Most Flagstaff roof repairs start with ice, not rain. Water gets into a seam in October, freezes in November, and lifts the edge a little more every night. By March the opening is wide enough to show up on a ceiling. Commercial Roofing Flagstaff repairs commercial roofs in Flagstaff, AZ by working that chain backward. We find the opening, find what widened it, and fix both. A patch on a symptom lasts until the next thaw.
Repair is the right call when the roof is sound and the failures are local. It is the wrong call when the failures are everywhere. We tell you which one you have.
A repair visit begins on the roof, not at the desk. We walk the field, the edges and every penetration with a moisture meter and a probe. We photograph each defect, mark it on a roof plan and rank it by risk to the interior.
Seams and flashings come first because they fail first. Heat-welded seams on single-ply membranes can open at the laps after years of thermal movement. Base flashings pull away from walls when the sealant dries out. Pitch pockets around pipes shrink and crack. Any one of these can let in enough water to saturate the insulation below.
We also look for the quiet failures: ponded areas, clogged drains, loose coping, fasteners backing out of the deck. These do not leak today. They leak after the next storm.
A membrane problem looks different on each roof type. On TPO roofing and PVC, we clean the surface, hot-air weld a patch and probe the edge. On EPDM roofing, we use primed, adhered patches or seam tape. On modified bitumen, we torch or cold-apply a patch and lap it properly over the old sheet.
Blisters in built-up and bitumen roofs are a different case. A blister is trapped moisture or air under the sheet. If it is small and intact, we leave it alone. If it is cracked, we cut it open, dry the insulation and patch it. Cutting a blister without drying the layer under it only seals the water in.
Punctures from foot traffic and dropped tools are common near mechanical equipment. We recommend walk pads where service crews travel every week.
Snow load is not only a weight problem. Drifted snow stacks against parapets, curbs and rooftop units, and then moves as it melts. That movement shears flashing and loads the top edge of a wall termination. One heavy storm can bury a parapet line under two feet of snow. A flashing that held through a dry year can shear in that single load.
We replace failed counterflashing with new metal, re-seal terminations with the right sealant for the surface, and raise base flashings that sit too low. Where a coping cap has lifted, we reset it, fasten it and seal the joints. On older masonry buildings, we repoint or tool the reglet before we reinstall counterflashing so the water does not simply move behind the metal.
Edge metal also needs a hard look. Loose perimeter metal lets wind lift the membrane and lets meltwater run in.
A drain that is clogged in November becomes a pond in January. The first sunny day after a snowstorm sends meltwater to the lowest point, and if the drain is frozen or packed with debris, the water finds the nearest weak seam. We clear drains, check the strainers and test the lines. Where ponding stays more than a day or two after rain, we add tapered insulation or a new drain, or we recommend a deeper change.
The monsoon repeats the test in summer. Thunderstorms peak in July and August and bring about a third of the year's precipitation. Drains that cope with a slow melt can fail in a cloudburst. We inspect roof drains and scuppers and size overflow where the building needs it.
Every repair ends with paper. We give you a roof plan with each defect numbered, a photo before and after, the material used and the location of each patch. Keep it with the roof file. The next crew, the next buyer and the next insurer all want to know what was done and where.
That record also tells you when repair has stopped paying. Three entries at the same flashing in two winters is a trend. We flag it and put a number on the alternative. Buildings on the I-40 corridor, such as those in Bellemont and Williams, 42 miles west with about 65 inches of snow a year, get the same treatment. The records matter most for owners who manage several buildings and need to compare them.
Schedule the follow-up too. After a heavy storm, a quick walk catches new openings while they are small. A short visit in the first thaw of the season is cheap. A long one in April, after the damage has spread, is not.
Repair has a ceiling. When more than a small share of the roof is wet, or the same area fails every winter, the economics reverse. At that point a commercial roof replacement costs less than another round of patches. We show you the numbers side by side.
The signs are plain. Repeated leaks at the same detail. Insulation that squishes underfoot. Rusted fasteners and a deck that flexes. Seams that open again within a season. If you see two or three of these together, call us before the next storm.
The buildings differ by district. Mike's Pike runs to boxy metal, wooden and concrete industrial structures, while the downtown Railroad Addition sits on masonry. We read each roof on its own evidence and price repairs by defect.
Emergency water entry gets a dry-in call the same day, around the clock. Planned repairs wait for a window when the surface is dry and the temperature allows sealants and adhesives to cure. We use cold-weather products where possible and temporary dry-in where they are not. Seam welding and torch work need clean, dry surfaces, so a storm can push a planned repair back by a few days.
A good patch lasts as long as the surrounding material does. A weld on sound membrane can outlast the next decade. A patch on brittle, aged membrane may fail at the edge within a season. We tell you which one you have before we start, and we mark patches on the roof plan so the next crew can find them.
Water travels along the deck, the insulation and the ceiling grid before it drips. In a freeze-thaw climate it also freezes in place and runs later. The wet spot on the ceiling may sit tens of feet from the opening. That is why we use infrared and moisture probes instead of just looking where the stain is.
Clear the drains, reset loose coping and flashing, seal open seams and fix ponding spots. Late summer through early fall gives the best conditions for repair work, because freezing temperatures return in late September. A day of fall maintenance is cheaper than a January emergency.
Check the warranty first. Many manufacturers require approved repairs and notice of work, and a bad patch can void coverage. We read the warranty terms, use approved materials and give you a repair report with photos for your files.
Browse the services, roof systems and building types we work with across Flagstaff and nearby Arizona communities.
A walk of the roof with photos, findings and a written scope.
Active leaks, storm damage and blocked drains get a fast response.
Roofing across Flagstaff and nearby Arizona communities.