How To Install Metal Roofing On A Shed

November 28, 2025

2 min read

To install metal roofing on a shed, you need to prepare the base, measure your shed, buy the right materials, and screw the panels down securely. Metal roofs are a smart choice for sheds because they last a long time and handle bad weather well. According to industry data, metal roofing lasts 40 to 80 years, which is much longer than asphalt shingles that only last 20 years. This guide walks you through each step to do the job right.

What Materials Do You Need?

Start by picking your metal roofing type and buying all the supplies. Metal roofing costs between $5.50 and $17.05 per square foot when installed, so budget wisely. You will need metal panels, roofing screws, trim pieces, sealant, and flashing.

Here are the main materials:

Metal roofing panels (standing seam or corrugated)
Roofing screws with rubber washers
Metal trim and flashing
Roofing sealant or caulk
Underlayment (if adding insulation)

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How Do You Prepare the Shed?

Clean the old roof and remove any debris, moss, or algae. Check that the roof deck is solid and flat.

Fix any soft or rotted wood before installing metal panels. Install new underlayment if needed for extra protection. Make sure all gutters and downspouts are in place. According to industry data, keeping your roof and gutters clean helps prevent damage and extends roof life.

What Is the Installation Process?

Measure your shed roof carefully from edge to edge. Add 6 inches to your measurements for overhang at the edges.

Start at the bottom corner of the roof and snap a chalk line to keep panels straight. Lay the first metal panel and screw it down using roofing screws spaced 12 to 18 inches apart. Overlap each new panel over the previous one by at least 1.5 inches. According to This Old House, the average U.S. roof size is 2,647 square feet, so plan your shed roof accordingly in smaller sections.

Install metal trim along the edges and ridges. Seal all seams and screw holes with roofing sealant. Install flashing around any vents or pipes.

How Long Does Installation Take?

A small shed roof takes 4 to 8 hours for one person. Larger sheds may take a full weekend.

Work on a dry, cool day to avoid slipping on the metal. According to RubyHome, roof installation costs range from $4 to $40 per square foot, and DIY work can save about 50 percent on labor. However, mistakes can cost more money in long-term repairs, so take your time and follow these steps carefully.

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Talk with a local roofing contractor to review your options and get a detailed estimate for your project.