Mesa-Lok HSE

Mesa-Lok HSE is an exterior wall insulated metal panel from PAC-CLAD. HSE stands for Heavy Stucco Embossed. The panel is a Mesa-Lok variation with a heavy stucco embossment added to the exterior face for a more pronounced texture.

It is sold for commercial and industrial structures and has the same side joint as the other wall panels in its group.

• Panel use: exterior wall only.
• Coverage width: 42 inches.
• Panel thickness comes in 2, 2.5, 3, 4, 5 and 6 inches.
• Length range: 8 feet 0 inches through 53 feet 0 inches.
• Exterior gauge: 26 or 24. Interior gauge: 26.
• Nominal R-value: R-8 per inch of thickness.

The exterior texture is heavy embossed, written as Heavy Stucco Embossed in the guide specification. The interior is embossed or smooth.

Exterior substrates are Galvalume and G90 galvanized steel. Interior substrates are Galvalume, G90 galvanized steel and stainless steel.

Exterior finishes are siliconized polyester and low-gloss PVDF, and interior finishes are polyester, siliconized polyester and plastisol (PVC).

The core is continuously poured-in-place polyisocyanurate foam. The offset double tongue-and-groove side joint is the Green-Lock joint in the guide specification and is designed for a high-performance vapor seal.

• Thermal transmission, ASTM C518: K-factor 0.139 at 75 F mean and 0.129 at 35 F mean, in Btu-in/hr-ft2-F.
• Air leakage, ASTM E283: 0.0011 cfm/sf at 20 psf.
• Water penetration, ASTM E331: zero at 20 psf.
• Surface burning, ASTM E84: flame spread under 25, smoke developed under 450.
• Foam core: 16 psi shear, 18 psi compressive, 21 psi tensile, 2.25 pcf density, at least 90% closed cells.

The panel passed NFPA 285 and is FM 4880 Class 1 fire rated. It is a Class 1 approved exterior wall system to FM 4881, with technical bulletins ETB-0008 and ETB-0013 named for that approval and ATB-0005 and ATB-0007 for the fire results.

Large missile impact follows TAS 201 under Miami Dade County NOA No. 20-1202.02. The panel also holds Florida Product Approval 16327.1 R3 and Texas Department of Insurance Evaluation ID EC-103.

After 2,000,000 alternating cycles of L/180 deflection, the facers and liners show no delamination, foam core fracture or permanent set. Twenty-one eight-hour cycles between -20 F and 180 F, 1,200 hours at 93% humidity and 158 F, and 2-1/2 hours in an autoclave at 218 F and 2 psig produce no delamination or blistering.

Bundles are kept clean, level and protected, with one end elevated for runoff, and stacked no more than two high. Fasteners are not overdriven, and a stripped fastener is replaced by a new one in a different location. Sealant surfaces are cleaned and primed before sealant is applied, and sealant is placed without skips or voids.

Mesa-Lok HSE is the heavy stucco embossed variation of Mesa-Lok and is one of the seven profiles in the Petersen insulated metal panel range. It has a 42 inch coverage width and lengths from 8 feet 0 inches to 53 feet 0 inches.

• Load tables for walls and for the BAC-08 and BAC-12 clips, and a partition span table.
• FM approval documents cover 4880, 4881, 4881 BAC-08 and 4881 Back Fastened.
• Six technical bulletins cover air and water infiltration, flame spread and smoke, K-factor, NFPA 285, panel weights and R-values.

Open-framing details for Mesa-Lok HSE walls are drawn horizontally and vertically around doors, windows, corners, sills and the side joint. Only the vertical set has a stack joint detail.

Mesa-Lok HSE is listed beside Mesa-Lok in the manufacturer's range of seven insulated panel profiles. Its parent company is Carlisle Corporation, within Carlisle Construction Materials.