Phone: (907)357-2769



Solutions for Energy Efficiency

Made In Alaska logo with polar bear and cub


2.3 lb/cf

21 psi

35 psi

53 psi

32 psi

>25 psi

> 91

2.1 perm

0.0063% g/cm3

-0.4% 28 days@ -20°F

 -0.4% 28 days@ 200°F

 8.1% 28days@158°F-95% RH







25 Sample thickness 6”

350 Sample thickness 6”

UL Class – 1


Physical properties for foamed-in-place 2-part polyurethane mixture meeting the following criteria:

Core density nominal (ASTM D-1622)

Compressive resistance at yield (ASTM D-1621)

Flexural Strength (ASTM C-203)

Tensile Strength (ASTM D-1623)

Shear Strength (ASTM C-273)

Substrate adhesion (ASTM D-1623)

Closed Cell Content, % (ASTM D-2856)

Water vapor permeance of 1" thick, max (ASTM E-96)

Water absorption by total immersion, max. (ASTM C-272)

Dimensional stability (change in dimensions), max. (ASTM D-2126)

Dimensional stability (change in dimensions), max. (ASTM D-2126)

Dimensional stability (change in dimensions), max. (ASTM D-2126)

K-Factor,²- °F at mean temperature 20°F (ASTM C-518)

K-Factor, BTU. In/hr-sf²- °F at mean temperature 55°F (ASTM C-518)

K-Factor, BTU. In/hr-sf²- °F at mean temperature 75°F (ASTM C-518)

R-Value, BTU. In/hr-sf²- °F at mean temperature 20°F (ASTM C-518)

R-Value, BTU. In/hr-sf²- °F at mean temperature 55°F (ASTM C-518)

R-Value, BTU. In/hr-sf²- °F at mean temperature 75°F (ASTM C-518)

Flame Spread (ASTM E-84)

Smoke Density (ASTM E-84)

Flammability Rating (ASTM E-84)


What type of foam is used for Alaska Insulated Panels (AIP)?

AIP SIPs are manufactured with specific mixture of resin and isocyanates polyurethane (PUR.  This manufacturing process creates one of the highest insulating R-value per inch of all the commercially available products on the market.  PUR foam maximizes efficiency, space usage and reduces heating and cooling costs by up to 50%.  Polyurethane foam was originally developed as a replacement for rubber and dates back to the beginning of World War II. Today, PUR foams can be found in virtually everything we touch, from footwear and clothes to upholstered furniture.




























What types of skins can be used with PUR SIPs?

PUR SIPs can be made with virtually any type or combination of skins so long as they have square cut edges and are structural rated when required.  Some of the most common skins used are OSB, plywood and pressure treated plywood (PWF), Drywall ½” standard, type 'C', or 5/8" type 'X' and sheet metal may also be used. As a standard AIP SIPs are manufactured with CDX plywood skins.


Will skins separate from the PUR foam?

The unique process used in manufacturing polyurethane foam-core SIPs eliminates the need to use additional laminates or glues to attach panel skins to the foam.  Through the process known as rapid injected mold (RIM) or liquid shot mold injection; the polyurethane foam (which is a glue) impregnates the actual fibers of the skin material, creating a bond of incredible strength.


What applications are PUR SIPs used?

PUR SIPs are versatile and can be used for the total insulated building envelope including below grade foundation and frost wall applications, insulated floors, walls, roofs and cantilevered soffits.


Are PUR SIPs strong and durable?

PUR SIPs have structural characteristics that are similar to an I-beam making them four times stronger than conventional stud walls. When under pressure or stress the skins are in tension and compression, while the polyurethane-core resists shear and buckling.


Do PUR SIPs replace stick frame construction?

Yes.  PUR SIPs become the structural component of the building envelope including window & door openings.  When used for insulated floor and/or roof applications structural joists, purlins and/or trusses need to be installed to accommodate specific geographical loading, i.e. seismic, wind and snow requirements.


Why are PUR SIPs a superior alternative to traditional insulation?

PUR SIPs provide superior and uniform insulation in comparison to traditional insulation methods of building construction. PUP SIPs provide a more airtight structure which means fewer drafts, eliminates thermo bridging; lower energy bills and less noise; essentially a more comfortable living and working space for the entire family.


Are PUR SIPs safe for my family, friends and the environment?

Yes! PUR SIPs qualify for Green building projects; as well as Energy Star rated construction, which is a government sponsored program that helps promote high levels of energy efficiency.


Are PUR SIPs easy to install?

Yes! Quick and easy installation can be achieved with the use of standard construction tools.


How are PUR SIPs joined together?

The PUR RVH SIPs are joined by either two strips of plywood called surface "splines" or by dimensional 2X lumber.  The type of spline used will be determined by properties such as wind, weights and seismic forces.


How are windows and doors installed in PUR SIPs?

Rough openings for windows and doors are provided during building fabrication.  On site, installation of windows and doors are according to the specific manufacturer's instructions.


How do you install electrical wiring and plumbing in PUR SIPs?

AIP fabricates; vertical "electrical chases” and cutouts for boxes as determined by the electrical wiring plans provided.  Traditionally, plumbing is kept within the interior walls and floors of your home. Installing island vents or loop vents are also a common practice and can be found in plumbing codes.


How do you attach siding to PUR SIPs?

Application of siding should be in accordance with the specific siding manufacturer's instructions including weather barrier and fastening. Typically, the frequency of fastening increases to 12" on center.


How do PUR SIPs protect against moisture?

PUR foam has a perm rating of less than 1 and is water resistant.Therefore, it will not allow any type of moisture to penetrate the panel.  Properly sealing of all panel joints during construction is required.


What is "off gassing" and does this occur with PUR SIPs?

Off gassing is the release of chemicals from non-metallic substances under ambient or greater pressure conditions. Off gassing can be related to what's popularly known as the "new car smell."  Cured rigid polyurethane foam products do not release VOC's and when encapsulated between two skins and not exposed to atmosphere conditions off gassing cannot accrue.


How do PUR SIPs perform in a fire?

Polyurethane foam as used in SIPs is UL class “1” rated and has a flame spread number less than 25 and a smoke developed number less than 400.  Polyurethane is a cross-linked thermoset plastic that is highly resistant to heat, capable of withstanding temperatures of 800 ºF (427 ºC).  When exposed to high temperatures, the polyurethane foam only chars, it does not melt.  In residential applications, building codes require that the interior surface of all foam products must be covered with a 15 minute thermal barrier.


Are PUR SIPs toxic in a fire?

Polyurethane foam is organic; the major toxic material when burned is the same as any organic material, Carbon Monoxide and Carbon Dioxide.


What is the cost of PUR SIPs per square foot?

AIP SIP buildings are engineered to specific building plans and geographic load (snow, wind & seismic) requirements; therefore, the cost per square foot is a variable.  The superior insulation performance of PUR SIP allow for thinner walls, which means increased living space when compared to conventional buildings that have the same exterior dimensions.  To get a free estimated cost for your specific plan please  visit our contact page or call Alaska Insulated Panels at 1-907-357-2769.


How are PUR SIPs manufactured?

AIP SIPs are manufactured using the latest state-of-the art equipment, by placing two (2) structural rated skins in a specifically designed mold.  The mold is placed in a hydraulic press and injected with a 2-part polyurethane (PUR) liquid.  Once mixed and injected it becomes foam and expands up to 50 times its volume in about 8 seconds, generates up to 15 pound per square inch of pressure and temperatures in excess of 300⁰F.  During the curing process the hydraulic press counters the generated forces of the foam and maintains the desired panel thickness while the pressure and heat impregnates the foam into the fibers of the skins creating a bond that is almost indestructible.  Once the foam has bonded and fully cured it becomes a thermal set closed-cell plastic that will not melt and has incredible structural strength.


What is the difference between PUR and Expanded Polystyrene (EPS) SIPs?

Comparing shot injected polyurethane molded SIP to an EPS glued sandwich SIP is akin to comparing apples and oranges.  The difference in the technology and thermal performance of the foams used is like night and day.   For example; PUR SIPs are shot injected with liquid PUR.  The heat and pressure created by the foam as it cures impregnates into the fibers of the interior and exterior skins.  Polyurethane foam core SIP is a two component molded panel; whereas, an EPS SIP is a three component sandwich panel.  Polyurethane is also glue and is often the glue used by EPS manufactures for gluing their sandwiched panels.  SIPs like all manufactured products are only as strong as its weakest link.  The more components used in manufacturing process increases the risk for weak links.  All buildings constructed in northern cold climates regions like Alaska have movement, be it from seismic (earth moving), wind pressure (lateral), thermal expansion or contraction (heat/cold) and differential settling (ground/soil).  The weakest link of the EPS SIP is the glued joint, and over time this joint will fail.


What is AIP SIP warranty?

AIP PUR SIPs have a 20-year limited warranty that provides comprehensive coverage from defects in the manufacturing, materials and workmanship.


Are AIP SIPs made in Alaska?

Yes, AIP SIPs are manufactured and fabricated in Wasilla, Alaska.  Everyone is invited to tour our plant; just call 907-357-2769 to make an appointment.




© 2015 Alaska Insulated Panels

Website Design by Kyle Muslin