Soprema Roofing Systems in Missoula, MT

Modified bitumen sheets can be heat-welded with a torch, set in hot asphalt, laid in cold adhesive or applied self-adhered. Torch work is fast and gives a strong lap, but it puts an open flame on the roof and needs a fire watch. Hot asphalt brings fumes. Cold-applied and self-adhered sheets avoid flame and most odor, at some cost in speed and in temperature limits.

For a hospital, a hotel or a building with wood framing, we lean toward cold-applied or self-adhered methods. For a plain industrial roof with no ignition concern, a torch may be acceptable. The written plan names the method, the fire watch and the post-work check for each roof, and the facilities team approves it before work begins.

Fire watch deserves a specific line. When a torch is allowed, a trained watch stays on the roof during the work and for a set time after the last flame, with extinguishers staged and the roof walked for hot spots. The log records start and end times, who watched and what was found. Insurers and owners often ask for it, and a log kept the same day is easy to produce. When a cold method is used, the plan says so and skips the watch.

Bitumen stiffens in the cold. Missoula sees about 45 days a year that never rise above freezing, and snow lies on the ground about 120 days a year. A cold cap sheet can crack where it bends at a parapet, and a lap that was pressed in warm weather can open in a deep freeze. Polymer-modified sheets handle cold better than plain asphalt, and the polymer type matters.

We install in the warmer part of the year, store rolls warm and keep adhesives above their minimum temperature. After the final spring thaw, we probe laps and flashing corners. Granule loss at drain sumps and edges is photographed, because bare asphalt ages quickly and a coating may be needed. A modified bitumen roof that is watched this way lasts longer than one that is not.

Drains and sumps get the same discipline. A blocked sump turns one thaw into a pond, and bitumen softens under standing water in summer. Each sump is cleared before the first freeze, photographed clear and measured against the nearest ponding line. Where water stays for days, the scope adds tapered insulation or a drain as a separate line.

The roof file records the sheet type, the polymer, the application method, the fire watch log and the cure dates. The roof warranty management record adds the terms and each repair. Coverage decisions belong to the manufacturer, and our role is to keep the owner's record complete.

Owners comparing makers can look at Johns Manville and GAF, which sell in overlapping categories. The comparison that matters is the assembly, the method and the record behind it.

In 2016 hail the size of quarters reached central and south Missoula, and a bitumen cap sheet shows hail as scuffed granules and bruises. After an event like that we walk the roof, mark the damage on a plan and photograph the drains. The record supports an insurance review and gives the owner a clean timeline. A hail damage repair follows the map. Torch, hot-asphalt and cold-applied options are priced side by side, with the fire-watch hours shown as their own line. The material hoist and the staging area are set before any torch or kettle arrives, and the weather window decides the first day.