SPRAYFOAM Professional - Summer 2013 - (Page 34)
ASK THE EXPERT
BY SPFA’S CONSULTANT COMMITTEE, MASON KNOWLES, ROGER MORRISON, PHIL ROBARGE,
JOHN HATFIELD, ROB SMITH
PFA gets calls regularly from customers, designers, architects and others looking for straight answers to their questions on SPF. Here is a question received
recently that our panel of experts addressed:
What do I need to mask off when spraying
foam inside a building? What techniques,
tools and procedures should I use for
masking and trimming?
Industry best practices recommend
that any item within the building that
is not to be sprayed with foam, be protected against overspray or removed
from the spray area.
For example, in an attic you might
find boxes, garment bags, sporting or
hunting equipment, rugs, furniture and
other objects. These should be removed
from the spray area.
Items that can’t be moved and, therefore, masked include: pipes, lighting
fixtures, vents, HVAC equipment and
ductwork, electric boxes and receptacles
and floors. It is not typical to mask roof
joists, beams, rafters, or trusses unless
they will be exposed to the interior living spaces.
Tape, rolls of construction paper,
polyethylene and aluminum foil make
good masking materials. Use masking
materials that will stay in place during the spray operations, but are easily
removed. Sometimes that might mean
using a painters tape with a roll of construction masking paper. Other times
you might need to use a strong PVC duct
tape and 4-6 polyethylene plastic.
Consider also how difficult the item
is to mask. A good masking material
for odd shaped items close to the spray
surface is aluminum foil. The foil can
mold itself around the object, minimizing and simplifying the masked area.
Rules for Masking
1. Move items that can be moved.
2. Mask items that can’t be moved.
3. Mask only objects and areas you do
not want foam on, do not mask into
This cluttered attic was a challenge to mask (above),
but the applicator was able to keep overspray off
everywhere except where the foam was specified.
On the other hand, this applicator (below) decided
to just spray without overspray protection. While
the foam quality was good, the client questioned
the workmanship based on the overspray.
Tape, paper and plastic are the most common masking materials.
34 SPRAYFOAM PROFESSIONAL |
Table of Contents for the Digital Edition of SPRAYFOAM Professional - Summer 2013
Executive Director's Corner- The Hose to Nowhere
President's Post - Feast, Famine ...& Friends!
Foam Business News
Safety First - Effect of Ventilation Rates on Applicator Exposure During SPF Application
Checklist - How to Reduce Exposures During SPF Application
Legislative Update - The Immigration Reform and Construction
Behind The Foam - Rob Tollen and George Tollen: Selling a Product They Believe In
2013 SPFA Contractor Awards
Ask the Expert - Perfecting Your Masking and Trimming
Index of Advertisers
SPRAYFOAM Professional - Summer 2013