Metal roof maintenance comes down to a short list done on a schedule: check fasteners and washers, inspect sealant at trim and penetrations, clear debris, look for scratches or rust, and keep gutters draining. Twice a year plus after every major storm is enough for most North Texas homes. Most of it can be checked from the ground or a ladder; anything on the roof is best left to a pro.
Seeing rust streaks, loose screws or a drip under your metal roof? Call Cannon Roofing at (940) 627-1045, 24/7, or reach us through our contact page.
Why metal roofs still need maintenance
Metal roofs have a reputation for being maintenance-free, and the panels themselves do last a long time. The parts around the panels are what wear: rubber washers on screws, sealant tape at laps, butyl at trim, pipe boots and closures at the ridge and eave. Texas heat is especially hard on these because metal expands and contracts every day, working fasteners and sealants loose over the years.
Exposed-fastener vs standing seam
On ribbed exposed-fastener panels, hundreds of screws go through the roof surface, and each one relies on a rubber washer to stay dry. Those need the most attention. Standing seam hides its fasteners under the seams, so the focus shifts to trim, penetrations and seams. Our standing seam metal roof guide explains how the system works.
A seasonal metal roof maintenance checklist
Spring: before and after hail season
- Scan the roof from the ground or with binoculars for dents, displaced trim or lifted panel edges after each storm.
- Check gutters and downspouts; hail and wind strip leaves and twigs from nearby trees and pack them in.
- Look inside the attic or under the deck for fresh drips or wet insulation after heavy rain.
Summer: heat and movement
- Watch for screws backing out, which shows up as small raised heads or rust rings around fasteners.
- Check sealant at ridge caps, pipe boots and wall flashing for cracking or pulling away.
- Note any oil-canning (waviness) that seems to be getting worse, which can point to fastening issues.
Fall: debris and drainage
- Clear leaves and branches from valleys, behind chimneys and along panel ribs where they trap moisture.
- Clean gutters and confirm downspouts discharge away from the foundation.
- Trim limbs that rub or drop debris on the roof.
Winter: condensation and ice
- On cold mornings, check the underside for condensation dripping, especially in shops and barndos.
- After ice storms, look for bent gutters or snow guards and loose trim.
Handling scratches, rust and dissimilar metals
Touching up scratches
Painted steel panels are protected by a metallic coating and a paint system. A small scratch that exposes bare steel can start to rust, so it should be touched up with the manufacturer's matching paint. Avoid overspraying a large area; touch-up paint weathers differently from factory finish and can look blotchy.
Scratches usually come from foot traffic, dragged tools, falling limbs or satellite and antenna installers. If you can, keep other trades off the panels, or ask them to use soft-soled shoes and stay on the structural lines where the metal is supported.
Preventing corrosion
Rust rarely starts in the middle of a clean panel. It begins where water, debris or incompatible materials sit against the metal, or where cut edges were left unprotected at installation.
Things that cause corrosion
- Metal shavings left from cutting or drilling, which rust and stain the finish.
- Copper or treated lumber in contact with galvanized steel.
- Pooling water or wet debris sitting against panels.
- Abrasive cleaners or pressure washing at close range.
For cleaning, mild soap, water and a soft brush or cloth are enough. Rinse top to bottom and don't walk on panels to do it unless you know where the structural supports are.
When to call for professional service
Some tasks are fine for homeowners from the ground. Others belong on the roof with the right equipment and experience. Call a roofer when you see:
- Multiple loose or backed-out screws, or washers that are cracked and flattened.
- Leaks at panel laps, ridge or trim.
- Hail dents with split seams or damaged coatings.
- Rust spreading from fasteners or cut edges.
- Pipe boots or penetrations that have cracked or pulled away.
Replacing washers usually means swapping in new, slightly larger screws with fresh washers, driven to the right depth. Overdriving crushes the washer and underdriving leaves a gap; both leak. Our roof repair crews handle this regularly.
Keeping it on schedule with the Roof Protection Plan
If you'd rather not track a checklist yourself, Cannon Roofing's Roof Protection Plan is a membership that keeps your roof on a regular maintenance and inspection schedule. See the plan page for current membership details. Our crews are factory trained, every employee carries the Technician Seal of Safety, and we've been caring for roofs across Wise County and North Texas since 1994.
Frequently asked questions
How often should metal roof screws be replaced?
There's no fixed interval. It depends on screw quality, sun exposure and movement. Inspect them regularly and replace any with cracked washers, rust or backed-out heads.
Can I pressure wash a metal roof?
Low pressure from a distance is usually fine, but high pressure can damage coatings and force water past laps. Soap, water and a soft brush are safer.
Why does my metal roof drip on cold mornings?
That's often condensation, not a leak. Warm indoor air meets cold metal. Insulation, a vapor retarder and ventilation are the usual cures, and an inspection can confirm the cause.
Keep your metal roof working for decades. Call Cannon Roofing at (940) 627-1045, day or night, to schedule an inspection at no charge in Decatur, Alvord, Paradise, Springtown or anywhere nearby. You can also send us a message through our contact form.