Structural Insulated SIP Panel Insulation – Part 3. Compare the Foams

SIP panel insulation is offered in several different forms.  In this post, part 3 of a series of 6 on different types of insulation on the market, we discuss the difference between rigid plastic foam insulations.  In the table below we compare various foams R-values, characteristics and advantages and disadvantages to that used in RAY-CORE’s structural insulated panels.  Just one more step in making the decision when purchasing a SIP panel for your next home.

RAY-CORE uses only the best… super insulating closed cell polyurethane foam in their structural insulated panels.  Different than standard SIPs, RAY-CORE panels take the tried and true construction practice of using studs, fills the voids with high R-value foam, adds a radiant vapor barrier all wrapped up in a modular, lightweight panel with superior strength.  If you would like to learn more now about RAY-CORE’s SIP panel, visit our website by clicking the green button to the right of the screen, or phone 877.552.2440

3. RIGID FOAM INSULATIONS
TYPER-VALUEMADE FROM &
CHARACTERISTICS
ADVANTAGESDISADVANTAGES
Expanded Polystyrene
Foam (EPS)
3.5 - 4.35 per inchSmall spherical beads
heated and molded
into insulated panel
form

Similar to the material
used for coffee cups

Open cell foam
* Higher R-value
per inch than
fiberglass
* R-value based on
density
* Good vapor retarder
* If sealed, can
provide air barrier
* Good acoustical
qualities
* Can withstand
flooding
* More expensive
than fiberglass
* Semi-permeable
* Can retain
moisture, cause
adjoining wood rot
and support mold
growth
* Can be flammable
and melt
Extruded Polystyrene
Foam (XPS)
3.8 per inch
(some claim up
to R-5. Recent
EPA changes to
manufacturing
product, much
diminished)
Polystyrene pellets
melted chemically and
injected with blowing
agent to form small
air pockets and
pushed through
shaping die to form
insulation panel

Closed cell foam
* Good R-value per
inch
* Dense - resists
compression,
impact or
deformation
* Stronger than
polystyrene
* Good acoustical
qualities
* Low permeability
* Can withstand
flooding
* More expensive
than fiberglass,
polystyrene or
polyurethane
* Can be flammable
and melt
* Can somewhat
degrade if long-term
exposure to sunlight
Polyurethane Foam7-8 per inch2-part chemical
(biproduct of petroleum)
mixed and injected
with blowing agent to
form small air pockets
and molded to form
insulation panel

Closed cell foam
* Highest R-value
* Dense - resists
compression,
impact or
deformation
* Superior strength
* Provides air barrier
* Good acoustical
qualities
* Low permeability
* No moisture
retention causing
rot or mold
* Can withstand
flooding
* Class 1 fire-rated
* More expensive
than fiberglass,
polystyrene or
polyurethane
* Can somewhat
degrade if long-term
exposure to sunlight
Soy Based (Biobased)
Foam
3.5 - 6.3 per inchNatural polyol that
uses soy in the foam

Closed cell foam
* Good R-value per inch
* R-value based on
density
* Good vapor retarder
* Good acoustical
qualities
* Low permeability
* Expensive
* Few manufacturers
and little availability
RAY-CORE STRUCTURAL INSULATED SIP PANEL
TYPER-VALUEMADE FROM &
CHARACTERISTICS
ADVANTAGESDISADVANTAGES
Polyurethane Foam7 - 8 per inch2-part chemical
(byproduct of
petroleum) mixed
and injected with
blowing agent to form
small air pockets and
molded to form
insulation panel

Closed cell foam
* RAY-CORE
Structural Insulated
Panels made with
high-density
polyurethane
closed cell foam
offers higher R-values
than most SIPs
* Very dense
* Superiorly strong
* Properly sealed,
eliminates air infiltration
* More expensive
than fiberglass or
polystyrene
but good return on
investment with a
lifetime of energy
savings (More R-
value for dollar
spent)

SIP Panel Insulations - Compare the Foams

Leave a Reply