A stained ceiling under a skylight, frost on the underside of the roof deck in February, or a sheet of snow that let go and took the gutter with it — these are the three complaints that bring most people to this page, and they are closer related than they look. All three come down to how air, water and snow move across a metal roof, and all three are fixed at the ridge, the eave and the penetrations rather than anywhere in the middle of the field.
Metal roof ventilation installation works on the same balance as any other roof — intake low, exhaust high, roughly matched in free area — but the hardware is specific. A standing seam or exposed-fastener ridge needs a vent product profiled to the panel, with closure strips that fill the ribs so the opening sheds rain and blocks blown snow without choking the airflow. Slot width gets cut to the vent manufacturer's spec, not eyeballed, and the ridge cap goes over an external baffle that keeps wind-driven rain from pushing back under. Intake is the half people skip. If soffit vents are painted shut, stuffed with blown insulation, or were never there because the eave is a closed fascia detail, the ridge vent pulls its makeup air from the house instead, and you get a warm, humid attic that frosts and drips exactly like a leak.
Metal roof ventilation repair usually turns up one of a handful of things. Foam closures have crumbled and daylight shows at the ridge. Someone sealed a ridge cap solid with caulk and closed the vent entirely. Fasteners on an older exposed-fastener system have backed out around a box vent and the neoprene washers have gone hard. Bath and dryer fans are terminating in the attic rather than through the roof. Or there are three exhaust types fighting each other — a ridge vent, a couple of old box vents and a powered fan — so the fan short-circuits and pulls air in through the ridge instead of out. The fix is often removal rather than addition, which is worth knowing before you agree to "more vents."
Skylight installation on a metal roof is nearly always curb-mounted. The curb is framed and flashed, the panel is cut and the flashing kit is woven into the panel runs so that head flashing tucks under the upslope panel and the pan flashing laps over the downslope. On wide units, or anywhere on a low-slope section, a cricket above the curb diverts water and keeps debris and ice from piling against the upslope side. The failures we see are almost always sealant-dependent installs — a unit dropped in and caulked, working fine for a few seasons until the sealant shrinks and the first real freeze-thaw week opens it up.
Skylight repair starts with figuring out whether you have a leak or condensation. Water that appears only on cold mornings, runs down the inside of the frame and stops by noon is usually condensation from a humid house and poor attic ventilation, which puts you back in the first half of this page. Water that shows up during or just after rain is flashing. Fogging or a milky haze between panes is a failed insulated glass seal and means replacing the glazing or the unit. Cracked acrylic domes on older units, and curbs with rot at the corners, generally mean the curb gets rebuilt while the roof is open — doing anything else is a repeat visit.
Metal sheds snow in slabs, not gradually, and a Columbus winter usually delivers a few sun-after-snow days that trigger exactly that. Snow guard installation protects what is below: entry doors, walkways, driveways, gutters, lower roof sections, condensers and skylights sitting downslope. On standing seam, clamp-on guards attach to the seam with setscrews and need no penetrations at all, which is the preferred approach. On exposed-fastener panels, guards are fastened through the panel into structure with proper sealing, or adhesive-mounted where the panel finish and manufacturer allow — adhesive on a dirty or weathered panel is the common failure. Layout is calculated from pitch, rafter span, panel type and the load, usually as rows rather than a single line at the eave, so the snow is held across the field instead of concentrated at the edge.
Capital Ridge Roof Systems is licensed and insured, works across Columbus, Upper Arlington, Gahanna and Dublin, offers financing, and accepts a range of payment methods. Office hours are Monday to Friday, 8AM to 6PM. When you call, it helps to know the panel type, roughly when the roof went on, and whether the problem shows up with rain, with snowmelt, or on cold mornings only — that one detail usually narrows it down before anyone is on the roof.