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Exterior Pro Materials
MAC Metal Architectural›Polymac Architectural Panels

Polymac

Polymac by MAC Metal Architectural answers the demand for contemporary, large-format cladding with a hidden-fastener panel system that leaves no visible screws or joints on the facade. Available in four sizes from 12×48" to 20×72", Polymac panels clip into transition moldings for a seamless, architectural appearance across Wood Grain, Metallic, and Solid colour collections. The 24-gauge pre-painted galvanized steel construction, paired with a TEXTURAL III & IV matte finish, delivers durability and modern visual depth with a 40-year warranty.

1" depth (25.4 mm)In progress (ASTM D5206-06A) wind19 colours
Request a QuoteDatasheet

Available Colours

19
Polymac - Cedar

Cedar

Wood Collection

Wood Collection(6)

Metallic Collection(7)

Solid Collection(6)

Colours shown are approximate representations only and may appear differently on screen than the actual product. Request a physical sample before making your final decision.

Profiles & Specifications

Polymac - Panel 12 × 48 profile
PM-12x48Panel 12 × 48

Standard Polymac panel — 12" covered height, 48" length. 8 panels per box, 32 sq.ft. coverage.

Length48" (1219.2 mm)
Height / Width12" coverage (304.8 mm)
Thickness1" depth (25.4 mm)
Panel Weight4.25 lbs/panel (1.93 kg) · 48 lbs/box
Panels/Box8 panels/box
Coverage32 sq.ft./box (3.0 m²)
Wind ResistanceIn progress (ASTM D5206-06A)
InstallationHorizontal only — panels installed in vertical columns, 16" o.c. screwing on 45° furring
BackingWood furring 1"×3" at 45° angle, 12" c/c | Metal Z-bar furring 18g or 20g at 45° angle

Vented version available: 4.594 sq.in. of ventilation per linear foot (12" panels without foam only).

Polymac - Panel 12 × 72 profile
PM-12x72Panel 12 × 72

Long Polymac panel — 12" covered height, 72" length. 8 panels per box, 48 sq.ft. coverage.

Length72" (1828.8 mm)
Height / Width12" coverage (304.8 mm)
Thickness1" depth (25.4 mm)
Panel Weight6.36 lbs/panel (2.89 kg) · 68 lbs/box
Panels/Box8 panels/box
Coverage48 sq.ft./box (4.46 m²)
Wind ResistanceIn progress (ASTM D5206-06A)
InstallationHorizontal only — transition moldings every 72"
BackingWood furring 1"×3" at 45° angle, 12" c/c | Metal Z-bar furring 18g or 20g

Transition moldings (M15P) spaced at 72" intervals for this panel length.

Polymac - Panel 20 × 48 profile
PM-20x48Panel 20 × 48

Wide Polymac panel — 20" covered height, 48" length. 8 panels per box, 53.33 sq.ft. coverage.

Length48" (1219.2 mm)
Height / Width20" coverage (508 mm)
Thickness1" depth (25.4 mm)
Panel Weight6.36 lbs/panel (2.89 kg) · 70 lbs/box
Panels/Box8 panels/box
Coverage53.33 sq.ft./box (4.96 m²)
Wind ResistanceIn progress (ASTM D5206-06A)
InstallationHorizontal only — transition moldings every 48"
BackingWood furring 1"×3" at 45° angle, 12" c/c | Metal Z-bar furring 18g or 20g

20" exposure creates a bold, wide-plank architectural look.

Polymac - Panel 20 × 72 profile
PM-20x72Panel 20 × 72

Large Polymac panel — 20" covered height, 72" length. 8 panels per box, 80 sq.ft. coverage.

Length72" (1828.8 mm)
Height / Width20" coverage (508 mm)
Thickness1" depth (25.4 mm)
Panel Weight9.54 lbs/panel (4.34 kg) · 100 lbs/box
Panels/Box8 panels/box
Coverage80 sq.ft./box (7.44 m²)
Wind ResistanceIn progress (ASTM D5206-06A)
InstallationHorizontal only — transition moldings every 72"
BackingWood furring 1"×3" at 45° angle, 12" c/c | Metal Z-bar furring 18g or 20g

Highest coverage per panel — ideal for large facades with minimal joints.

Polymac - Corner Panel 12" profile
PM-CORNER12Corner Panel 12"

Pre-formed corner panel for 12" Polymac. 12" standard length, 4 panels per box, 8 sq.ft. coverage.

Length12" (304.8 mm)
Height / Width12" coverage (304.8 mm)
Thickness1" depth (25.4 mm)
Panel Weight2.12 lbs/panel (0.96 kg) · 12.5 lbs/box
Panels/Box4 panels/box
Coverage8 sq.ft./box (0.75 m²)
Wind ResistanceIn progress
InstallationHorizontal — installed at outside corners to maintain continuous no-screw look
BackingSame furring as field panels

Eliminates need for field-bent corners. Available in all 19 Polymac colours.

Polymac - Corner Panel 20" profile
PM-CORNER20Corner Panel 20"

Pre-formed corner panel for 20" Polymac. 12" standard length, 4 panels per box, 13.33 sq.ft. coverage.

Length12" (304.8 mm)
Height / Width20" coverage (508 mm)
Thickness1" depth (25.4 mm)
Panel Weight3.18 lbs/panel (1.45 kg) · 19 lbs/box
Panels/Box4 panels/box
Coverage13.33 sq.ft./box (1.25 m²)
Wind ResistanceIn progress
InstallationHorizontal — installed at outside corners to maintain continuous no-screw look
BackingSame furring as field panels

Matches 20" field panels exactly. Available in all 19 Polymac colours.

Certifications & Testing Standards

Polymac meets or exceeds the following Canadian and international performance standards.

Test / PropertyStandardResult / Value
CAN/ULC-S135 — Fire Resistance, Non-Combustible Construction (without foam backing) — Canada
-Certified
ASTM E84 — Class A Fire Resistance (without foam backing) — USA
-Certified
NFPA — 0 Flammability Hazard Rating
-Certified
ASTM E2768 — Non-Combustible Construction for Wildland Urban Interface (WUI) in California (without foam backing)
-Certified
W.U.I. Wildland Urban Interface Accreditation — Registration 8140-2358-0500 (without foam backing)
-Certified
ASTM E283 — Air Leakage of Wall Assembly: Compliant
-Certified
ASTM B-117
-2000h — Corrosion Resistance Standard for MAC Screws
40-Year Limited Warranty — Paint Defects, Discoloration & Chalking
-Certified
LEED Recyclable —
-86% Recycled Content; 100% Recyclable at End of Life

Compatible Accessories

Installation Guide

  1. Polymac is a horizontal-only panel system. Panels are installed in vertical columns (left to right), with each column completed before moving to the next. Installation proceeds bottom to top within each column.

  2. Install furring at a 45° angle every 12" c/c — this gives 16" c/c for screwing. Use wood furring 1"×3" or metal Z-bar furring (18g or 20g). All furring must be level horizontally and vertically.

  3. Wood Collection panels come in multiple plank variations (numbered on the back). Install in random order to avoid a wallpaper effect — never repeat the same sequence.

  4. Do NOT install over ZIP System Insulated R-Sheathing or similar dual-composite panels — insufficient rigidity causes movement, deformation, and oil canning.

  5. Install Starting Strip (M10G) 3" above the base of the wall. Secure with one screw first, verify level, then fasten fully. A level starting strip is critical — it guides the entire installation.

  6. Install transition moldings (M15P U-Trim) starting 11" from the outside corner of the building. Space subsequent moldings at 48" intervals for 48"-long panels, or 72" intervals for 72"-long panels.

  7. Insert each panel into the starting strip and transition moldings, then secure with screws on the furring. Use the plastic spacers provided by MAC for the first column — they set the spacing reference for all subsequent rows.

  8. Fasten screws with moderate contact only — do not overtighten. Screws must not exert upward or downward pressure on the panel; Polymac panels are designed to accommodate thermal expansion.

  9. For a vertical cut that will be visible (not hidden in J-Trim): cut the panel with steel shears, remove 1.5" of foam at the cut edge, then use the MAC manual folding tool to recreate the factory fold.

  10. For a horizontal cut at the top of the wall: take the measurement to the roof truss, subtract 1/2" for the expansion gap, then cut and install J-Trim (M01G) over the top edge.

  11. For high-rise or wind-exposed buildings: apply MAC sealant inside the female part of the U-Trim in 1/2" × 1" strokes every 24" for added weather resistance.

  12. Notify your supplier before installing more than 144 sq. ft. (2 boxes) if any product issue is discovered during installation to ensure warranty coverage is preserved.

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