Commercial Metal Roofing in Kalispell
Sisu Roofing installs and repairs commercial metal roofing in Kalispell and across the Flathead Valley: the shops, warehouses, ag buildings, and light commercial spaces that keep this valley working. Metal is the default roof for these buildings for good reason, and getting it detailed right is the difference between a roof you forget about and one that leaks at every screw line in ten years. Every commercial estimate starts with a drone flight, so you get an aerial condition report before you commit to anything.
Metal systems for working buildings
Commercial metal is not one product. Exposed-fastener panel over purlins is the economical standard for post-frame shops and ag buildings. Structural standing seam suits buildings where the roof is the weather line for inventory, equipment, or tenants and fastener gaskets are an unacceptable risk. Insulated panel assemblies serve conditioned spaces. We install and repair across that range, and we spec the system to how the building earns its keep: a hay shed and a climate-controlled warehouse should not get the same roof, and with us they will not.
- Exposed-fastener panels for post-frame shops and ag buildings
- Standing seam for buildings where leak risk is unacceptable
- Repairs, panel replacement, and fastener re-securing on existing roofs
Retrofitting over an existing metal roof
Many Flathead commercial buildings have an aging screw-down roof with backed-out fasteners and weathered gaskets. Full tear-off is one answer, but a retrofit is often smarter: new panels installed over the existing roof on a sub-purlin framework, keeping the building dry and in use the whole time. It avoids exposing the interior during the work, adds an insulation opportunity in the cavity, and typically costs less than tear-off and rebuild. The drone survey plus a fastener-line inspection tells us whether your roof is a retrofit candidate or genuinely needs to come off.
Working around your operation
A commercial roof job that shuts down the business underneath it costs more than the invoice says. We stage material drops and crane time around your delivery hours, keep egress and loading doors clear, and sequence work so any interior exposure is short and planned. On occupied buildings we coordinate with tenants directly when you want us to. The goal is that your customers along Hwy 2 or Hwy 93 never notice the roof was replaced, except that the building looks better.
Snow load, condensation, and the valley's demands
Commercial metal in the Flathead has two enemies: snow and condensation. Long panel runs shed big snow loads, so retention and gutter design matter even more than on homes, and drift zones behind parapets or against taller walls need honest structural attention. Condensation is the quieter killer: an uninsulated metal roof over a heated shop rains on the inside in winter. We address vapor and ventilation as part of the roof design, because a dry building is the actual product you are buying.
Systems matched to the building's use, from ag to conditioned commercial
Retrofit options that keep the building open during the work
Snow retention and drainage designed for long commercial panel runs
Condensation and ventilation addressed, not ignored
Aerial condition documentation before and after
Licensed Montana contractor (400855IC)
How it goes
- 01
Drone survey
We fly the building and deliver an aerial condition report: panels, fasteners, flashings, and drainage.
- 02
Scope and system proposal
Repair, retrofit, or replacement, quoted in writing with the reasoning and tradeoffs laid out.
- 03
Scheduled install
Work sequenced around your operating hours, with egress kept clear and interior exposure minimized.
- 04
Closeout documentation
Final drone flight and photo file for your records, insurance, and future maintenance baseline.
