Leaking or loose metal roof repair in Vancouver, WA

Most metal roof leaks we see in Clark County trace back to small parts, not the panels. Screws loosen as the steel expands on a warm afternoon and shrinks again on a cold night. The neoprene washer under each screw head dries out and cracks after years of sun. Butyl tape at panel laps hardens and lets wind-driven rain wick in. None of that means the roof is finished.

Our crews repair both common systems: exposed-fastener panels, which are typical on shops, barns and budget re-roofs, and standing seam, where the fasteners hide under raised seams. The repair methods differ. On exposed-fastener roofs we usually replace screws with oversized ones and reseal laps. On standing seam we look at clips, seam closures, flashing and the trim pieces where most of the trouble starts.

Where metal roofs actually leak

The weak points on a metal roof are predictable. Exposed screws top the list, especially ones driven at an angle or overtightened so the washer squashed out sideways. Next come end laps, where one panel overlaps the one below it on long runs. Then the ridge cap, where foam closures shrink and let rain blow in under a strong east wind. Pipe penetrations are another common spot, because a rigid boot cannot follow the panel ribs well.

Condensation also gets blamed for a lot of roof leaks. A shop with bare panels and no vapor barrier can drip from the underside on a cold, damp morning even when the roof is tight. We check for this before replacing anything, because the fix is often insulation or ventilation rather than sealant. Telling the two apart saves money, and it keeps a dry roof from being torn into for no reason.

What a metal roof repair visit includes

We start on the roof, not in the attic, because metal leaks often travel along a rib before they drip. A roofer walks the panels in soft-soled shoes, stepping only where the deck or purlins support the weight. Each suspect area gets marked, photographed and explained before any work begins. Small fixes such as resealing one pipe flashing are often done on the same visit when we have the parts on the truck.

• Replacing failed screws with larger-diameter fasteners and new washers
• Cleaning and resealing panel end laps with butyl tape
• Refitting or replacing ridge cap and foam closures
• Swapping rigid pipe flashings for flexible metal-roof boots
• Spot-treating surface rust and priming cut edges
• Replacing single damaged or rusted-through panels

Standing seam versus exposed-fastener repairs

Exposed-fastener panels are the easier of the two to repair. Every screw is visible, and a section of panel can be unscrewed and replaced without disturbing much around it. The tradeoff is that these roofs need attention more often, since there are hundreds of washers that will all age. On many older shops we recommend a full screw replacement instead of chasing one leak at a time, because the rest of the washers are usually close behind.

Standing seam repairs take more care. Panels lock together along the seams and are held by hidden clips, so replacing one panel can mean unseaming its neighbors. Most standing seam leaks we fix are at the trim: the eave, the rake edge, a wall flashing or a skylight curb. Matching color and seam profile matters, so we bring sample pieces and confirm a match before ordering replacement metal, so the repair does not stand out.

When repair stops making sense

A metal roof is worth fixing when the panels have life left. We look for rust that has eaten through the coating and into the steel, especially along the bottom edges of panels and around fasteners. If more than a few panels are perforated, or the roof has been patched with mismatched sealant so many times that water now runs in odd paths, a new roof may cost less over time. We will tell you which side of that line your roof is on and show the photos that support it.