ShadowLine Insulated Wall Panel

ShadowLine is an insulated metal wall panel made by Green Span Profiles. It is built for exterior walls and is used on commercial, industrial, low-temperature and cold storage buildings. It belongs to the family of insulated metal panel roofs and walls.

Five flutes, each ¼" deep, run along the exterior face. A 1¼" reveal hides the side joint. The result is an aesthetic, monolithic look.

The Green-Lock side joint gives a high-performance vapor seal. The core is continuously poured-in-place polyisocyanurate insulating foam, bonded between a steel exterior facer and a steel interior liner.

One panel width is made. Each panel covers 42 inches of wall. Thickness, length and steel gauge vary by version.

• Coverage width: 42-inch
• Thickness: 2, 2.5, 3, 4, 5, 6 or 8-inch
• Length: 8'-0" to 75'-0"
• Exterior gauge: 26, 24 or 22
• Interior gauge: 26

The exterior face comes in three gauges. The interior liner is 26 gauge. A thicker panel carries more foam between the two steel faces, and the profile depth runs from 2 inches to 8 inches across the range.

The exterior substrate is Galvalume. The interior substrate is Galvalume or stainless steel.

• Exterior finish: siliconized polyester or low-gloss PVDF
• Interior finish: polyester, siliconized polyester or plastisol (PVC)
• Exterior texture: embossed or smooth
• Interior texture: embossed or smooth

The joint is a Green-Lock offset double tongue-and-groove. The 1¼" reveal covers this joint.

The foam core tested at 90% or more closed cells (ASTM D6226). Apparent density is 2.25 pcf (ASTM D1622).

Thermal transmission by the heat flow meter method (ASTM C518) gave a K-factor of 0.139 BTU-in/hr-ft²-F° at 75° mean and 0.129 BTU-in/hr-ft²-F° at 35° mean.

Air leakage (ASTM E283) measured 0.0011 cfm/sf at 20 psf. Water penetration (ASTM E331) was zero at 20 psf.

Core strength results for the foam:

• Shear strength: 16 psi (ASTM C273)
• Compressive strength: 18 psi (ASTM D1621)
• Tensile strength: 21 psi (ASTM D1623)

Each of these figures is for the foam core alone. Bond between the foam and the steel faces was tested four ways.

• Fatigue endurance: 2,000,000 alternating cycles of L/180 deflection left no facer or liner delamination, no fracture of the foam core and no permanent set.
• Freeze/heat cycle: twenty-one 8-hour cycles from –20° F to 180° F left no delamination, blistering or permanent set.
• Humidity endurance: 1,200 hours at 93% humidity and 158° F left no delamination, blistering or interface corrosion.
• Autoclave: 2½ hours at 218° F and 2 psig left no facer or liner delamination.

Structural performance is tested to ASTM E1592 and ASTM E72, and the results are published as load tables.

Surface burning (ASTM E84) gave a flame spread under 25 and smoke developed under 450. The panel passed NFPA 285 for exterior non-load-bearing wall assemblies containing combustible components. It is Class 1 fire rated under FM 4880.

Approvals issued for ShadowLine itself:

• FM Class 1 approval for exterior wall systems (FM 4881)
• Miami-Dade County Notice of Acceptance, with impact testing to TAS 201
• Florida Product Approval

Panel weight depends on thickness and on the gauge of the facer and liner. The weights below are for the 42-inch width, in pounds per square foot (psf).

• 2-inch panel, 26/26 gauge: 2.10 psf
• 2-inch panel, 24/26 gauge: 2.32 psf
• 2-inch panel, 22/22 gauge: 3.15 psf
• 4-inch panel, 26/26 gauge: 2.52 psf
• 4-inch panel, 22/22 gauge: 3.57 psf
• 8-inch panel, 26/26 gauge: 3.36 psf
• 8-inch panel, 22/22 gauge: 4.39 psf
• 3-inch panel, 24/26 gauge: 2.52 psf
• 3-inch panel, 22/22 gauge: 3.36 psf
• 5-inch panel, 24/24 gauge: 3.15 psf
• 5-inch panel, 22/22 gauge: 3.77 psf
• 6-inch panel, 26/24 gauge: 3.14 psf
• 6-inch panel, 22/22 gauge: 3.98 psf
• 2.5-inch panel, 24/24 gauge: 2.62 psf
• 2.5-inch panel, 22/22 gauge: 3.25 psf
• 4-inch panel, 24/24 gauge: 2.94 psf
• 8-inch panel, 24/24 gauge: 3.76 psf

The lightest 42-inch panel is the 2-inch 26/26 version at 2.10 psf. The heaviest is the 8-inch 22/22 version at 4.39 psf. Gauge pairs are written as facer gauge first, then liner gauge.

ShadowLine goes on exterior walls. It is not a roof panel.

Each version is set by four choices: thickness, exterior gauge, interior substrate and finish.

• Thickness: 2, 2.5, 3, 4, 5, 6 or 8-inch.
• Exterior gauge: 26, 24 or 22, always with a 26 gauge interior liner.
• Interior substrate: Galvalume or stainless steel.
• Exterior finish: siliconized polyester or low-gloss PVDF.
• Interior finish: polyester, siliconized polyester or plastisol (PVC).

Texture is a further choice. Smooth or embossed can be set for either face. The five flutes and the 1¼" reveal are the same on every version. Lengths run from 8'-0" to 75'-0" and the coverage width stays at 42 inches.

The 2.5-inch panel at 26/26 gauge weighs 2.21 psf. The 3-inch panel weighs 2.31 psf. The 5-inch panel weighs 2.73 psf. The 6-inch panel weighs 2.94 psf. Each figure is for the 42-inch width.