Preventive Roof Maintenance in Flagstaff, AZ

Maintenance is cheaper than a collapse. A flat roof in Flagstaff, AZ holds a snowpack most of the winter, and the drains decide where the melt goes. A roof with a clogged drain and a loose flashing carries that snow badly. A roof that was walked in October carries it well. We run two scheduled walks a year, fall and spring, and we add a visit after any heavy storm.

The goal is simple. Find the small fault before the snow finds it. Write down what we found. Fix what can wait until it has to be fixed, and fix what cannot wait now.

Fall Visit: Before the Freeze

Freezing temperatures return in late September. The fall visit comes before that. We clear drains, scuppers and gutters. We check every flashing, every curb and every seam. We tighten loose edge metal. We look at the places where snow will drift: behind parapets, around mechanical wells, along walls that rise above a lower roof.

Debris is the first target. Pine needles, leaves and grit collect at drains all summer. Needles packed into a drain in October become a frozen plug by January. Clear it in October, not January.

We also look at sealants. Summer sun at 7,000 feet is hard on them. Brittle sealant cracks at the first deep freeze. We replace what is dry and photograph the work. Every visit leaves a dated record.

Roof access is part of the visit. We check hatches, ladders and guardrails before the snow hides them. A hatch that will not open under a drift is a hazard. We also mark drain locations with stakes or paint so crews can find them under snow.

Spring Visit: What Winter Did

The spring visit finds damage while it is small. Snow load, ice and repeated thaw leave marks. We look for sagging, ponding where none existed, torn flashing, split seams and bent edge metal. We check the ceiling below for stains.

Freeze-thaw cracks seals. Water gets into the gap, freezes, expands and widens it. By April a hairline crack can be an open seam. We find those and close them before the monsoon begins in July. Monsoon rain on an open seam is a leak by the end of the week.

Spring is also the time to check structure. Look for bowing trusses, sticking doors and cracks in interior walls. Those are structural flags, not leaks. We report them to the owner and recommend an engineer where the signs point that way.

Storm Visits: After the Heavy Ones

The storm that closed February 2023 piled up to 24.5 inches on parts of Flagstaff by March 2. Officials then confirmed roofs had come down under that weight. Their warning list for owners ran from sagging ceilings to bowing trusses to severe leaks. We use that list.

After a heavy storm, we walk the roof as soon as it is safe. We check drains first, because melt follows the storm. We look for drift lines behind parapets and around units. We check for ceiling sag, new cracks and leaks. The visit is short, and it is worth the call.

The city and Coconino County share one phone line for anyone who spots structural roof trouble after a big snow. Call that line for the structure, then call us for the membrane and drains.

Ice needs its own look. A ridge of ice at an eave or drain holds meltwater back. It forms where heat leaks into the roof from the building below. We note the source and recommend sealing it. Ice damage that gets past the visit goes to snow and ice roof damage repair.

Monsoon: July and August Checks

Annual precipitation runs about 20 to 22 inches. The summer monsoon supplies roughly a third of it. Thunderstorms are most common in July and August. A drain that handles snowmelt can fail in a cloudburst.

We check overflow scuppers and drain capacity before July. A scupper set at the right height saves a building when the main drain backs up. We check parapet height and flashing height at the same time. A low flashing is easy to overtop.

The 2022 Pipeline and Tunnel fires brought post-fire flash flooding. Properties near Highway 180 and in Doney Park should check grading and roof drainage together. Water that leaves a roof must have somewhere to go. Our roof drain and scupper work covers both ends.

Records: What You Get Back

Every visit ends with a report. It lists the roof sections, what we checked, what we found and what we fixed. It has photographs. It has a short list of open items, ranked by urgency. It has a note on the next visit date.

The records help in three ways. They show the owner what is changing. They support an insurance claim after a storm. They tell a buyer or lender the roof has been looked after. A written condition report builds on the same file.

Property managers with several buildings get one report per building and one summary. The summary ranks the roofs so the budget goes to the worst first. A commercial roof inspection sets the baseline for the program.

The report also lists the roof's walk paths and drain locations. A crew that arrives at night in a storm can then find the hatch and the drains. Owners keep a copy on site and a copy in the office.

Where: Buildings We Maintain

The Railroad Addition Historic District holds downtown's older commercial buildings. After downtown fires, an 1897 ordinance forced brick, stone or iron construction, which puts older roofs on masonry walls. Parapets, coping and flashing need steady attention there. Mike's Pike, a half-mile of old Route 66, is mostly industrial. Boxy metal buildings there call for fastener and lap checks. Retail roofs, wherever they stand, collect rooftop units and the penetrations that come with them.

We schedule by building type and by calendar. Schools and campuses get summer slots. Retail gets the quiet months. Industrial gets windows between shifts. Owners in Downtown Flagstaff and Southside and Mike's Pike can put all of their roofs in one program.

Timing matters in this climate. Work needs dry surfaces and temperatures that let adhesives cure. That leaves a window from late spring through early fall. We book the big repairs inside it and use the shoulder weeks for small fixes and checks.