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| Custom-designed True Panels by Yankee Barn Homes |
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Q. What are Yankee Barn True Panels?A. True Panels are structural wall and roof panels manufactured by Yankee Barn Homes in its climate controlled shop under strict Quality Assurance oversight. True Panels are a key component in the Yankee Barn prefabricated building enclosure. The True Panels themselves are built with: 1. Sustainable Forest Initiative approved, kiln dried lumber, 2. Polyisocyanurate foam insulation sealed in place with a bead of expanding foam. 3. 5/8” CDX plywood sheathing. The panels are custom designed for each home and include full structural, framed openings for all doors, and most windows are installed. There is a 1 ½” space from the face of the insulation to the inside of the studs leaving very good and easy access for your electrician to do his wiring without disturbing a lot of the insulation. The True Panel System is extremely strong, energy efficient and cost effective, saving you time, money and labor. Q. What are SIPS?A. SIPS, an anachronism coined by the foam core wall panel industry meaning Structural Insulated Panel, consist of various thicknesses of foam insulation sandwiched between an inner and outer sheet of ½" OSB (Oriented Strand Board or "Chip Board"). Three types of foam are used, with widely varying R values and are commonly joined to the OSB with adhesive. Q. The Ten Advantages of True Panels over typical SIPs are:1) True Panels have lower sound transmission properties than SIPS. 2) True Panels offer total design and integration of the home shell construction with your floor plan and timber frame. Each panel is designed and built with all windows, doors, or sky light structural openings included at no additional charge. 3) Remodeling or reworking of your walls and roof at any time is much easier with True Panels. Moldings, Window casings, stairs and cabinets can be fastened to solid framing for superior holding, compared to the ½ OSB on the SIPs. Carpenters and other subcontractors appreciate the familiar construction they find in the True Panels that makes the costly specialized tools or procedures required for SIPs unnecessary. 4) True Roof panels are designed and constructed with a full roof vent from eave to ridge, eliminating the need for the additional framing and sheathing that has to be site installed over basic SIP roof panels. 5) In most cases, the Customer’s windows are factory installed into the True Panel wall using the very latest manufacturer recommended installations techniques which reduces air infiltration and creates a better water barrier. 6) TRUE Panels are built with Polyisocyanurate insulation, which provides an R value approximately 50% higher than the best selling SIP foam core. In addition, the True Panel insulation is foil faced on both sides, which is highly effective at reflecting radiant heat. This is especially advantageous during hot, summer days. 7) The 5/8" CDX sheathing used on the True Panel roof and wall panels, by standard design, provide superior lateral bracing, putting them a step ahead when high wind, heavy snow loads or seismic activity are part of the local building code requirements. 8) The True roof panels are manufactured with the ventilation space already in place, unlike basic SIPs. Thus, the True Panel provides a cold roof rather than a warm roof. This is of interest in terms of ice build up which is sometimes formed with warm roofs. Also, most asphalt shingle manufacturers will not offer or will reduce their basic warrantees, if their shingles are not installed over a well ventilated roof system, also known as a "Cold Roof" system. 9) True Panels create less on-site job waste than basic SIPs because these SIPS require cutting to fit and cutting for window, door and skylight options. 10) High wind or seismic heavy duty hold-down are easily installed in True Wall Panels; basic SIPs in many case will require adding stud framing within the panel.Q. What do the two systems have in common?A. Ease and speed of construction on-site makes it possible for buildings to be placed under roof within days rather than weeks. This is very important when there is timber frame to enclose or where good building weather is in short supply. Both systems are highly resistant to wind damage, and suitable for areas with wind shear or seismic stressors. The thermal performance of both systems may significantly reduce costs for heating and air conditioning, one of the major expenses of home ownership. An air exchanger is recommended for both systems. With no air penetration, allergens and dust do not constantly come into the home or building. Reducing allergens and dust in the interior of the home make for a healthy atmosphere indoors, where we typically spend 80% of our time. Both systems may help you qualify for LEED certification and energy tax credits or utility company credits. * A third type of SIP not covered here is a Steel framed SIP Q. Apple to apple, how do the two systems compare in terms of Wall Panel R Value?
A. The basic True Panel wall is six inches thick and has an R value of 25.2 including sheathing. The basic SIP has is 4 ½ inches thick and an R value of about 14.4 including sheathing. The next step up in True Panel line is a six inch thick wall with 5" of insulation and has an R value of 31.7. The next step up with SIPS is a six inch thick wall with an R value of 29.5.
A. The basic True Roof Panel is seven and ½ inch thick and has an R value of 30.7. The basic SIP panel used in roofs is 8 ¼ inch thick SIP has an R value of 27.9. The 9 ¼ True Roof Panel has an R value of 36.6 while the ten inch thick basic SIP panel ha an R value of 35.1. The True Panel can be manufactured with up to 51.2 R value, but we believe that the law of diminishing returns kicks in at about an R value of 35.1. Q. R-Values of the True Wall Panels compare to the most widely used SIP panels?A. All True Wall Panels are 6" thick with various thicknesses of insulation. The thickness of SIPs’ is the thickness of the insulation plus 1" OSB.
Q. How do the insulation* and R-values of the True Roof Panels compare to the most widely used SIP panels?A. True Roof Panels will be either 7 ½" or 9 ¼" thick**. The True Panel can be manufactured to an R-51.2, but studies have shown that the law of diminishing returns kicks in at about an R value of 35.1. The SIP will be 1" thicker than the foam core specified.
Do you have ICC approval for True Roof Panels?
Yes, and as far as we know we have the only approval which includes wood ceiling as an option.
A.
*True Panel is Polyisocyanurate insulation. SIP panels are Expanded polystyrene (EPS)
**True Roof Panel thickness includes vent space above the insulation
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Pages Yankee Barn True Panels Compared to SIPs 