R-Valued Homes (RVH) SIP buildings are manufactured and fabricated exclusively with polyurethane (PUR) foam because of its superior qualities over expanded polystyrene (EPS) foam, for example:


  • PUR foam has double the R-value per inch of thickness (PUR –R8 @20°F v. EPS –R3.85).
  • PUR foam has a Class 1 fire rating with a flame spread of 25 and smoke spread of 350.  PUR will not burn without a continuous flame exceeding 750°F; at lower temperatures it will only char.  However, EPS will melt at temperatures ranging as low as 180°F to 240°F.
  • PUR is closed cell foam and is impervious to moisture with a perm rating of less than one (1) which classifies it by definition as a vapor barrier; however, EPS is open celled foam and will absorb up to 4.3% of its volume in moisture.
  • PUR foam is not a volatile organic compound (VOC) and therefore does not contribute to ozone depletion whereas, Styrene, a chemical component, of EPS has been added to US Health Dept. list of carcinogens.
  • PUR foam will not support mold and mildew.
  • PUR foam does not contain any formaldehyde.
  • PUR foam does not support nesting by vermin’s.
  • PUR foam SIPs qualifies as a LEED/ GREEN building product.
  • PUR foam is glue with superior adhesion and excellent tensile strength.


RVH energy efficient SIP building provides the home owner or builder with a multitude of benefits and at its most basic level provides the Cadillac of Insulation.  RVH SIP buildings are proven to be energy efficient, environmentally friendly and are changing the face of construction throughout Alaska and the Yukon.


Moisture is easily one of the biggest concerns for builders and homeowners.  A home that has excess moisture will promote the growth of biologic pathogens such as molds, mildew, fungi, and bacteria. The challenge homeowners face with moisture problems is that they are not always visible to the naked eye.  Condensation may form inside wall cavities where vapor barriers have failed or were incorrectly installed, creating the ideal environment for decay and mold growth, not to mention structural damage. This can lead to upper respiratory problems, asthma, and potential allergenic reactions.


RVH exterior SIP envelope prevents the silent absorption of moisture through the panel membranes. Polyurethane foam SIPs has a perm rating of less than “1” and is a moisture barrier; therefore, moisture absorbed by the panel skin is drawn out by the warmer surface temperature.  Homeowners can rest assured their home is dry, free from mold, mildew, and possible structural damage. A dry home is a healthy home.



Building homes with your health and safety in mind is the first step in creating healthy housing. On average, people spend as much as 65% of their time in their homes. The home can be both a safe haven for its occupants or a source of sickness and discomfort. Indoor air quality can greatly affect your health and is influenced by a number of factors: the moisture content in the home, ventilation system, chemicals, construction materials, and the cleanliness of the home.


Moisture levels are the number one problem in many homes. The level is affected by the building materials used in the construction process, as well as the number of occupants and their activities in the home. Maintaining an optimum relative humidity range between 30 and 45 percent will prevent the growth of mold, dust mites, bacteria, fungi, viruses and lower the rate at which chemical off-gassing occurs from materials in the home. An adequate ventilation system will ensure a good flow of fresh air into the home, expelling stale and polluted air, and maintains the right moisture balance in the home.


The type of furnishings and finishes used in the home can greatly affect the quality of your indoor environment. Select products that are environmentally friendly, easy to clean, and low in volatile organic compounds (VOC).  Selecting no or low VOC paint can reduce the amount of chemical emissions, while smooth surface floors will not harbor dust and other allergenic particles. Some other small steps; such as turning off lights, showering rather than taking baths and recycling all add up over time. For every small improvement you make to your home, you will recognize improvements in your health, comfort and your wallet.


The benefits of R-Valued Homes are easy to see!   Energy efficiency - Structural strength - Healthy home - Cost savings - Environmentally friendly





Your decision to build with RVH energy efficient SIPs, will not only save you money, but also allows you to do your part for the environment as well.  SIP skins  can be manufactured with oriented strand board (OSB), a construction material made from fast-growing trees can be renewed quickly. Use of slow growth forest lumber is reduced by at least 50% as compared to traditional framing.  The exterior envelope (walls and roof) of SIP constructed buildings can reduce the amount of lumber used on a typical 1200 sq. ft. house by 50 percent or more.  Homeowners and builders are becoming increasingly aware of the need to make changes in the way we build our homes to create a "greener" world. The bulk of the changes can be made during the construction phase, but the subtle changes made in our everyday lives can amount to huge gains in safeguarding our environment.


The key to creating sustainable housing is started with the right material. Consider the type of building materials used in the construction of your home. Are you using traditional framing? Is the construction material made from pressed wood products such as particleboard or fiberboard? Traditional stick framing tends to create more organic waste as excess wood is thrown away.   Use of rapid growing woods and renewable softwood like spruce and maple or engineered wood products (EWP) will relieve the pressure placed on more environmentally sensitive old-growth resources.


Framing your exterior walls using RVH SIPs will increase the R-value of your home while reducing both the amount of lumber and the energy used. Products that are good quality, low maintenance, durable and enduring in design will reduce future renovation costs and stress on the local landfills. The decisions you make today will greatly affect the world around you, tomorrow and in the future.



Did you know you can reduce your energy costs by up to 50 percent by building with RVH SIPs?  RVH SIP homes provide a greater insulating value and reduced air infiltration than one built with conventional framing.  Traditional framing with wood studs act as thermal bridges whereas; RVH SIP walls create a continuous wall of insulation, ensuring your home is comfortable year round.  Building an energy efficient home is more than just installing a 90%+ efficient furnace or boiler.  Energy efficiency is achieved by combining a well-insulated tight building envelope, thermo-pane windows, insulated doors and a properly designed and installed mechanical system.  Building an RVH SIP home reduces the size of the heating equipment resulting in an immediate cost savings; thereafter, these energy savings keep paying you back month after month, for as long as you own your home.



Phone : 907•357•2769

Fax  : 907•357•2770


Phone : 907•357•2769

Fax  : 907•357•2770