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Union Corrugating Master Rib 3.17-ft x 12-ft Ribbed Galvalume 29-Gauge Steel Roof Panel

Name: Union Corrugating Master Rib 3.17-ft x 12-ft Ribbed Galvalume 29-Gauge Steel Roof Panel
Brand: Union Corrugating
SKU: 3318506
Rating: 4.4 (601 reviews)

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4.4

601

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Manufacturer Color/Finish: Galvalume 29-Gauge

Length (Feet): 12

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MasterRib is Union Corrugating’s most popular metal roofing panel and is an industry leader in strength and durability. This versatile metal roofing panel features classic looks and is used in a wide range of roofing and sidewall applications, including residential, commercial, post-frame and agricultural. MasterRib is designed with extra wide ribs to increase strength and ease handling and installation. Another unique feature of the MasterRib panel is the extra large siphoning channel under the under-lap rib which provides extra leak resistance in extreme wind and rain conditions. The Galvalume coating on the panels provides rust resistance with a 25 year substrate rust warranty.

29 Gauge MasterRib Galvalume roof panel
Extra wide ribs 3/4-In high for increased strength
Panel has a 36-In wide coverage
Oversized anti-siphoning channel for extra leak-resistance
Most popular residential panel profile
Exposed fastener design
Meets standards for UL 2218 impact resistance
Can be installed over shingles
3:12 Minimum recommended roof pitch

General
Color/Finish Family	Silver	Package Quantity	1
Profile	Ribbed	Manufacturer Color/Finish	Galvalume 29-Gauge
Material	Steel	Multi-Wall	No
Paintable	No	Series Name	Master Rib
Venting Required	No

Dimensions
Panel Size (Sq. Feet)	38.04	Thickness (Inches)	.014
Length (Feet)	12	Width (Feet)	3.17
Weight (lbs.)	25.08

Features
Gauge	29	For Use on Shed	Yes
For Use on Pergola	No	For Use on Gazebo	Yes
For Use on Chicken Coop	No	Impact Resistance	Yes

Compatibility
Brand/Model Compatibility	Master Rib	For Use with Greenhouses	No

Certifications
CA Residents: Prop 65 Warning(s)	No

Warranty
Warranty	20-year limited

Miscellaneous
UNSPSC	30161600

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Review

4.4 out of 5

601 Reviews

90% Recommend this product

Ratings may include incentivized customer reviews.

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+ 27

What Customers Are Saying

Customers overwhelmingly praise the metal roofing panels for their heavy-duty construction, sturdy build, and long-lasting durability, with many noting the professional appearance and attractive finish. Reviewers consistently commend how easy the panels are to cut, fit, and install, even for DIY projects. The substantial weight and thickness reinforce confidence in weather resistance and reliability. Most find the aesthetic appeal exceeds expectations compared to traditional options. A few report isolated issues like minor scratches or defects, and some mention pricing concerns, but these are vastly outweighed by satisfaction with quality and performance. Overall, customers strongly recommend the product for sheds, barns, and garden structures.

Customer review summary generated by AI, including incentivized reviews.

601 Customer Reviews

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Solid metal sheet

Would Recommend

Really liked this color. Could not find elsewhere. Just be aware it's not a full sheet wide. This worked fine for my application, but I imagine it might not be helpful in certain circumstances. Holds screws well and so far is corrosion resistant and easy to install.

LebosanSeptember 1, 2026
From Master Rib 3.17-ft x 8-ft Ribbed Evergreen 29-Gauge Steel Roof Panel Verified Purchaser

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Damaged

Would Not Recommend

Bought 3-12 foot pieces and one had a bad gash. I paid to have delivered but now I have to go back myself to replace with a good one.

Bob WAugust 28, 2026

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269 Questions

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		Name	Current Item Union CorrugatingMaster Rib 3.17-ft x 12-ft Ribbed Galvalume 29-Gauge Steel Roof Panel
		Ratings	601
		Width (Feet)	3.17
		Material	Steel
		Length (Feet)	12
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