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Sisu Roofing & Construction
Sisu Roofing · Flathead Valley

New Roof Installation in the Flathead Valley

Sisu Roofing installs new roofs on new construction across the Flathead Valley, from custom homes outside Whitefish to shops and additions in Kalispell and Columbia Falls. A new build is a different job than a reroof: there is no tear-off, but there is a schedule with a framer behind you and drywall waiting on you. We show up when the deck is ready, dry the structure in fast, and deliver a roof system specified for snow country from the first course up.

Roof deck with underlayment being installed before shingles on a new build
Roof deck with underlayment being installed before shingles on a new build. Sisu job photo.

Roofing that keeps a build on schedule

On new construction, the roof is the gate the rest of the build waits behind. Insulation, drywall, and finish work cannot start until the structure is dried in, and every wet week costs the whole project. We coordinate directly with your builder or GC, confirm deck readiness before mobilizing, and prioritize dry-in so interior trades can start even while flashing and finish details are completed. Our drone documentation is useful here too: the builder gets aerial photos of the completed roof for the project file, and so do you.

Specifying a roof system for snow country

A new build is the one chance to get every layer right without compromise, because nothing has to be worked around. We spec for what the Flathead actually throws at a roof: snow loads that sit for months, ice damming at eaves, valley wind, and summer hail. That means ice and water shield run past the warm-wall line at the eaves, ventilation designed with the insulation plan rather than after it, and valley and penetration details that assume water will sit there frozen. Done at build time, these details cost little. Retrofitted later, they cost a lot.

  • Ice and water shield extended past the warm-wall line
  • Ridge and intake ventilation designed with the attic insulation plan
  • Closed or woven valleys detailed for ice, not merely rain
  • Flashing integrated with the weather barrier, not layered over it

Shingle, metal, or a mix

Most new Flathead homes land on architectural shingles, standing seam metal, or a combination, and we install all three. Malarkey polymer-modified shingles give a new build strong hail and cold-weather performance at a friendly cost per square. Standing seam sheds snow and suits the modern builds going up around the valley. Plenty of our new-construction work mixes them: metal on porch roofs and shed dormers where snow slides matter, shingles on the main field. We will price the options against your plans so the decision is made on numbers, not guesses.

Additions, garages, and shops

New roof installation is not only full custom homes. We roof additions that have to tie cleanly into an existing roof, detached garages, and the pole barns and shops that go up on acreage from Marion to Creston. Tie-ins are where additions leak, so we weave the new roof into the old one at the underlayment level instead of caulking a seam and hoping. If the existing roof is near end of life, we will tell you before the addition goes on, because matching a new addition to a roof you replace two years later wastes money twice.

Dry-in scheduling coordinated with your builder

Roof systems specified for Flathead snow, ice, and hail from day one

Malarkey Certified Installer and Owens Corning Preferred Contractor

Shingle, standing seam metal, and mixed-material installs

Aerial photo documentation for your project file

Clean tie-ins on additions, done at the underlayment level

How it goes

  1. 01

    Drone survey and plan review

    We fly the site or review plans, measure the roof, and confirm deck readiness with your builder before quoting.

  2. 02

    System specification

    We spec underlayment, ice shield, ventilation, and roofing material for the structure and quote it in writing.

  3. 03

    Dry-in and install

    We prioritize getting the structure watertight fast, then complete flashing, venting, and finish details.

  4. 04

    Final documentation

    A finished-roof drone flight and photo set goes to you and your builder for the project record.

  • Malarkey Certified Contractor Malarkey Certified Contractor
  • Owens Corning Preferred Contractor Owens Corning Preferred Contractor
  • Flathead Building Association Flathead Building Association member
  • Verified Montana contractor license MT Contractor Lic. 400855IC

What homeowners say about Sisu new roof installation

Kalispell and Flathead Valley homeowners, in their own words.

Ben and his team provided excellent communication and service. They were in and out and a couple of days tearing off and replacing a steep roof. We will use them again for future roofing needs on our homes.
Meghan S. · Google review
Ben was professional and communicative throughout the process. His crew worked hard and fast to complete project in an amazingly timely manner. The job site was spotless post installation. I highly recommend.
Pat C. · Google review

Read all 30 reviews on Google

New Roof Installation: questions we actually get

When should the roofer get involved in a new build?

Earlier than most people think. Bringing us in at the planning stage lets ventilation, ice shield coverage, and material choices get designed in rather than bolted on. At minimum, contact us before framing finishes so we can schedule the dry-in and the build does not stall waiting on a roofer.

What is the best roof for a new home in Montana?

The honest answer is that it depends on the design and budget. Polymer-modified architectural shingles handle hail and cold well at a lower cost. Standing seam metal sheds snow and suits steep or modern designs. Many new Flathead builds mix both. We quote the options side by side against your plans.

How long does it take to roof a new house?

Once the deck is ready, most new homes are dried in within a day or two and fully roofed within a week, depending on size, pitch, and material. Metal takes longer than shingles. Weather is the wild card, which is why we build schedule buffer in with your GC up front.

Do you roof garages, shops, and pole barns?

Yes. Detached garages, shops, and post-frame buildings are steady work for us across the valley, in both metal and shingle. Steel panel roofs are the usual choice on post-frame structures because they span purlins economically. We quote them the same way as houses, starting with a site visit and measurements.

Related services

Get a free new roof installation estimate

Send the address. We fly the roof, photograph it, and put the answer in writing.

★★★★★ 5.0 · 30 Google reviews · MT Contractor Lic. 400855IC