of these
conditions fairly easily. Unfortunately,
the last few years have been extremely
cold, causing many contractors to lose a
considerable amount of production days.
Cold temperatures will affect some proj-
ects more than others. Exterior appli-
cations of medium-density foams need
to be managed differently than interior
applications of light-density foams, as
weather, precipitation, wind speed, and
ambient air temperature need to be con-
sidered before sending the crews out.
Foam contractors quoting work that
might be done during the winter months
must point out to their customers that
there may be a need for heating and/or
hoarding, and that comes with a cost.
Determining who is paying for what at
the quote stage ensures the project runs
smoothly as possible.
Compared to other insulation and air/
vapour barrier products, select SPF products have an advantage and are well suited for cold weather applications. Many of
the competing products as well as adhesives used for board stock insulation materials have cold temperature limitations.
Water-blown light-density foams can be
sprayed down to approximately negative
25 degrees C, while water-blown medium density foams have more flexibility
than chemically blown medium-density
foams in cold temperatures.
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