Magna-Loc Standing Seam

Mechanical seam steel roofing with low slopes in mind.

Magna-Loc Standing Seam
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Style Plus Strength

Magna-Loc is a 2″ high standing seam that is field seamed for strength and weather tightness. Beefy ribs can handle open spans up to 5′ and slopes as low as 0.5:12.

Design & Size

We provide Magna-Loc custom cut to the inch per specifications. Any length is available from 5′ up to 45′. Magna-Loc’s design features 2″ high snap-lock style ribs, spaced 16″ or 18″ on center. Thickness options include 24 gauge as standard and 22 gauge as optional.


18", 16" Width (Coverage)
Cut to Inch From 5'-45'

Gauge & Weight

24 Gauge - 1.21-1.25 Lb / Sq Ft (check width)
22 Gauge - 1.59-1.64 Lb / Sq Ft (check width)

Warranty & Finish

Painted Magna-Loc carries a 40 year paint warranty and 30 year fade/chalk warranty. Unpainted Galvalume carries a 25 year warranty. The painted option is a baked on enamel paint over primer and Galvalume. The non-painted Galvalume option is 45% zinc and 55% aluminum with a clear acrylic overcoat.

Finish & Warranty

Painted: 40 years
Galvalume: 25 years


Energy Star® Rated

Purpose & Use

Magna-Loc is primarily a commercial standing seam system. Hidden fasteners and a mechanically seamed design ensure a tight seal on slopes down to 0.5:12.

Installation is most commonly over wood or steel decking, although it can be installed over open framing as well.

Minimum Slope



Solid Deck
Open Frame

Florida Approvals

Florida Building Code
Miami-Dade Hurricane Zone



Snowdrift White W81 (24ga)
Linen White 81 (24ga)
Sandstone W51 (24ga)
Parchment W74 (24ga)
Taupe 74 (24ga)
Khaki 88 (24ga)
Mansard Brown 133 (24ga)
Medium Bronze H4 (24ga)
Weathered Copper W150 (24ga)
Dark Bronze 50 (24ga)
Ash Grey 25 (24ga)
Old Town Grey W25 (24ga)
Old Zinc Grey W29 (24ga)
Slate Grey W38 (24ga)
Matte Black 106 (24ga)
Aged Copper 65 (24ga)
Patina Green W58 (24ga)
Hemlock Green M7 (24ga)
Classic Green 66 (24ga)
Felt Green W66 (24ga)
Patriot Red 73 (24ga)
Terra Cotta W72 (24ga)
Colonial Red W75 (24ga)
Brandywine P8 (24ga)
River Teal 59 (24ga)
Metallic Silver K7 (24ga Premium)
Champagne Metallic 168 (24ga Premium)
Mistique Plus W31 (24ga Premium)
Copper Penny W92 (24ga Premium)
Antique Patina M1 (24ga Premium)
Tahoe Blue W71(24ga)
Ocean Blue 35 (24ga)
Regal Blue W35 (24ga)
Galvalume (Non-Painted)

Painted Magna-Loc® finishes are Energy Star rated, reflecting 25-67% of the sun’s rays.
Available colors vary by branch and gauge. Color accuracy is limited by scanning and viewing conditions.
Actual samples available on request.


Primarily PDF downloads, these resources provide general, installation, and testing data.

Testing: UL Listed
UL 2218
Class 4 Impact Resistance
UL 790
Class A Fire Resistance Rating
UL 580
Class 90 Wind Uplift
Testing: Miami-Dade Approvals
NOA# 13-0905.02
Min 24ga., 16” wide, over 19/32” or greater plywood or wood plank
NOA# 13-0905.03
Min 24ga., 16” wide, over 22ga or greater steel deck
Testing: Florida Approvals
FL# 11560.6
Min 24ga., 16" wide, over 19/32" thick plywood or 3/4" wood plank
FL# 11560.7
Min 24ga., 16" wide, over min 22ga B-deck with 4" max rigid insulation
FL# 10999.5
Min 24ga., 16" wide, over open steel supports
Energy Star®

Painted Magna-Loc finishes are Energy Star® rated, reflecting 25-67% of the sun’s rays.

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