SPRAYFOAM Professional - Fall 2017 - 28

with properly pre-conditioned materials. Other than potentially damaging
the chemicals, attempts to rapidly heat
the chemicals can mean inconsistent
warming. The chemicals may end up
hot in one area of the drum or tote, but
not another.
Then there are the ratios related
to proportioning. "The industry has
tools and a calibration method that not
everyone follows," he said. "I do training
all the time, and I always ask, when I
start the training, how many of them
can tell me what the ratio was on their
last job. No one ever raises their hand.
Sometimes, the way an installer finds
out that the ratio was off is when he has
to order an extra drum of A or B because
one side was empty before the other."
By that time, there's a lot more work to
go back and fix than there would need
to be if they were paying more attention
to ratios on the job site.
"You should be checking the output
ratio of the equipment regularly," Fennell
said. "What a lot of people argue is that
the pump is a positive displacement

pump, so it can't go off ratio. Well, it
can." And he has the photos from past
installations to demonstrate it.
In addition to ensuring chemicals are
the right temperature in the drum, it's
important to make sure they're heated
between there and the gun, too.
Fennell also recommends performing
strip tests to check that the processed

You should be checking the output
ratio of the equipment regularly,"
Fennell said. "What a lot of people argue is
that the pump is a positive displacement
pump, so it can't go off ratio. Well, it can."

28 SPRAYFOAM PROFESSIONAL |

Fall 2017

product is a uniform shape and color
before the installation starts.
Many in the industry say that a
qualified installer will be able to tell if
any of the processing parameters are
not being met, but that's not always
the case.
Diagnostic equipment can be added
to the proportioner to verify everything
is as it should be, Fennell said, but this
equipment is more often sold to OEM
molded foam manufacturers than to
those who process spray foam in the
field. Their reasoning, he said, is that
it would make field pumps more expensive, "and represent a competitive disadvantage to the SPF contractor."
One other potential issue is industry
documentation. Most foam manufacturers require a 1:1 ratio of A to B in their
recommended processing parameters.
When asked about the allowable deviation, they maintain that they are requiring a zero tolerance, Fennell said. He
has yet to test a machine that processed
foam at exactly 1:1.
"Theoretically, when foam manufacturers do not give a tolerance, those
products cannot be done properly by
the installer.... You have to know how
far off you can be and have the foam of
acceptable quality."
Here, Fennell recommends that
installers choose products that do
include a tolerance, so this critical
foam quality processing parameter can
be verified. Otherwise, if the installer
won't change brands, "then the parties
involved need to agree on the allowable tolerance before the work starts,"
he said. "You have to set a standard."
As for installing the foam, issues
here may be related to technique; to
environmental responses; or to other
details such as substrate compatibility and/or preparation and failure to
address release/de-bonding materials
in the assembly or thermal hazards.
Regardless of the issue-or whether
it's one related to processing or installation-the good news is that installers
don't have to go it alone. In addition
to professional resources such as the
Spray Polyurethane Foam Alliance and
its Professional Certification Program
(SPFA PCP), further training and consultation are available. o



Table of Contents for the Digital Edition of SPRAYFOAM Professional - Fall 2017

Executive Director’s Corner
President’s Post
Foam Business News
Spfa Today – Membership News & Numbers
Legislative Update
Verdical Group’s 4th Annual Net Zero 2017 Conference: Energy + Water + Waste
An Expanding Business: Spray Foam Offers Interesting Opportunities for Sidelines
Can It Be Saved? Common Spray Foam Issues From Processing and Installation
The Evolution of the PCP Modifications and Improvements Through the First Five Years
2017 SPFA Contractor Awards
Discipline, Passion and Grit
Ask the Expert
Upcoming Events
Index of Advertisers | advertisers.com
SPRAYFOAM Professional - Fall 2017 - intro
SPRAYFOAM Professional - Fall 2017 - cover1
SPRAYFOAM Professional - Fall 2017 - cover2
SPRAYFOAM Professional - Fall 2017 - 3
SPRAYFOAM Professional - Fall 2017 - 4
SPRAYFOAM Professional - Fall 2017 - 5
SPRAYFOAM Professional - Fall 2017 - 6
SPRAYFOAM Professional - Fall 2017 - Executive Director’s Corner
SPRAYFOAM Professional - Fall 2017 - 8
SPRAYFOAM Professional - Fall 2017 - President’s Post
SPRAYFOAM Professional - Fall 2017 - 10
SPRAYFOAM Professional - Fall 2017 - 11
SPRAYFOAM Professional - Fall 2017 - Foam Business News
SPRAYFOAM Professional - Fall 2017 - 13
SPRAYFOAM Professional - Fall 2017 - Spfa Today – Membership News & Numbers
SPRAYFOAM Professional - Fall 2017 - 15
SPRAYFOAM Professional - Fall 2017 - 16
SPRAYFOAM Professional - Fall 2017 - Legislative Update
SPRAYFOAM Professional - Fall 2017 - Verdical Group’s 4th Annual Net Zero 2017 Conference: Energy + Water + Waste
SPRAYFOAM Professional - Fall 2017 - 19
SPRAYFOAM Professional - Fall 2017 - An Expanding Business: Spray Foam Offers Interesting Opportunities for Sidelines
SPRAYFOAM Professional - Fall 2017 - 21
SPRAYFOAM Professional - Fall 2017 - 22
SPRAYFOAM Professional - Fall 2017 - 23
SPRAYFOAM Professional - Fall 2017 - 24
SPRAYFOAM Professional - Fall 2017 - 25
SPRAYFOAM Professional - Fall 2017 - Can It Be Saved? Common Spray Foam Issues From Processing and Installation
SPRAYFOAM Professional - Fall 2017 - 27
SPRAYFOAM Professional - Fall 2017 - 28
SPRAYFOAM Professional - Fall 2017 - 29
SPRAYFOAM Professional - Fall 2017 - The Evolution of the PCP Modifications and Improvements Through the First Five Years
SPRAYFOAM Professional - Fall 2017 - 31
SPRAYFOAM Professional - Fall 2017 - 2017 SPFA Contractor Awards
SPRAYFOAM Professional - Fall 2017 - 33
SPRAYFOAM Professional - Fall 2017 - 34
SPRAYFOAM Professional - Fall 2017 - 35
SPRAYFOAM Professional - Fall 2017 - 36
SPRAYFOAM Professional - Fall 2017 - 37
SPRAYFOAM Professional - Fall 2017 - Discipline, Passion and Grit
SPRAYFOAM Professional - Fall 2017 - 39
SPRAYFOAM Professional - Fall 2017 - 40
SPRAYFOAM Professional - Fall 2017 - 41
SPRAYFOAM Professional - Fall 2017 - 42
SPRAYFOAM Professional - Fall 2017 - Ask the Expert
SPRAYFOAM Professional - Fall 2017 - 44
SPRAYFOAM Professional - Fall 2017 - Upcoming Events
SPRAYFOAM Professional - Fall 2017 - Index of Advertisers | advertisers.com
SPRAYFOAM Professional - Fall 2017 - cover3
SPRAYFOAM Professional - Fall 2017 - cover4
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