Winter Panel Curtainwall Product Data No. C-2.3

General Description

Curtainwall™, manufactured by Winter Panel, is the premier stresskin panel used in timber frame construction today. The product is designed for timber framers seeking the highest levels of quality, dependability, and thermal efficiency. Winter Panel fully stands behind its panels, offering both the most complete warranty protection and the most extensive technical support in the industry.
Winter Panel Curtainwall is an isocyanurate-core stresskin panel with O.S.P. as the outer skin and drywall as the inner skin. Panels are manufactured in a continuous lamination process in which the foam directly bonds to the skins, providing the highest strength bond possible. The high-density isocyanurate insulation (an advance formulation of urethane) provides very high insulation levels (R-25 for the 4-9/16" thick panels) and excellent fire safety characteristics. Curtainwall panels provide more insulation than 9" of fiberglass or 6" of 1-lb density expanded polystyrene (EPS), yet at an overlap thickness of only 4-9/16".

Application
Winter Panel Curtainwall is used primarily for enclosing timber-frame buildings, providing both wall and roof systems. Wall panels rest on the sill or floor deck and are generally applied vertically, with dual 5/8 x 3" plywood splines uses to join panels. Because "blueboard" is used as the inner skin, rather than standard gypsum drywall, the interior can either be taped and finished like standard drywall, or skim-coated, producing a superior wall finish.
Unlike in-fill walls used with conventional timber framing, there is no cutting and fitting required around posts, girts, and corner braces with Curtainwall. The entire stresskin wall system is outside of the timber frame.
Roof panels can be run either perpendicular or parallel to the roof ridge, depending on whether a rafter or purlin roof framing system is employed by the timber framer. Unsupported roof joints are joined with the same 5/8 x 3" splines. A wide variety of roof trim details can be employed with Curtainwall to suit the desired architectural style. Complete installation details for timber frame applications are available in the Timber Framer's Guide to Stresskin Panel Installation.

DIMENSIONS AND PHYSICAL PROPERTIES

OUTER STRUCTURAL SKIN: 7/16" Oriented strand board (OSB), a high-quality exterior-rated, wood composite board.

INNER SKIN: Identical to outer skin.

INSULATION CORE: 3-5/8" polyisocyanurate, a minimum 2-lb/ft³ density, Class I, closed-cell foam. The foam insulation contains no formaldehyde or formaldehyde-related chemicals.

ADHESION: An extremely strong and durable bond between foam and skins is provided by the continuous lamination manufacturing process with injected foam expanding against the two skins under pressure.

DIMENSIONS AND WEIGHT: Overall Thickness	4-9/16", 5-9/16", 6-9/16"
Thickness Tolerance	± 1/16"
Width	48"
Width Tolerance	+0 -1/8"
Standard Lengths (ft)	8, 9, 10, 12, 14, 16, 1B, 20, 22, 24
Length Tolerance	+0 -¼"
Weight	3.75lb/ft²
THERMAL PERFORMANCE:	Minimum R-value 25 [Ft²r°F/Btu] (aged 12 months)
WATER VAPOR PERMEABILITY:	Between 1 and 3 perms.
FIRE SAFETY:
WALL FINISH RATING	22.5 minutes (ASTM E-119). Exceeds 15-minute finish rating standard for light construction.
FOAM FIRE RATING	Class I
SMOKE DEVELOPED	300 (ASTM E-84)
FLAME SPREAD	25 (ASTM E-84)
STRUCTURAL INTEGRITY IN FIRE CONDITIONS	Isocyanurate foam is a "thermoset" plastic. It retains its structural integrity until completely consumed by fire. Melting does not occur.
TOXICITY OF COMBUSTION PRODUCTS	Dangerous gasses may be given off in a fire. Combustion products are similar to those produced by burning wood.

Allowable Transverse Loading Curtainwall Panel Pounds/square foot at L/240 deflection. Spans to right of line (7'-10') for wall use only.
Span	2'	3'	4'	5'	6'	7'	8'	9'	10'
3½" Core	81.1	52.1	37.3	28.2	22.0	17.5	14.2	11.6	9.6
4½" Core	103.1	65.9	46.7	34.9	26.9	21.2	17.0	13.8	11.3

STRUCTURAL DESIGN GUIDELINES:
Roof spans: Unsupported horizontal shall not exceed 4 ft. All unsupported joints in roof panels shall be joined with dual 5/8" x 3" splines as specified in the Winter Panel Corp. Timber Framer's Guide to Stresskin Panel Installation.

Wall spans: Unsupported vertical spans shall not exceed 8 ft. unless panels are secured to vertical posts along the wall. For additional design loading information, contact the company. All unsupported wall joints shall be reinforced with either dual 5/8" x 3" or 2 x 4 splines as specified in the manual.

WARRANTY AND CODE COMPLIANCE: Winter Panel Curtainwall panels come with a ten-year warranty covering defects in materials and workmanship. For complete warranty information, contact the company. Panels have been thoroughly tested for structural properties, R-value, fire safety and durability by independent testing laboratories. Test results are available upon request.

CODE COMPLIANCE:
Rhode Island Building Code Standards Committee (see Report #83-150).
New York State Fire Prevention and Building Code Council (Certificate of Acceptability No. 529-85-M & MC).
Meets Massachusetts Building Code Requirements.

FOR MORE INFORMATION: For additional information on any other Winter Panel stresskin products and applications, please go to the form.

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